Gas-phase flow field in a cyclone has an important influence on particle separation process. Both experiment and simulation indicate that the swirling flow has a strong dynamic characteristics, which shows that the flow parameters fluctuate with low frequency and high amplitude. However, the previous studies were mainly focused on the steady state time-averaged characteristics of the flow field, and lack of systematic research on the dynamic characteristics. The main manifestation of the dynamic characteristics of swirling flow is that the center of the swirling flow in a cyclone is deviated from the geometric center, namely the existence of the oscillation of swirling flow, which induces the flow parameter fluctuating and turbulence intensity increasing sharply, also leads to the unclear explain of some phenomena in the time-averaged flow field. Moreover, the dynamic effects of flow field are not taken into account in the gas-solid separation models, as a result, the separation performance calculation is not accurate enough. At present, the dynamic characteristics are mainly analyzed by experimental measurements, and the numerical simulation method is difficult to describe accurately due to the turbulence calculation model. It is necessary to study the dynamic characteristics of the flow field in a cyclone for developing high efficient and low pressure drop cyclone or improving the separation performance.

A conditional scenario based approach was proposed for the optimization of tactical level petrochemical supply chain with uncertain product demands and their prices. Based on the probability distributions of the stochastic variables, estimation on the parameters for the probability of each scenario was conducted, and a series of discretized scenarios were introduced to approximate the continuous optimization problem, and a scenario based two-stage mixed integer linear programming (MILP) model was formulated. Result of this optimization tended to approach the continuous optimization when the number of scenario increased, and based on this rule, a method to find the optimal number of scenarios was proposed, so balance between the calculation accuracy and computation time was achieved. Conditional scenario method was further introduced with regard to the correlation of two stochastic variables. Results showed that, compared with traditional method with no variables correlated, the conditional scenario based stochastic optimization method could find the optimal number of scenarios more quickly, and effectively reduce the computational effort.

The efficiency and dynamics of degradation TMP with UV, oxone and UV/oxone processes were investigated in this study. The efficiency and model of four factors and three levels with response surface curve method were explored to investigate the effect of HCO₃ ^-、Cl^-、NO₃ ^- and pH on degradation TMP. Furthermore, four kinds of real source water were applied to evaluate the difference between the real degradation value and the modal predication value. Finally, the degradation efficiency of three processes were compared. The results showed that only 5.5% and 62% of TMP were degraded by UV and oxone alone. However, the degradation rate of UV/oxone process can reached 93.2%, which fitted the pseudo-first-order reaction equation, and the first-order reaction rate constant (K) was 0.1768min^-1. The second-order reaction rate constant of ?SO₄ ^– and TMP was 2.07×10⁸L/(mol·s) with relative rate method. The regression equations of UV/oxone degradation TMP with RSM was obtained, the corresponding p value was less than 0.0001, the lack of fit was not significant (0.9726 > 0.05), R ²= 0.82 > 0.8, which indicated that the model was reliable. The actual degradation value and the model prediction value were similar during actual water basic degraded. UV/oxone was a highly efficient, rapid and feasible degradation process under the same degradation rate.

Aiming at the key problems in the engineering enlargement of technology for seawater potassium extraction by zeolite, the flow field in the large ion-exchange columns filled with zeolite was simulated by Fluent software with the porous medium model. The influence factors on flow field were studied, including porosity, particle diameter, inlet velocity, length-to-diameter ratio, the pit formed by seawater, and so on. The results showed that the porosity and particle diameter are directly related to the velocity distribution of the fluid in the zeolite layer, while the inlet velocity, length-to-diameter ratio and other conditions have no significant effect on the fluid flow. In addition, under the condition of constant porosity and particle diameter, the pit impacted by seawater has a great influence on the fluid in the zeolite layer by forming retention zones on both sides of the pit, which will affect the adsorption of zeolite for potassium in the seawater. Finally, according to the simulation results, the filling materials, equipment structure and process parameters were optimized. This study provides a theoretical support for the further enlargement of the seawater potassium extraction technology.

For the purpose of achieving electric field demulsification and pre-dehydration of the high oil concentration O/W emulsion, a static sequence batch experimental device used for demulsification and pre-dehydration was designed, which is based on the working principle of electrocoagulation technology. The physicochemical properties of the emulsion were characterized quantitatively to ensure its stability. Considering the pre-water removal rate as the main evaluation index, the effect of electric field form, peak voltage, pulse frequency, duty cycle, power-on time and water content on the static demulsification and pre-dehydration properties of O/W emulsion was studied systematically. The results showed that a better degree of demulsification was available under the pulsed DC square wave electric field than the DC electric field. Decreasing water content can weaken the degree of demulsification of the O/W emulsions, and there was an optimal value of peak voltage, pulse frequency and duty cycle respectively. The pre-water removal rate of O/W emulsion with 90% water content can reach 87.18% applying pulsed DC square wave electric field, in the conditions of 40V peak voltage, 2kHz pulse frequency, 0.5 duty cycle and 30min power-on time. Furthermore, on the basis of the observations for the experimental phenomena, the demulsification and pre-dehydration mechanism of high-oil O/W emulsions includes double electron layer action and similar electrocoagulation.

A three-dimensional numerical simulation for the nucleate boiling of a single bubble on a micropillar array is carried out. The Volume of Fluid model (VOF) is used to accurately capture the vapor-liquid interface coupling with an adaptive refinement for interface grids. With consideration of two parts evaporation at the vapor-liquid interface and at the microlayer, the bubble dynamics, temperature evolution and heat transfer performance for the single-bubble boiling on a micropillar array are obtained. As results, the departure time is 1.79ms which indicates that the micro-pillar structure promotes the bubble departure, which bubble deformation is accurately characterized by the diameter evolutions in the horizontal and vertical directions, and accordingly changes of the thermal boundary layer and wall surface temperature are shown. As to two parts evaporation, the micro-layer evaporation accounted for 52% of the total evaporation in bubble growth period. After t=0.95ms, accompanied by the disappearance of the microlayer evaporation, the vapor-liquid interface evaporation maintains a relatively stable value (0.1-0.2W) until the bubble departure. These various characters showing in different stages could offer a guidance on more accurate time division and establishing nucleate boiling heat transfer model for the single bubble nucleate boiling process at low heat fluxes.

An in-situ spiral separator was designed to sand removal and purification NGH to solve the problems of equipment wear, reservoir collapse and so on, based on the solid fluidization method and combined with the physical properties of mixed slurry. Then the effects of inlet velocity and inlet NGH volume fraction on the flow field and performance of the spiral separator were studied by CFD. It is obtained that as the inlet velocity increases, the velocity of the fluid in the flow field increases dramatically, especially the tangential velocity, and separation efficiency also increases, and the all separation efficiencies are more than 70%. At the same time, the pressure drop also increased sharply which leaded to sharply increase energy consumption in separator. As the increase of inlet NGH volume fraction, the flow field in the spiral separator hardly changed, the separation efficiency of NGH reduces, the sand separation efficiency increases, and the all separation efficiencies are above 70%. The pressure drop also gradually reduces. The results indicates that the separator has excellent sand removal performance. The tangential velocity is the critical velocity that determined the separation performance of the separators, which demonstrated that the increase of separator capacity is beneficial to the purification of NGH. The NGH concentration in gas hydrate reservoir has a certain influence on the efficiency of the separator. However, the separator also has some adaptability of the NGH concentration changes. The results also reveal the separation mechanism of NGH downhole spiral separation and provide a certain basis for the design of the spiral separator, and a novel technology and equipment for sand control in the exploitation of marine hydrate reservoirs is proposed.

A two-step method was used to prepare Al₂O₃/water of nanofluids at mass fraction of 0.5% and 1.0%. This work focuses on the effect of mixture ratio of 20nm and 50nm Al₂O₃ nanoparticles on the thermal conductivity and viscosity. Moreover, the comprehensive heat transfer of Al₂O₃/water of nanofluids was estimated by c _μ/c _λ and Mo in the real heat transfer process. The experimental results showed that the effect of the cluster size on effective thermal conductivity and viscosity is obvious. Al₂O₃/water of nanofluids with mass fraction of 1.0% and mixture ratio of 50∶50 exhibited the largest enhancement of effective thermal conductivity while the relative viscosity was the lowest with mixture ratio from 40∶60 to 60∶40. The reason is that the smaller clustering size of order enables nanofluids to reduce sedimentation rate indicating the dispersion of nanofluids. Thus, the formation of a localized particle-rich zone creates high-conductive percolation path of lesser thermal resistance compared to a particle-free zone, which forms “50nm-20nm-liquid layered structure” and results in enhancing thermal conductivity. Lastly, the suitable areas for nanofluids applied in laminar flow were the temperature range from 25℃ to 50℃ and mixture ratio of 40∶60 and 50∶50 at mass fraction of 0.5 % and 1.0%. Moreover, the suitable areas for nanofluids applied in turbulent flow were the mixture ratio range from 40∶60 to 60∶40 and temperature higher than 40℃ at mass fraction of 0.5 %.

The traditional cyclonic classifiers with a top tangential air-solid inlet currently have low particle classification efficiency. For this problem, a new cyclonic classifier with middle tangential air inlets and feed tube was designed. The flow field characteristic and classification performance were investigated numerically and experimentally respectively. The simulated results showed that several vortexes were created in the classifier. The main flow was characterized by an upper upward vortex and a downer reverse-flow vortex. The secondary air formed another vortex with high tangential velocity near the wall and axial velocity at the center, which forms the washing effect for the fine particles mixed into the coarse fraction. The maximum axial velocity reached 16.5m/s. This secondary air enhances the dispersion of particles gathered near the wall due to the strong shear effect. The injection of secondary air had less effect on the tangential velocity of the main flow, but increased the central axial velocity with a maximum increasing rate of 100%. Thus the fine particle residence time chould be shortened. The primary and secondary air occupied the separated space with an obvious dynamic border despite of the air inlet velocities, which provided steady centrifugal field for the particle classification. The experimental results showed that the new classifier had a maximum Newton efficiency of 88% and the minimum K value of 1.84 when the secondary air volume accounted for about 20% of the total air volume and the primary and secondary air velocity was 14m/s and 20m/s respectively, indicating that the new cyclonic classifier has good classification performance.

Experimental study on the heat transfer characteristics of ultra high parameter CO₂ in a vertically upward pipe was carried out. The experiment of CO₂ heat transfer was performed in a 10.0mm inner diameter tube, covering ranges of p=8.21—20.6MPa, q _w=95—300kW/m² and G=1000—1232.5kg/(m²·s). The effects of inlet temperature, pressure and heat flux on heat transfer were analyzed. Results showed that, under certain conditions of heat flux, pressure and mass flux, the inlet temperature has obvious effect on heat transfer. When the T _in<T _pc, wall temperature exists a local peak value ahead of the pseudo-critical point. Temperature increases largely and then decreases as the bulk enthalpy increases, which indicates heat transfer deterioration occurs. However, the wall temperature increases monotonously when the T _in>T _pc, no obvious peak wall temperature was observed. This means heat transfer deterioration was found to occur only in the region of T _in<T _pc. In the region of T _in>T _pc, pressure and heat flux have little effect on heat transfer, it follows single-phase forced convection heat transfer. The results showed that the heat transfer coefficient and wall temperature calculated by the classical D-B single-phase turbulent convection formula have achieved satisfactory prediction accuracy.

The separation of aromatic components is one of the key technologies for the utilization of coal-derived oils，and the distribution and composition of aromatic components in coal-derived oils is conducive to the development of the separation technology of aromatic components. In this paper，the separation methods of mixed aromatic components in coal-derived oil by distillation，solvent extraction，column chromatography and other methods，as well as the purification techniques of single aromatic components by distillation，crystallization，supercritical extraction，membrane separation，chemical method and adsorption method were introduced respectively，and the advantages and disadvantages of each separation method were also compared objectively．The main methods of aromatics composition and structure identification，such as gas chromatography，liquid chromatography，multidimensional chromatography and ultraviolet spectrophotometry were reviewed. The development trend of isolation and identification of aromatic component were discussed，the article pointed out the aromatic components of fine separation should be in-depth study of the interaction between the components，low energy consumption，environment-friendly new separation technology with traditional methods，the combination of aromatic components of appraisal should be a variety of characterization methods，the combination of multi-level and comprehensive analysis of its structure.

CO₂ electro-catalytic reduction reaction can realize carbon resources conversion, which is the key to achieve global “carbon cycle” and to alleviate many environment problems originated from excessive CO₂ emissions. On this account, research progress in the CO₂ electro-reduction reactors is reviewed in this paper. the structure, mass transfer characteristics and CO₂ conversion activity and selectivity of the reactor and its matching cathode are compared and analyzed according to the different electrolytes. It is suggested that the major progress of the reactor locates in the membrane electrode assembly type (MEA-type) electrolytic cell. The optimization of electrolyte materials depends not only on its ion selectivity and conductivity, but also on the properties of electrocatalytic materials and membrane electrode efficiency. Finally, process intensification technology in the MEA-type electrolytic cell as well as the matched self-supporting cathode are regarded as the potential research direction in the CO₂ electro-reduction reactors.

CO₂ capture, transportation, utilization and storage (CCUS) has become an effective method for mitigating greenhouse gas emissions. In the actual engineering problems, due to the existence of random variables such as temperature, pressure, carbon price and electricity price, it has brought great difficulties to the modeling and optimization of CCUS. In order to solve this problem, this paper a whole-process engineering-economic model of CCUS was established, which takes flue gas inlet flow, pipe inlet pressure, pipe diameter, number of pumping stations and injection well inlet pressure as decision variables, and quality constraints, emission constraints, transportation constraints and storage constraints as constraints. A stochastic optimization expectation model was proposed by using the whole-process CCUS cost as objective function. The genetic algorithm based on stochastic simulation was used to solve the expectation model. Through the reasonable parameters optimization and configuration, the proposed optimization method could solve the stochastic optimization problem in the whole-process CCUS. Results showed that the optimization method can effectively reduce the cost of the whole-process CCUS and provide a reference scheme for the development of this technology.

Theoretical analysis of a solar drive methane dry reforming energy storage system was performed based on the first and second laws of thermodynamics, and the energy storage efficiencies of the system with different solar intensity and inlet mole ratios were studied. Species compositions of solar reactor was calculated via equilibrium constant method. Then variation of feed gas conversion, selectivity, work efficiency and energy conversion efficiency under different conditions as well as the influence of side reactions on energy conversion were studied based on the established theoretical model. The results showed that the increase of feed mole ratio of CO₂ to CH₄ could improve the conversion of methane, selectivity, work efficiency and energy conversion efficiency. Reactor temperature would significantly affect the thermochemical storage properties of the system. With lower temperature (923—1123K), more side reactions would happen; and with higher temperature (>1123K), side reactions would be gradually suppressed, leading to less carbon deposition, higher work efficiency and energy conversion efficiency. Work efficiency and energy conversion efficiency reached their peak value at 1123K. After this temperature (>1123K), radiation loss increased significantly, and work efficiency and energy conversion efficiency decreased with the increased temperature. Since sides reactions were obviously suppressed under high temperature region (>1200K), the efficiencies of complex reaction system tended to be consistent with the single reaction system, which meant that the side reaction had no effect on the performances of the whole system.

Sulfated zirconia solid acid (SO₄^2-/ZrO₂) provides the great potential as a new-generation catalyst for light paraffin isomerization, which combines the high catalytic activity, regenerability with the environmental-friendly character. The progresses of industrial application of light naphtha catalyzed by sulfated zirconia are summarized, including the current market situation, commercial technologies and technical economy. The research progresses on the catalyst preparation technologies reported in the patents and literature are also reviewed. The effects of crucial preparation parameters on their influences on the catalysts structure and isomerization performance are deeply discussed, including precipitation and calcination conditions of precursor, the addition and modification of promoters, pretreatment conditions of catalysts and influence of water content of raw materials. Finally, the challenges of catalyst preparation and industrialization are analyzed and the corresponding suggestions are given. We also propose the future direction of the catalysts development, that is to broaden the adoption of raw materials, develop the new synthesis techniques and promoters, and the catalyst regeneration technology.

Carbon monoxide as one of the potential reducing agents for removing nitrogen oxides, is widely present in sintering, pellet, coking flue gas and automobile exhaust. The application of CO-SCR technology to simultaneously remove CO and NO is one of the ideal scheme for flue gas treatment. At present, the catalysts studied in the NO-CO reaction are noble metal catalysts, but they are difficult to apply in industry due to their high price, high temperature deactivation and poisoning. In this paper, the recent researches of NO reduction by CO over metal oxide catalysts are systematically reviewed and summarized. The research progress of preparation methods, doping modification and reaction conditions of Fe based, Ce based, Co based and Cu based catalysts are analyzed, and the capability of water and sulfur resistance have been investigated. Analyzing the mechanism of CO-SCR reaction, and researching the influence of the presence of O₂, which are evaluated on the NO reduction performance of the catalysts, in order to providing theoretical reference for the study of metal oxide catalysts.

Recently, the research of iron-based catalysts for synthesis of light olefins from syngas has attracted much attention, but the active phase of the catalysts is controversial. However, it is generally accepted by many researchers that iron carbide is the active phase in Fischer-Tropsch to olefins (FTO). In the paper, the recent research on active phase iron carbide is summarized, and the effect preparation methods, reduction gas, carburizing temperature on iron carbide are emphatically described. In addition, this work elaborates the effect of iron carbide and the crystal facets exposed on the catalyst surface on the catalytic performance and product distribution in FTO process. Therefore, the key point of the future work will focus on further preparation and research the regulation of iron carbide with different structures to the target products. In addition, the research of the effect of iron carbide crystals on the distribution of products is also an important problem to be solved by researchers in the future.

CO₂ is main greenhouse gas. In recent years, with the vigorous development of industry, CO₂ emissions are rapidly increasing and seriously affecting our living environment.CO₂ conversion into valuable chemical products has attracted extensive attention in the field of research. The synthesis of dimethyl carbonate (DMC) from CO₂ and methanol can not only reduce CO₂ emissions but also produce valuable green products of DMC. In this paper, the factors effecting on CO₂ conversion are summarized as follows: thermodynamic constraints and difficulty in CO₂ activation. The common metal oxides of ZrO₂, CeO₂ and composite metal oxides with acid-base active centers are significantly introduced from the catalytic performance and reaction mechanism. The main reasons of affecting the catalytic activity are analyzed, which originated from Lewis acid-base sites and Br?nsted acid sites. The future research directions for developing efficient metal oxide catalysts are proposed: adjusting the crystal phase and morphology of catalysts, increasing oxygen vacancies and hydroxyl functional groups, doping alkaline or acidic species, and adding dehydrating agents to the catalytic system. At last, it is pointed out that the stability of CO₂ molecule is difficult to be activated, and the mechanism of activation of CO₂ molecule should be further studied to improve the conversion of CO₂.

Hierarchical mordenites were synthesized by using dodecyl dimethyl benzyl ammonium bromide as templates and used as support for the vanadium based catalysts for iso-butane dehydrogenation reaction. The structural and acid properties were investigated by XRD, N₂ adsorption, SEM and NH₃-TPD. According to the characterization results, the specific surface areas and total pore volumes of the vanadium based increased due to the introduction of mesopores which were in the range of 2—3nm. Besides, the weak acid sites increased on the hierarchical mordenites supported vanadium based catalysts while the medium-strong and strong acid sites decreased as well as the crystallinity. The catalytic tests results of iso-butane dehydrogenation showed that the iso-butene selectivity largely increased due to the improved mass transfer efficiency and decreased strong acid sites although the iso-butane conversion slightly decreased. The side reactions were also prohibited and the condensation degree of the coke formed during the dehydrogenation process decreased. The optimized addition catalytic performance was obtained over the V-MOR-2 sample.

CaC₂ is a commodity chemical, and is of potential use in some alkaline catalyzed reactions. The synergetic activation effect of CaC₂-CsF for the reaction of cyclohexanone (CYC) and acetonitrile (ACN) was reported for the first time. The effects of reaction time, temperature and dosage of activating agents on the reaction were investigated. The results show that the reactivity of CYC is enhanced by the strong complexation between CsF and CYC, and the nucleophilic reactivity of ACN is enhanced via its deprotonation by the strong basicity of CaC₂. The reaction proceeds efficiently at mild conditions under synergetic action of CaC₂ and CsF, yielding 1-cyclohexenylacetonitrile (1-CAC) and acetylene simultaneously. The present method is much superior to the reported other synthetic methods , 97.5% of CYC conversion and 87.9% of 1-CAC yield can be obtained in 3h at 100℃ (n _CsF∶n _CaC2∶n _CYC∶n _ACN=1∶5.7∶10∶35.5). This study provides a novel method for the efficient synthesis of 1-CAC, and the result is instructive for the utilization of CaC₂ as a strong base in promoting the reaction of ACN with other carbonyl compounds.

Covalent organic frameworks (COFs) that are composed of organic building blocks connected with reversible covalent bonds are a type of newly emerging porous materials with high crystallization and well-defined periodicity. As a result of their large surface areas, low density, versatile tunable structures, excellent thermal stability, and easily modified channels, COFs have received increasing attention in recent years. This review summarized the research advances on COFs in the past decade by classifying them based on the substrate materials. The application and development of COFs were introduced, such as energy storage, photoelectricity, catalysis and biomedicine, including gas adsorption and storage, the photoconductivity of materials, the performance of catalytic reactions, the chiral separation and sustained-controlled release of drugs, etc. The characterization of COFs structure and the superior feature compared with other materials were discussed. The paper points out that the future development trend of COFs is to synthesize functional materials with high stability, controllable structure and low cost. Finally, the practical application prospects of COFs will be given.

Polyvinylidene fluoride (PVDF) is the most commonly used membrane material in membrane bioreactor (MBR) technology. However, PVDF membrane is facing some bottlenecks such as membrane fouling and low permeates flux due to the hydrophobicity of PVDF materials. Therefore, hydrophilic modification of PVDF membrane materials is a hot research topic in recent years. In this review two typical modification methods like membrane coating and grafting of PVDF membrane materials are introduced firstly. Then, with the development of nanotechnology, the hydrophilic modification methods such as the inorganic composite materials including carbon material graphene oxide(GO), inorganic antibacterial material nano silver particles and TiO₂ nanoparticles for functional preparation of PVDF membrane materials are also summarized. With the advantages of straightforward preparation processes, easy to control and broad selectivity of modification materials, MBR systems with new PVDF membranes exhibit great potential in industry, not only for wastewater treatment and re-utilization, but also for the production of bioenergy.

Coal bed methane is abundant in China, and the gas deoxidants has been widely concerned. This paper describes three deoxidation mechanisms including combustion deoxidation, catalytic oxidation and chemical absorption. The preparation processes, deoxidation mechnisms and state-of-the-art of gas deoxidants, including noble metals, copper, iron, manganese, molybdenum and porous ceramic materials, are described. By comparing the preparation cost, deoxidation effect, post-treatment procedure, some advantages and disadvantages are pointed out. The deoxidation effect of noble metal deoxidizer is the best, but it needs methane and hydrogen, and leads to the production of CO₂/H₂O. The non-precious metal deoxidizer is cheap, but the deoxidation effect is slightly poor, and the operational temperature is relatively higher. And the non-metal deoxidation can refrain from sulfur poisoning. Finally, according to the characteristics of the deoxidants, two promising research topics are proposed: non-metal deoxidation, complex deoxidants with high adsorption and catalytic performance.

Phosphorus is the main limiting factor of eutrophication in water body. The suitable method of phosphorus removal is of great significance in controlling eutrophication of water body. Adsorption is an economical, efficient and simple method for phosphorus removal. However, how to select suitable adsorption materials is the key to its application. The application of lanthanum to the modification of conventional adsorption materials can improve the performance of phosphate adsorption and the utilization efficiency of lanthanum. In order to further promote the development of phosphate removal by lanthanum modified adsorption materials, the related research on the application of lanthanum modified adsorption materials to phosphate removal in water is summarized, and the properties of lanthanum modified adsorption materials for phosphate removal are introduced. The mechanism of phosphate removal by lanthanum modified adsorption materials, the main influencing factors and the characteristics of desorption phosphate are analyzed. Meanwhile, it is suggested that in the future research, the lanthanum modified adsorption material with high efficiency and high selectivity for the removal of phosphate in real water should be prepared, and its mechanism of preparation and removal phosphate should be studied, and the suitable method of desorption phosphate of the adsorption material should be found out. The economic benefits of desorption and recycling of adsorption materials are evaluated.

Ferro-phosphorus was used as the iron source and the phosphorus source and the ferro-phosphorus was dissolved in the mixture of nitric acid and sulfuric acid, and battery-grade nano-iron phosphate was prepared by precipitation method. The influence of the concentration of nitric acid, the reaction time and temperature on the dissolving rate of ferro-phosphorus was studied. The effects of the ratio of iron and phosphorus, reacting temperature and pH on the performance of the FePO₄ were also explored. The crystal morphology, structure and chemical composition of the prepared nanoscale iron(Ⅲ) phosphate were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetric, differential scanning calorimetry (TG-DSC), infrared spectrometer, and inductively coupled plasma atomic emission spectrometer(ICP-AES). Experimental results show that the optimum experimental conditions for the dissolving of ferro-phosphorus areas follows: nitric acid concentration 1.5mol/L, reaction time 4h, reaction temperature 90℃, under which the dissolution rate of iron phosphate is 95.1%. The optimal conditions for the preparation of iron phosphate are: iron-phosphorus ratio 1∶1, reaction temperature 60℃, reaction pH 1.0. XRD and SEM analysis showed that the prepared FePO₄ had high crystallinity, and regular morphology, uniform particle dispersion, its primary particle size is around 100nm. The iron and phosphorus content test shows that the molar ratio of iron to phosphorus was 0.97. The content of impurity elements meets the requirement of battery grade FePO₄ precursor.

Silica gel was prepared by sol-gel method with Na₂SiO₃ as silica source. Cu²⁺/Tb₂O₃ antibacterial silica gel was prepared by dip and absorption. The materials was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. The results showed that Cu²⁺/Tb₂O₃ antibacterial silica gel structure was fluffy and porous. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration ( MBC ) of the samples were tested by antibacterial examination. The results indicated that the addition of rare earth terbium was advantageous to the bacteriostatic and bactericidal of antibacterial silica gel. The Ion release, surface area and CuO grain size of the antibacterial silica gel were investigated. The Ion release and surface area in the material increased from 7.22mg/L to 11.82mg/L and 115.5m²/g to 129.3m²/g after the addition of cerium ions, respectively. The CuO grain size in the material reduced from 107nm to 76nm after the addition of cerium ions. The relationship between rare earth terbium and the improvement of antibacterial properties was preliminarily analyzed.

The binary organic composite phase change material was prepared by melt blending method with capric acid (CA) and hexadecanol (H) as raw material. The optimum mass ratio of capric acid-hexadecanol (CA-H) binary composite phase change material equated to 74∶26, eutectic temperature and super-cooling degree up to 24.5℃ and 0.2℃ was determined with cooling curve method. The structure and properties of CA-H composite phase change materials were characterized by fourier transform infrared spectrometer (FTIR), X ray diffractometer (XRD), heat storage and exothermic experiments and accelerated thermal cycling experiments. It was found that the characteristic absorption peaks of CA and H coexisted in FTIR curve of CA-H, and the diffraction peaks of CA and H coexisted in XRD spectra of CA-H, indicating that CA and H were combined by molecular forces without chemical reaction. After 500 thermal cycles between 5℃ and 80℃, the change of the phase transition temperature and latent heat were not significant. It showed that CA-H had better thermal stability, and heat storage and release performance were good. According to the differential scanning calorimeter (DSC), the phase change temperature and the corresponding latent heat of CA-H were 24.22℃ and 190.5J/g respectively, which was consistent with the eutectic temperature measured by cooling curve. Therefore, the CA-H composite phase change material was suitable for building energy conservation, condensation heat recovery of air conditioning and low temperature solar energy heat storage.

Using N-isopropylacrylamide (NIPAM) and chitosan (CS) as functional co-monomers and bovine serum albumin (BSA) as template protein, a temperature/pH dual-responsive protein imprinting polymers was prepared on the surface of modified SiO₂. The results of TEM, FTIR and TG results showed that the imprinted layer had been successfully grafted. The temperature/pH dual-responsive, adsorption capacity, adsorption kinetics, specificity, competitive adsorption and repeatability of the polymer were systematically studied. The results showed that the swelling rate and adsorption capacity of imprinted polymer (MIP) were greatly affected by temperature and pH. MIP shrank at high temperature and alkaline condition, and swelled at low temperature and acid condition. At pH 4.6 and 35℃, the optimized adsorption capacity of MIP for 0.6mg/mL BSA was 83.74mg/g, meanwhile the best imprinting time was 4h and the imprinting factor was 2.02. In addition, MIP had good specificity and competitive adsorption. After five repetitions, the adsorption capacity still maintained 88%, indicating good repeatability. This new temperature/pH double-sensitive protein molecularly imprinted synthesis method is simple and has a good application prospect in protein separation and recognition.

A simple and mild approach for the synthesis of hydrophobic palladium nanomaterials using palladium acetate as a precursor and hydrosilane as a reducing agent was developed. Hydrophobic Pd nanoclusters and spherical Pd nanoparticles were prepared in chloroform at room temperature by adjusting the molar ratio of precursor, protective agent and reducing agent, respectively. Transmission electron microscope (TEM), optical contact angle tester, X-ray diffraction (XRD), cyclic voltammetry (CV) and surface enhanced Raman scattering (SERS) were employed to characterize the obtained palladium nanomaterials. TEM images displayed that the two Pd nanomaterials had uniform particle size distribution and good dispersion, and the contact angle measurements showed that both Pd nanoclusters and Pd nanoparticles were hydrophobic. CV tests indicated that the Pd nanoclusters exhibited more notable electrocatalytic performance than spherical Pd nanoparticles for ethanol oxidation, and the two Pd nanomaterials demonstrated good electrocatalytic stability, showing that Pd nanoclusters possessed stable structures and larger specific surface area than spherical Pd nanoparticles. The Pd nanoclusters were found to be an excellent hydrophobic substrate for surface-enhanced Raman scattering. Hydrophobic carcinogens such as 3,4-benzopyrene and benzidine were detected via SERS using the Pd nanoclusters as a substrate. The limit of detection for 3,4-benzopyrene and benzidine was 0.1mg/mL.

Due to the advantages of non-toxic effects, high biocompatibility and easy biodegradation, chitosan nanoparticle drug-loading system has potential applications in various fields like biomedicine, chemical engineering and food industries. This paper mainly introduces the ionic cross-linking method, polyelectrolyte complex method and emulsification cross-linking method, spray drying method and solvent evaporation method commonly used in the preparation of chitosan nanoparticles, and the characteristics of these methods are summarized. In addition, this paper summarizes the application of chitosan nanoparticle drug-loading system in anti-tumor and antibacterial as well as hypoglycemic, hypolipidemic, osteoporosis and antiepileptic treatment drugs, in combination with recent research work of domestic and foreign scholars. Combined with multidisciplinary research, further development of chitosan nano drug-loading system intelligent controlled release, targeted delivery function and breakthrough of human special biological barrier will be the key research direction in the near future.

In order to improve the water solubility of berberine and increase its absorption and transportation in vivo, a series of nitrogen heterocycle functionalized berberines (4—6) were synthesized via demethylation of berberine followed by bromoalkylation and bromo-substitutions with benzimidazole, 1,2,4-triazole and pyrazole. Except for 6a, all the other compounds were new and had been characterized by ¹H NMR, ¹³C NMR spectroscopy and ESI MS spectrometry. Their water solubilities analyzed by ultraviolet spectrophotometry showed that the introduction of odd-number carbon chains functionalized with 1,2,4-triazole led to significant increases of the hydrophilicity. Among them, the 1,3-propylene bridged one had the highest solubility of 13.87 mg/mL, which is 11 times higher than that of berberine, making it a promising prodrug with high bioavailability.

A novel electrochemical sensor was constructed for detection of diethylstilbestrol (DES) based on molecularly imprinted polymer membrane on a glassy carbon electrode (GCE) modified with carboxyl-multi-walled carbon nanotubes (CMWCNTs) and Au nanoparticles (AuNPs). P-aminothiophenol (p-ATP) and DES were assembled on the surface of the modified GCE through the formation of Au—S bonds and hydrogen-bonding interactions, and the polymer membrane was formed by electropolymerization in a polymer solution containing p-ATP, DES, chloroauric acid and tetrabutyl ammonium perchlorate; and 50% ethanol-0.1mol/L sulfuric acid aqueous solution (1∶1，volume ratio) was used to elute template molecules. The imprinted effect and analysis performance of the sensor were researched by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), and the imprinted sensor was applied to rapid detection of DES in food. Under the optimal conditions, the linear response range of DES was 1.0×10^-9—1.0×10^-5mol/L, the limit of detection was 3.3×10^-10mol/L, the average recoveries were between 83.46% and 98.21%, and the relative standard deviations (RSDs) were between 1.01% and 3.74%. The sensor has the advantages of simple operation, rapid and sensitive detection, low cost, strong anti-interference ability and good stability, it is suitable for rapid detection of DES in real samples, and it has good application value.

In order to improve the photoisomerism of the stilbene type fluorescent brighteners and its adsorbability on the surface of high yield paper,fluorescent monomer named SFBs was firstly synthesized by using cyanuric chloride, 4,4'-diamino stilbene-2,2'-disulfonic acid ,diethanolamine and p-aminobenzene sulfonic acid as raw materils. Afterward, a novel stilbene type waterborne polyurethane emulsion with fluorescence (SWPU) was synthesized by using SFBs as chain extender. ¹H NMR,FTIR,UV-vis, fluorescence spectrum, stability analyzer and dynamic lights scattering(DLS) were employed to verify the structures and properties of SFBs and SWPU emulsion. The whiteness and physical properties of papers before and after coating by SWPU emulsion were compared systematically by ultraviolet light accelerated aging tests, tensile strength tests and water absorption tests, respectively. The results showed that the SWPU emulsion presented a narrow polydispersity , superior stability, and an average particle size of 66.78nm. The initial whiteness of paper coated by SWPU emulsion increased by 15.6%(ISO) as compared to that of uncoated, and declined by 13.39% (ISO) after 48 h UV accelerated irradiation, which was obviously lower than that of uncoated paper (declined by 17.56% ). Additionally, the tensile strength of the paper was enhanced and the Cobb index decreased after coating. Therefore, SWPU emulsion synthesized in this work exhibits excellent film forming, whitening and anti-yellowing ability simultaneously.

Condensable particulate matter (CPM) is vapor phase at stack conditions, but forms fine particle matter with diameter less than 2.5μm upon release into the ambient air. Researchers have paid more attention to filterable particulate matter (FPM) than CPM from stationary sources for a long time. Many countries didn’t determining CPM, which caused the underestimation of particle matter emission level and the imperfection of inventory. The existing researches indicate that the emission concentration of CPM from most stationary sources are not lower than FPM, whose effect for the ecological environment cannot be ignored. Nevertheless, at present the cognition of CPM is not enough. In this case, on the basis of limited research reports, formation mechanism, test method, emission level, characterization and control technologies of CPM are reviewed. CPM is mainly generated by vapor components through “heterogeneous condensation” and “homogeneous nucleation”. Impinger cooling method and dilution cooling method are the main determining methods of CPM. Researchers revealed that CPM emission is affected by sulfur content, exhaust gas temperature, pollutant control facilities and operating conditions, in which exhaust gas temperature is the most important influence factor. The physical form of granular CPM is spherical and with a porous surface. The emission CPM from most stationary sources mainly consists of inorganic components, whose major metal element are K, Na, Ca and major soluble ions are SO₄ ^2-、NO₃ ^-、Cl^-、NH₄ ⁺. Conventional particle control facilities have poorer removal efficiency for CPM than FPM. Nowadays, the research of CPM is severe inadequate. The future research of CPM may focus on the aspects like improvement of test method, the CPM characteristics from different stationary sources and the control of CPM.

The sorption enhanced steam reforming (SESR) hydrogen production is an new technology consisting of reforming reaction (H₂ production) and selective separation (CO₂ sorption). The technology is characterized by in situ removal of CO₂ by solid adsorbent at high temperature to change the normal equilibrium limit of the shift reaction, increase hydrocarbons conversion and H₂ production with reduced CO₂ emission. The selection of suitable sorbents and reaction conditions during sorption-enhanced steam reforming for high-purity hydrogen production is of vital importance.This study discussed the performances of CaO, hydrotalcite, Li₂ZrO₃, Li₂SiO₃ and bifunctional based sorbents during sorption-enhanced steam reforming for high-purity hydrogen production, while different methods for enhancing these sorbents activities were summarized. The factors of reaction conditions such as temperature, pressure, the amount of water vapor etc. and related reaction mechanisms using these solid sorbents are identified. The results show that CaO-based adsorbents are considered to be the most potential adsorbents due to their low cost and high adsorption capacity. Nevertheless, the deactivation of CaO during multi-cycles carbonation-regeneration is challenging for continuous long-term operating conditions for hydrogen production from catalytic steam reforming. However, in the process of hydrogen production by SESR, CaO-based adsorbents are facing the challenge of attenuation of adsorption capacity after multi-cycles carbonation-regeneration. The multifunctional sorbent-catalyst materials having a dual function of catalytic steam reforming and in-situ CO₂ removal has great advantages in SESR because they can overcome the problems related with handling of different solids of catalyst and sorbent and decrease the cost of the total solid material used. What’s more, the multifunctional sorbent-catalyst materials will become an important direction for future research in this field.

Sulfur oxides produced by sulfur compounds in fuel during combustion at high temperatures are one of the main pollutants in the atmosphere, which have great harm to the environment and human health. In this review, the common methods developed for fuel desulfurization have been introduced, and the research progress of adsorption desulfurization technology has been emphasized. Firstly, the current status on the development of various kinds of adsorbents for desulfurization has been introduced, including activated carbon, metal-organic framework, surface molecularly imprinted polymer, as well as inorganic adsorbents. The retention capacity, selectivity, influencing factors of adsorption have been analyzed in detail. The desulfurization mechanisms of different adsorbents are summarized. The regeneration methods for different adsorbents, and the adsorption effects after regeneration are summarized and evaluated. The advantages and disadvantages of these adsorbents are compared and summarized. Finally, the existing problems of adsorption desulfurization are introduced. It is pointed out that the development of adsorbents with high regeneration ability, as well as high selectivity for sulfur-containing organic compounds in the presence of non-sulfur compounds is the future research trend.

The direct synthesis of dimethyl carbonate from carbon dioxide and methanol is limited by thermodynamic equilibrium, resulting in the lower reactant conversion and product yield, which greatly hinders its industrial application. The coupling of dehydration system can remove the water generated in the reaction process timely, and promote the reaction forward, and then improve the yield of dimethyl carbonate. According to the principle of the coupled dehydration system, it can be mainly divided into physical dehydration system and chemical dehydration system. This paper mainly reviews the recent research progress of various physical dehydration processes and chemical dehydrating agents for the synthesis of dimethyl carbonate from CO₂ and methanol. The dehydration principles of different systems and their promoting effects on the reaction are discussed in detail. The advantages and limitations of different dehydration systems are summarized and analyzed. It is proposed that the reaction process should be optimized or a new design should be made. Exploring the chemical dehydrating agents which are cheaper, less toxic and easy to recycle are the main development trend of the coupled dehydration system in future.

The activated carbon slit pore model of 0.902nm, 1.997nm, 3.000nm and 4.000nm pore size was established by the Materials Studio software. The adsorption data of volatile organic compounds (VOCs: isohexane, benzene, toluene, acetone, and methanol) was simulated by the method of Grand Canonical Monte Carlo (GCMC) simulation. The effect of changes on the adsorption performance of VOCs guides practical applications. The simulation results showed that the adsorption of VOCs by activated carbon is affected by the pore size and adsorption energy. Under the saturated vapor pressure p₀ of 293.15K, the affinity between the adsorbents decreases with the increase of the pore size. The pore size of activated carbon increased from 0.902nm to 4.000nm, and the saturated adsorption capacity of isohexane, benzene and toluene increased gradually, while the adsorption capacity of 4.000nm pore size activated carbon to acetone was less than 3.000nm, and the adsorption capacity of 3.000nm and 4.000nm pore size activated carbon to methanol was less than the 1.997nm. In the industrial waste gas VOCs adsorption recovery, the choice of 0.902—1.997nm pore size activated carbon can achieve the best results.

The biochars for adsorption of heavy metal (Zn) in solution were prepared by pyrolysis of water hyacinth (WH) and corn straw (CS) at 300—700℃. The effects of biomass species, pyrolysis temperature, initial pH and initial Zn(Ⅱ) concentration on Zn(Ⅱ) adsorption over biochars in solution were investigated, and the adsorption kinetics model was obtained based on the adsorption experiments. The results showed that the physicochemical characteristics were changed obviously with the increase of pyrolysis temperature, that is, the contents of volatile oxygen, hydrogen, O/C ratio and H/C ration of biochars decreased significantly; the contents of ash, fixed carbon and low heating value increased remarkably; the parameters of specific surface area, total pore volume, micro-pore volume, pH , and salt material of KCl increased significantly. The Zn(Ⅱ) adsorption capacity over biochar presented a trend of rapid increase followed by gradual stabilization or slight decline with increasing the initial pH, and the maximum equilibrium adsorption capacity of different biochars was obtained at pH=4—6. The Zn(Ⅱ) equilibrium adsorption capacity over biochar presented rapid linear increase with increasing initial Zn(Ⅱ) concentration while the initial Zn(Ⅱ) concentration was less than 30mg/L, however, the increase trend of Zn(Ⅱ) equilibrium adsorption capacity slowed down while the initial Zn(Ⅱ) concentration was larger than 30mg/L. The Zn(Ⅱ) equilibrium adsorption capacity increased gradually with increasing pyrolysis temperature at the same initial Zn(Ⅱ) concentration, and the Zn(Ⅱ) equilibrium adsorption capacity over WH biochar was significantly larger than that over CS biochar prepared at the same pyrolysis temperature. The adsorption kinetics of Zn(Ⅱ) on two biochars in solution was in accordance with Lagergren pseudo-second-order model, which was mainly controlled by chemical adsorption. The adsorption mechanism of Zn(Ⅱ) on WHC and CSC mainly involved the complexation of oxygen-containing functional groups and the precipitation of inorganic salt ions.

In order to apply activated carbon fiber (ACF) to air conditioning field to optimize the filtration of fresh air and improve the adsorption efficiency of ACF on polar molecule SO₂, ACF was modified by liquid phase oxidation to make polar fold-type complex filter，which were characterized by SEM、BET and FTIR. A direct air system test bench was established. The formaldehyde absorption-pararosaniline spectrophotometric method was used to detect the concentration of SO₂ before and after outdoor air enters the fold-type complex filter. The dynamic desulfurization efficiency of unmodified ACF and modified ACF with different initial SO₂ concentrations was studied quantitatively. The results showed that (1) after HNO₃ oxidation modification, the surface microstructure of ACF was significantly changed. The specific surface area, pore volume and pore diameter respectively decreased from 653.70m²/g, 0.43cm³/g and 2.64nm to 488.84m²/g, 0.32cm³/g and 2.58nm. The transmittance of O—H and C—O decreased from 96% and 95% to 65.5% and 75% respectively, namely the content of surface acidic oxygen-containing functional groups (hydroxyl, carboxyl and ether group) increased. (2) The average dynamic desulfurization efficiency of unmodified ACF and modified ACF at low SO₂ concentration was 33% and 75%, respectively, i.e., due to the enhancement of ACF surface polarity, the dynamic desulfurization efficiency was increased by 42%, which can be used in air conditioning filter to improve indoor air quality effectively.

Phenolic compounds have a wide range of sources. It is very difficult to remove phenolic compounds from wastewater under natural conditions. Phenolic compounds are highly toxic and have a serious impact on ecological environment and people's health. In the paper, the efficient ozone catalytic oxidation technology for organic wastewater treatment was selected to degrade and oxidate phenolic organic compounds by oxygen radicals, which produced by ozone aeration. The catalyst carriers were selected and optimized. A kind of porous materials with good hydrothermal stability and high physical strength was prepared. The active sites Fe₂O₃ was modified by these supports, which to synthesize a series of SBA-15 mesoporous materials on whose surface Fe₂O₃ film was enriched. The SBA-15 mesoporous materials had very good effect on catalytic oxidation of phenolic wastewater because of its large specific surface area, abundant porous structure and uniform active sites. The materials could run efficiently and steadily for 500h, with the catalytic activity above 83% under the reaction conditions: initial phenol solution concentration of 100mg/L (COD 238mg/L), hydraulic retention time of phenolic wastewater of 5min, quantity of flow 0.8L/h and ozone aeration rate of 2mg/min and 30g Fe₂O₃(5)/SBA-15 materials. Thus, mesoporous catalytic materials such as Fe₂O₃/SBA-15 have an industrial application potential in advanced treatment of phenolic wastewater.

The hydrocyclone separation technology has been widely used in liquid-solid separation and oil-water separation. Hydrocyclone separator of quench water and de-oiling hydrocyclone of wash water were studied separately in order solve the problems of methanol to olefin wastewater treatment. The hydrocyclone separator is used for the separation of catalyst particles in quench water. The de-oiling hydrocyclone is used for the separation of oil waxes in wash water. Our work are applied to the water treatment system of the DMTO unit with a capacity of 1.8 million tons/year in a chemical company. The quality of quench water and wash water had been monitored for a long term. The monitoring indicators were suspended solids content at the inlet and outlet of the hydrocyclone separator and oil content at the inlet and outlet of the de-oiling hydrocyclone. Industrial operation results show that the efficiency of the quench water first-stage hydrocyclone and the two-stage hydrocyclone can reach 50% and 80% respectively. The hydrocyclone separator effectively clarifies the quench water, and the external phase is effectively enriched. The separation efficiency of the de-oiling hydrocyclone can reach 60%,which effectively separates the oil waxes of wash water. The application of hydrocyclone separation technology reduces pipe and equipment blockage in water system, which ensures the stable operation of the device.

A flooded composite acid ferrous oxide column was constructed by using two kinds of filler. Under different ferrous concentrations, the long-term performance of ferrous oxidation in the oxide column and the effect of temperature were investigated. The results showed that the three sets of oxidation columns could be stably operated for a long time at the temperature of 26―36℃, when the ferrous load was 0.200gFe²⁺/(L·h), 0.325gFe²⁺/(L·h) and 0.825gFe²⁺/(L·h), respectively, and the average E_h in the effluent was 629mV, 620mV and 596mV, respectively. The relatively eutrophic low temperature resistant bacteria in the medium temperature and low load oxidation column were easy to grow, and after entering the low temperature stage, the oxidation column could maintain a relatively stable ferrous oxidation load of 0.200gFe²⁺/(L·h). In the medium temperature and high load oxidation column, the moderate temperature bacteria were easy to grow, and after entering the low temperature stage, the ferrous oxidation ability decreased obviouslyand its ferrous oxidation load was only 1/3 of the medium temperature.

Anhydrous tert-butanol (TBA) is an important chemical raw material. However, it can form a minimum azeotrope with water in industrial production, making it difficult to produce anhydrous TBA by simple distillation. In this article, the separation schemes for TBA dehydration of conventional two-column extractive distillation column (CEDC), extractive dividing-wall column (EDWC) and reactive distillation column (RDC) were proposed. In the design of CEDC and EDWC, the process was simulated via Aspen Plus software, and it was optimized with the total annual cost (TAC) as the target function to obtain the optimal operating conditions. In the RDC, multiple feeds of ethylene oxide (EO) were fed into the column, which could react with water and overcome the azeotropic equilibrium of TBA/water to obtain anhydrous TBA. Due to the complexity of RDC, the detailed sensitivity analysis of RDC was conducted to investigate the feasibility and potential of RDC in TBA dehydration. The computational results showed that the EDWC, compared with the CEDC, can reduce the energy consumption while increased 6.51 % of TAC due to the requirement of more expensive utilities. Therefore, the EDWC was not economically superior to CEDC. Conversely, the RDC exhibited great application potential for TBA purification since it could reduce 47.69% of energy requirement and 35.36% of TAC.

The penetration effect of explosive fragments on chemical storage tanks is extremely destructive. As an important means of risk pre-control in penetration accidents, the protective layer technology of storage tanks is still in its infancy. Research on military armor technology, the typical protective layer technology, is relatively mature, which can provide important reference for the development of protective layer of storage tanks. The related literatures on protective layer of chemical storage tanks and the military armor against penetration damage at home and abroad were systematically analyzed. Then the problems to be solved and the research direction to be further developed were put forward according to the research progress of armor technology. In the aspect of material selection, the application and coupling design of bulletproof metals, ceramics and some emerging materials should be considered. In terms of structural design, the ballistic experiment and numerical simulation were supposed to be utilized to study a series of key parameters such as the number of protective layers, thickness ratio, sequence of each layer and air gap etc., which affect the penetration resistance of the protective layer. By characterizing the probability of penetration accidents and the severity of the accident consequences, this review can be considered as the reference for the application of protective layer technology in risk pre-control of Domino effect accidents caused by explosive fragments in chemical industry park.

Ethylene oxide is a flammable, explosive, toxic carcinogen that can cause serious consequences in the event of a leak. The application of real-time continuous monitoring and early warning system is an effective means to prevent and control the leakage of ethylene oxide. The commonly used gas leakage consequences simulation software can only perform single-point offline prediction, and its model prediction results are difficult to apply to continuous monitoring and early warning. The identification of multi-parameter coupling relationship and the accuracy of quantitative calculation of its effect are the difficulties in monitoring and early warning. In this paper, a real-time monitoring and early warning model construction method for ethylene oxide reactor leakage was proposed to determine the range of parameters in the actual production of chemical process; based on the multi-parameters of unified dispersion model (UDM), orthogonal test simulation was used to calculate the diffusion and ignition of the ethylene oxide reactor after leakage; the correlations among pressure, temperature, leakage caliber, leakage height and environmental changes were analyzed based on the information of accident consequences and the main influencing factors affecting the consequences of the accident were verified as leakage caliber and leakage height. The quantitative prediction model of accident consequence was fitted based on regression of different accident consequence information data of main influencing factors. According to various process parameters of the actual leakage condition, the quantitative prediction model was used to calculate the accident consequences, and PHAST software was used to compare and verify the results of the continuous monitoring and warning model. The results show that the model is basically consistent with the calculation results of PHAST, and the error is within the allowable range. Finally, according to this method and the real-time monitoring and warning model, the real-time continuous monitoring and warning system can be constructed, and the multi-parameter collection can be changed in real time according to the actual production process to realize the real-time continuous monitoring and warning of leakage risk, thus providing technical basis for the accident warning and emergency rescue.