Study of Fugu coal catalytic gasification in CO2 atmosphere

doi:10.16085/j.issn.1000-6613.2016.11.016

Chemical Industry and Engineering Progress ›› 2016, Vol. 35 ›› Issue (11): 3491-3497.DOI: 10.16085/j.issn.1000-6613.2016.11.016

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Study of Fugu coal catalytic gasification in CO₂ atmosphere

YAN Xiaoxia, FU Ke, XU Xiaoyu, XU Long, MA Xiaoxun

Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, Xi'an Engineering Laboratory for Energy Efficient and Clean Chemical Utilization, College of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China

Received:2016-03-09 Revised:2016-05-30 Online:2016-11-05 Published:2016-11-05

府谷煤CO₂催化气化反应性的研究

闫小霞, 付柯, 许晓宇, 徐龙, 马晓迅

陕北能源先进化工利用技术教育部工程研究中心, 陕西省洁净煤转化工程技术研究中心, 西安市能源高效清洁化工利用工程实验室, 西北大学化工学院, 陕西西安 710069

通讯作者: 徐龙,教授。E-mail:longxuxulong@163.com。
作者简介:闫小霞(1991-),女,硕士研究生,研究方向为煤催化气化。E-mail:740923076@qq.com。
基金资助:
国家自然科学基金重点项目（21536009）、国家科技部国际科技合作专项子课题（S2013GR0064）及西安市科技计划项目（CXY1511（4））。

Abstract

Abstract: Adding appropriate proportion of catalysts can improve the coal gasification rate and reduce the initial gasification temperature．In order to study the effect of different anions (CO₃^2-、SO₄^2-、Cl^-) salts on the thermal weight loss process of FG coal, the CO₂ gasification experiments of coal were conducted in a thermogravimetric analyzer by loading eight kinds of catalysts (K₂CO₃, K₂SO₄, KCl;Na₂CO₃, Na₂SO₄, NaCl;FeSO₄, FeCl₂).And the loading amount of K⁺、Na⁺、Fe²⁺was 0.001 mol/g, respectively．In addition, the non-isothermal dynamic model was used to fit data．The experiment results showed that the catalysts exhibit weaker effect on coal-CO₂ low-temperature pyrolysis, while the catalysis was obvious in high-temperature gasification．For potassium and sodium salts, when kations were the same, the activity order was CO₃^2-＞SO₄^2-＞Cl^-．For the iron catalysts, the FeSO₄was observed to be superior to FeCl₂in catalyzing gasification．The dynamics results indicated that the apparent activation energy of coal with catalysts within the range of 169～232.6kJ/mol was consisted with the above rules．It was reduced in different degree compared to that of raw coal (267.9kJ/mol).

Key words: coal catalytic gasification, CO₂ atmosphere, kinetic

摘要： 加入适宜的催化剂可以提高气化反应速率，降低起始气化温度。为了研究不同阴离子（SO₄^2-、CO₃^2-、Cl^-）盐对府谷煤热失重过程的影响，利用热重分析仪对负载了8种催化剂（K₂CO₃、K₂SO₄、KCl；Na₂CO₃、Na₂SO₄、NaCl；FeSO₄、FeCl₂）的煤样进行了CO₂气化实验，其中每克府谷煤的K⁺、Na⁺、Fe²⁺负载量分别为0.001mol。同时采用升温动力学模型进行了数据拟合。实验结果表明：催化剂对煤与CO₂的低温热解并无明显的催化作用，而在高温气化阶段催化效果显著。对于钾盐和钠盐催化剂，当阳离子相同时，其催化活性顺序为：CO₃^2->SO₄^2->Cl^-。对于铁盐催化剂，FeSO₄的催化活性优于FeCl₂。动力学结果发现：负载催化剂煤样的活化能大小符合上述实验规律，分布在169～232.6kJ/mol之间，相比原煤（267.9kJ/mol）都有一定程度的降低。

关键词: 煤催化气化, CO₂气氛, 动力学

CLC Number:

TQ546.2

YAN Xiaoxia, FU Ke, XU Xiaoyu, XU Long, MA Xiaoxun. Study of Fugu coal catalytic gasification in CO₂ atmosphere[J]. Chemical Industry and Engineering Progress, 2016, 35(11): 3491-3497.

闫小霞, 付柯, 许晓宇, 徐龙, 马晓迅. 府谷煤CO₂催化气化反应性的研究[J]. 化工进展, 2016, 35(11): 3491-3497.

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Study of Fugu coal catalytic gasification in CO₂ atmosphere

府谷煤CO₂催化气化反应性的研究

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