Chemical Industry and Engineering Progress ›› 2021, Vol. 40 ›› Issue (S2): 117-125.DOI: 10.16085/j.issn.1000-6613.2021-1183

• Energy processes and technology • Previous Articles     Next Articles

Review of rapid generation methods of carbon dioxide hydrate

WANG Yingmei1,2,3,4(), NIU Aili1,2,3, ZHANG Zhaohui1,2,3, ZHAN Jing4, ZHANG Xuemin1,2,3   

  1. 1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
    2.Key Lab of Complementary Energy System of Biomass and Solar Energy Gansu Province, Lanzhou 730050, Gansu, China
    3.Western China Energy & Environment Research Center, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
    4.Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730050, Gansu, China
  • Received:2021-06-03 Revised:2021-06-23 Online:2021-11-12 Published:2021-11-12
  • Contact: WANG Yingmei

二氧化碳水合物快速生成方法研究进展

王英梅1,2,3,4(), 牛爱丽1,2,3, 张兆慧1,2,3, 展静4, 张学民1,2,3   

  1. 1.兰州理工大学能源与动力工程学院,甘肃 兰州 730050
    2.甘肃省生物质能与太阳能互补供能系统重点实验室,甘肃 兰州 730050
    3.兰州理工大学西部能源与环境研究中心,甘肃 兰州 730050
    4.中国科学院西北生态环境 资源研究院冻土工程国家重点实验室,甘肃 兰州 730050
  • 通讯作者: 王英梅
  • 作者简介:王英梅(1987—),女,博士,副教授,硕士生导师,主要从事气体水合物生成与分解动力学方面的研究。E-mail: wymch@lzb.ac.cn
  • 基金资助:
    国家自然科学基金(41661103);国家重点研发计划(2017YFC0307303);中国科学院冻土工程国家重点实验室开放基金(SKLFSE201406)

Abstract:

Gas hydrate has many advantages, but there is no large-scale industrial utilization. The most important problem is that the rate of carbon dioxide hydrate generation is slow, which hinders the application of hydrate technology. Therefore, the key to the successful application of gas hydrate technology is to maximize the rate of its generation. The most common method for the rapid formation of CO2 hydrate is to add accelerators, and different kinds and concentrations of accelerators have different effects on the formation rate of CO2 hydrate. Therefore, this paper mainly summarizes the rapid formation methods of carbon dioxide hydrate, from the kinetic accelerator, nanofluid and ionic accelerator analysis, respectively summarized their formation mechanism of hydrate. The effects of SDS sodium dodecyl sulfate, nano graphite and sodium chloride on the induced nucleation time, formation rate, phase equilibrium and surface tension of carbon dioxide hydrate were analyzed. Finally, it is pointed out that: There is an optimal concentration of a single accelerator, but it will change with the change of various factors such as temperature and pressure, and there is a synergistic effect when different kinds of accelerators are mixed, and the generation effect is better than that of a single accelerator. It is the key direction of future research to reveal the law of the influence of the most suitable single accelerator on hydrate formation at different temperatures and pressures and to find out the most suitable accelerator to increase the hydrate formation rate. At present, the effect of various single and compound accelerators on the formation of hydrate has not formed a complete system, which needs further study.

Key words: CO2 hydrate, rate of formation, kinetic accelerator, nanofluid, ionic accelerator, SDS, nano-graphite, sodium chloride

摘要:

气体水合物具有很多优点,却没有大规模的工业化利用,最主要的问题是生成二氧化碳水合物速率缓慢,阻碍了水合物法技术的应用,因此最大程度地提高其生成速率是气体水合物技术得以成功应用的关键。最常见快速生成二氧化碳水合物的方法是加入促进剂,而不同种类和浓度的促进剂对二氧化碳水合物生成速率的作用效果不同。故本文主要概述二氧化碳水合物快速生成的方法,从动力学促进剂、纳米流体以及离子促进剂进行分析, 分别总结了它们对水合物的生成机理。分析了十二烷基硫酸钠(SDS)、纳米石墨、氯化钠三者单独作用时及三者和不同促进剂复配时对二氧化碳水合物的诱导成核时间、生成速率、相平衡、表面张力等方面的影响。最后指出:单一的促进剂都存在最佳浓度,但其会随着不同温度、压力等多种因素的改变而改变,以及不同种类的促进剂复配时存在协同作用且生成效果比单一的好,揭示不同温度、不同压力时最适宜的单一促进剂对水合物生成影响的规律及找出最适宜提高水合物生成速率的促进剂是今后研究的重点方向。目前各种单一的及复配的促进剂对水合物的生成影响尚未形成完整的体系,需要进一步研究。

关键词: CO2水合物, 生成速率, 动力学促进剂, 纳米流体, 离子型促进剂, 十二烷基硫酸钠, 纳米石墨, 氯化钠

CLC Number: 

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