Chemical Industry and Engineering Progress ›› 2022, Vol. 41 ›› Issue (10): 5259-5271.DOI: 10.16085/j.issn.1000-6613.2021-2632

• Energy processes and technology • Previous Articles     Next Articles

Research progress on influencing factors and strengthening mechanism of CO2-CH4 hydrate replacement in porous media system

ZHANG Xuemin1,2,3(), ZHANG Shanling1,2,3, LI Pengyu1,2,3, HUANG Tingting1,2,3, YIN Shaoqi1,2,3, LI Jinping1,2,3, WANG Yingmei1,2,4   

  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 730000, Gansu, China
  • Received:2021-12-27 Revised:2022-02-15 Online:2022-10-21 Published:2022-10-20
  • Contact: ZHANG Xuemin

多孔介质中CO2-CH4水合物置换的影响因素及强化机理研究进展

张学民1,2,3(), 张山岭1,2,3, 李鹏宇1,2,3, 黄婷婷1,2,3, 尹绍奇1,2,3, 李金平1,2,3, 王英梅1,2,4   

  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 730000
  • 通讯作者: 张学民
  • 作者简介:张学民(1987—),男,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:zxm2010lut@163.com
  • 基金资助:
    国家自然科学基金(51906093);中科院天然气水合物重点实验室开放基金(Y907ke1001);兰州理工大学“红柳优秀青年人才支持计划”(2018)

Abstract:

Natural gas hydrate has become one of the most promising clean energy sources in the future due to its huge reserves, clean and pollution-free.CO2 replacement method can realize the safe exploitation of natural gas hydrate and the storage of greenhouse gas. However, the replacement process of CO2-CH4 hydrate in porous media is characterized by long reaction period, slow rate and low efficiency, which has become a bottleneck restricting the efficient exploitation of natural gas hydrate. In this paper, the displacement characteristics of CO2-CH4 hydrate in porous media system are reviewed, and the displacement mechanism and dynamic process of CO2-CH4 hydrate are analyzed. On this basis, the effects of different factors on the efficiency of CO2-CH4 hydrate replacement in porous media and their strengthening mechanisms are described in detail, including thermal stimulation, displacement pressure, small molecule gas and chemical additives. Finally, the shortcomings and future development direction of CO2-CH4 hydrate replacement enhancement technology in porous media system are pointed out. Further research is needed to understand the strengthening mechanism and dynamic mechanism of CO2-CH4 hydrate replacement in porous media.

Key words: gas hydrate, porous media, displacement characteristics, CO2 sequestration, strengthening mechanism

摘要:

天然气水合物因其储量巨大、清洁无污染而成为未来最具潜力的清洁能源之一,CO2置换法可实现天然气水合物的安全开采和温室气体的地层封存。然而,多孔介质中CO2-CH4水合物的置换过程存在反应周期长、速率慢、效率低等特点,已成为制约天然气水合物高效开采的瓶颈问题。本文全面综述了多孔介质体系中CO2-CH4水合物的置换特性,分析了CO2-CH4水合物的置换机理及其动力学过程。在此基础上,详述了不同因素对多孔介质中CO2-CH4水合物置换效率的影响规律及强化机理,包括热刺激、置换压力、小分子气体、化学添加剂等的作用机理及其规律。最后指出了多孔介质体系中CO2-CH4水合物置换过程强化技术存在的不足和未来的发展方向。对多孔介质体系中CO2-CH4水合物置换过程的强化机理及其动力学机制的认识仍需进一步研究。

关键词: 天然气水合物, 多孔介质, 置换特性, CO2封存, 强化机理

CLC Number: 

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