Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (5): 38-46.doi: 10.19964/j.issn.1006-4990.2022-0030

• Reviews and Special Topics • Previous Articles     Next Articles

Technology development status of carbon dioxide removal from natural gas by membrane process

YAN Shuo(),YU Haibin,CHEN Zan()   

  1. CenerTech Tianjin Chemical Research and Design Institute Co. ,Ltd. CNOOC,Tianjin 300131,China
  • Received:2022-01-17 Online:2022-05-10 Published:2022-05-31
  • Contact: CHEN Zan E-mail:yans116@126.com;chenzan_ac@163.com

Abstract:

The current development status of membrane technology for CO2 removal from natural gas was reviewed.Firstly,the technical characteristics and application situations of various processes for removing CO2 from natural gas were compared.Compared with other separation methods,the membrane separation method has the advantages of less investment,small footprint,and low energy consumption.The principle of membrane separation,membrane materials,development status of membrane modules,and technical units of membrane technology to remove CO2 from natural gas were introduced.The process technology unit was further divided into pretreatment unit and membrane separation unit:the pretreatment unit was selected to different removal methods to combine according to the components of the produced raw material gas;the raw material gas was entered the membrane separation unit after passing through the pretreatment unit.According to the actual working conditions,considering the hydrocarbon recovery rate,land occupation,energy consumption,investment and other factors,the membrane decarbonization separation process was reasonably designed.Then,the domestic and foreign application cases for the removal of CO2 from natural gas by membrane methods were introduced.At present,there were many application cases of foreign membrane methods to remove CO2 from natural gas,while there were few domestic application cases.Therefore,it was necessary to increase the domestic membrane method to remove CO2 from natural gas industrial applications.Finally,the development direction of CO2 removal technology by natural gas membrane method was prospected.The research and development of membrane materials with independent intellectual property rights and maintaining high performance and long?term stability under actual complex working conditions is the focus of future membrane separation technology development.A coupled integrated combined process was that combining two or more single CO2 removal technologies,such as membrane separation+chemical absorption,membrane separation+temperature swing adsorption,etc.This coupled integrated combined process would provide new directions for the future decarbonization process technological developments.

Key words: membrane, natural gas, removal, carbon dioxide, process technology

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