Semi-clathrate hydrate based carbon dioxide capture and separation techniques  

作　　者：Lijuan Gu Hailong Lu 

机构地区：[1]Beijing International Center for Gas Hydrate,School of Earth and Space Sciences,Peking University,Beijing 100871,China [2]National Engineering Research Center for Gas Hydrate Exploration and Development,Guangzhou 511466,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第12期1-29,共29页环境科学与工程前沿（英文）

基　　金：funded by the financial support from the China Geological Survey(No.DD20230063);the Guangdong Major Project of Basic and Applied Basic Research(No.2020B0301030003).

摘　　要：CO_(2)is considered as the main contributor to global warming,and hydrate enclathration is an efficient way for carbon capture and separation(CCS).Semi-clathrate hydrate(SCH)is a type of clathrate hydrate capable of encaging CO_(2)molecules under mild temperature and pressure conditions.SCH has numerous unique advantages,including high thermal stability,selective absorption of gas molecules with proper size and recyclable,making it a promising candidate for CCS.While SCH based CCS technology is in the developing stage and great efforts have to be conducted to improve the performance that is determined by their thermodynamical and structural properties.This review summarizes and compares the thermodynamic and structural properties of SCH and quaternary salt hydrates with gas mixtures to be captured and separated.Based on the description of the physical properties of SCH and hydrate of quaternary salts with gas mixture,the CO_(2)capture and separation from fuel gas,flue gas and biogas with SCH are reviewed.The review focuses on the use of tetra-nbutyl ammonium halide and tetra-n-butyl phosphonium halide,which are the current application hotspots.This review aims to provide guidance for the future applications of SCH.

关 键 词：Semi-clathrate hydrate Tetra-n-butyl ammonium halide Tetra-n-butyl phosphonium halide Structure Thermodynamical properties CO_(2) capture and separation 

分 类 号：O62[理学—有机化学]