Ionic liquids have extremely low vapor pressure,good thermal stability and low heat capacity,which can be designed according to specific requirements,and can make up for the shortcomings of conventional CO2 capture technology,it is a hot spot in the current research on CO2 capture technology.This paper mainly summarizes the research progress of the application of ordinary ionic liquids and ionic liquid combination solutions in CO2 capture,compares several commonly used separation technologies,analyzes their advantages and disadvantages,points out the problems and development directions of CO2 capture,and puts forward corresponding opinions and suggestions to provide reference for relevant practitioners.
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