Application of membrane separation technology in postcombustion carbon dioxide capture process

Membrane separation technology is a possible breakthrough in post-combustion carbon dioxide capture process. This review first focuses on the requirements for CO₂ separation membrane, and then outlines the existing competitive materials, promising preparation methods and processes to achieve desirable CO₂ selectivity and permeability. A particular emphasis is addressed on polyimides, poly (ethylene oxide), mixed-matrix membrane, thermally-rearranged polymer, fixed site carrier membrane, ionic liquid membrane and electrodialysis process. The advantages and drawbacks of each of materials and methods are discussed. Research threads and methodology of CO₂ separation membrane and the key issue in this area are concluded