Research progress of CO₂ separation technology by solvent absorption

The combustion of fossil fuels emits a large amount CO 2 , which causes the greenhouse effect and leads to global warming poses serious threat life on earth. capture technology can effectively reduce concentration in atmosphere, alleviate effect, improve environment. technologies include absorption, membrane separation adsorption separation, among chemical absorption have advantages high efficiency, low cost easy availability materials. In this paper, disadvantages three main methods (inorganic reagents, organic amines ionic liquids) adsorb are summarized. Among inorganic adsorbents, NH 3 ·H O achieve rapid efficient it is relatively stable not degrade. Common types amine adsorbents monoethanolamine, methanolamine, sterically hindered amine. However, difficult for single adsorbent meet requirements rate, capacity reaction heat at same time. Therefore, mixing absorbents with different characteristics their performance absorbing . Ionic liquids good thermal stability, very saturation vapor pressure, designable structure, new type adsorbent, but viscosity themselves. Combining or porous materials form loaded liquid materials, be used as only also avoid problem caused by direct liquids, thus improving efficiency.