CO2 chemical absorption using chemical absorbents is regarded as an effective solution to control CO2 emission. As all major CO2 chemical absorbent groups have their limitations, which pose significant challenges to commercialisation. To overcome these limitations, hybrid chemical absorbents, which involve blending two or more chemical absorbents to leverage the characteristics and performance of each, had been studied and evaluated. Industry utilization has been introduced, Based on this, several advanced solvents such as biphasic solvent , water lean solvent catches considerable attention due to its lower operation temperature, energy saving, higher cyclic capacity. However, the high viscosity and emission of the new solvents affect their utilization and has been addressed. In order to further reduce energy consumption, solid acid-catalysts(SAC) such as metal oxides, molecular sieves, natural clay minerals, composite materials are proved effective improving energy efficiency of regeneration. The desorption process mainly includes the breakdown of carbamate (RNHCOO−) and the deprotonation of proton amine (RNH3+). The catalytic mechanism of solid acid-catalysts is based on Brønsted's acid-base theory and Lewis's acid-base theory. How to develope the best commercially accessible catalyst and solvent system combination, which can produce the necessary synergistic effect to reduce the energy consumption for CO2 desorption and can be applied to actual industrialization, is disccused. The degradation of solvent is another way to affect the solvent performance. This study also focus on the synergistic effects of degradation and corrosion of solvents and HSS removal by two-stage electrodialysis unit. This report will give an overview of solvents selection and management.
 

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