Research progress of carbon capture technology based on alcohol amine solution

CO2 emissions are the primary cause of global warming and climate anomalies. Reducing CO2 emissions to arrest or mitigate global warming has been a hot topic of discussion. Carbon Capture, Utilization and Storage (CCUS) is an effective carbon reduction technology, in which the chemical absorption method based on amine solution is the most promising and widely used carbon capture technology among the CCUS technologies, but the high energy consumption of its regeneration increases the cost of carbon capture and restricts the promotion of CCUS technology. This paper firstly introduces the process of CCUS technology, and reviews the current development of carbon capture technology based on alcoholic amine solution from three perspectives, including the development of absorbent, the influence of the operating parameters of the carbon capture system on the capture effect, and the optimization of the carbon capture system, with regard to the carbon capture technology of alcoholic amine solution. Research results show that the current popular optimization directions include: developing new absorbents with high CO2 absorption rate and low regeneration energy consumption; analyzing the material, temperature and energy distribution of the system through thermodynamic methods, such as exergy analysis and pinch analysis, to properly operate the whole carbon capture system; optimizing the traditional carbon capture system, for example, by changing the feed method of the absorbent to achieve a more efficient capture, introducing energy-saving equipment, such as heat pumps, to increase the energy efficiency of the system or by coupling it with solar power, LNG, or other clean energy sources, to achieve the reasonable integration of multistage energy sources.