Research progress of CO2 chemical absorption from flue gas and hydroconversion catalysts
A large amount of CO2 is emitted from power generation process of coal-fired power plants.Efficient capture and resource utilization of CO2 from flue gas is particularly important for carbon emission reduction.CO2 chemical absorption from post-combustion flue gas is the most mature separation method,and some CO2 capture projects have been successfully implemented,but there are still shortcomings of high cost and high energy consumption.The development of new efficient CO2 absorbents and process optimization have become the focus of current research.The connection of CO2 chemical absorption and catalytic synthesis of chemicals and fuels from CO2 hydrogenation in flue gas is an effective way to reduce carbon emission in coal-fired power plants.With the continuous deepening of CO2 catalytic conversion research,domestic and foreign researchers have made some progress in CO2 catalytic hydrogenation to chemicals.Firstly,the carbon capture mechanism and renewable energy consumption of monoamine absorbents were introduced,and the CO2 absorption performance,energy consumption reduction principle and carbon capture process of new absorbents(mixed amine solution,two-phase absorbent and functionalized ionic liquid)were further reviewed.The research status of CO2 desorption catalysts and process parameter optimization in reducing renewable energy consumption were summarized.Then,based on the different types of CO2 hydrogenation products(methanol,low carbon olefins and high carbon hydrocarbons),the research progress of CO2 catalytic hydrogenation catalysts was investigated.Finally,the development direction of CO2 capture by chemical absorption method after combustion and CO2 hydrogenation catalysts were prospected.
CO2 capturechemical absorptioncatalytic hydrogenationmethanololefinshigh carbon hydrocarbons
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