用于捕集CO2的相变吸收剂与乙醇胺吸收剂性能对比OA北大核心

Objective The aim is to solve the problems of high regeneration energy consumption and high economic cost in the capture of carbon dioxide(CO2)by traditional absorbents,and to develop new phase change absorbents.Methods This paper provided a comparative study of the performance of four phase change absorbent systems:DETA-1-propanol,MMEA-DEG,DEEA-MEA,and DEEA-AEEA.Using monoethanolamine(MEA)with a traditional absorbent mass fraction of 30%as a reference standard,experiments were conducted to study absorption,desorption,foaming,corrosion,cyclic absorption-desorption,as well as estimated regeneration energy consumption and costs.Results The DETA-1-propanol system had a rich phase volume accounting for 66%of the total volume,with a maximum absorption capacity of 3.34 mol/kg,representing a 54.6%improvement compared to 30%MEA absorbents.The solvent cost was 11 500 yuan/t,which increased by 35.5%compared to 30%MEA absorbents.The regeneration enthalpy was 0.28 GJ/t CO2,and the regeneration latent heat was 1.1 GJ/t CO2.Compared with MEA absorbent,it reduced by 73.3%and 12.0%,respectively.Conclusions The DETA-1-propanol absorbent system exhibits higher absorption and desorption performance,high cycling stability,as well as lower regeneration energy consumption and solvent cost.