The effects of several commonly used commercial catalysts,HZSM-5-25,HZSM-5-50,γ-Al2O3 and SiO2,on the regeneration of MEA (monoethanolamine) solution and MEA+MDEA (N-Methyldiethanolamine MINE) mixed amine aqueous solution were investigated in a batch reactor. The results show that HZSM-5-25 has the best catalytic effect on the regeneration process of MEA aqueous solution,which increases the instantaneous maximum CO2 desorption rate of the MEA-rich solution by about 8.25％ and the average desorption rate by about 5.24％;For MEA+MDEA mixed amine absorbent,the base-catalyzed hydration mechanism of tertiary amine MDEA reacting with CO2 brought a large amount of HCO-3 to the reaction system,which accelerates the release of CO2 to a large extent,and results in the catalytic effect of HZSM-5-25 catalyst on the regeneration process of the mixed amine solution being significantly lower than that on single MEA solution,with an increase of 4.91％ in the instantaneous maximum desorption rate.
关键词
碳捕集/再生能耗/催化剂/混合胺溶液
Key words
carbon capture/regeneration energy consumption/catalyst/mix amine solution
维普
万方数据