MEA+MDEA溶液的催化再生研究  

Catalytic Regeneration Study of MEA+MDEA Solution

作　　者：张文[1] 李珂 杨浩然 何志军 沈宇航 ZHANG Wen;LI Ke;YANG Haoran;HE Zhijun;SHEN Yuhang(Guangxi Yuchai Machinery Group Co.,Ltd,Yulin 537005,China;Shanghai Qiyao Environmental Technology Co.,Ltd.,Shanghai 200090,China;Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]广西玉柴机器股份有限公司,玉林537005 [2]上海齐耀环保科技有限公司,上海200090 [3]上海海事大学商船学院,上海201306

出　　处：《柴油机》2024年第5期30-34,40,共6页Diesel Engine

基　　金：国家重点研发计划(2022YFE0124300)。

摘　　要：在间歇式反应器中研究几种常用的商用催化剂HZSM-5-25、HZSM-5-50、γ-Al_(2)O_(3)以及SiO_(2)对单乙醇胺(monoethanolamine,MEA)溶液和MEA+甲基二乙醇胺(N-Methyldiethanolamine,MDEA)混合胺水溶液再生过程的影响。结果表明:HZSM-5-25对MEA水溶液再生过程的催化效果最佳,可使MEA富液瞬时最大CO_(2)解吸速率提升约8.25%,平均解吸速率提升约5.24%;对于MEA+MDEA混合胺吸收剂,叔胺MDEA与CO_(2)反应的碱催化水合机制为反应体系带来了大量的HCO-3,可以在很大程度上加快CO_(2)的释放,这导致HZSM-5-25催化剂对混合胺溶液再生过程的促进效果显著低于其对单MEA溶液的催化效果,瞬时最大解吸速率仅提高4.91%。The effects of several commonly used commercial catalysts,HZSM-5-25,HZSM-5-50,γ-Al_(2)O_(3) and SiO_(2),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 CO_(2) 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 CO_(2) brought a large amount of HCO-3 to the reaction system,which accelerates the release of CO_(2) 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 

分 类 号：O643.36[理学—物理化学]