Effect of the presence of trace sulfur dioxide on piperazine-based amine absorbents for carbon dioxide capture  

作　　者：Songtao Zheng Yao Jiang Shaojun Jia Yan Wu Peng Cui 

机构地区：[1]School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第9期34-41,共8页中国化学工程学报（英文版）

基　　金：supported by the Major Science and Technology Project of Anhui Province(201903a07020004);the National Natural Science Foundation of China(22208078);the Fundamental Research Funds for the Central Universities(JZ2023HGTB0226).

摘　　要：The effect of the presence of trace SO_(2)in industrial flue gas on the amine-scrubbing-based absorption process for CO_(2)capture has been a matter of concern.This study aimed to investigate the effect of trace SO_(2)on the CO_(2)capture process using piperazine-based amine absorbents,focusing on SO_(2)-resistance capability,SO_(2)/CO_(2)absorption selectivity,and cyclic stability.The presence of trace SO_(2)not only restrains CO_(2)absorption,but also promotes the formation of carbamate within the piperazine-based amine absorbents.Remarkably,the incorporation of aminoethyl group in piperazine-based amine absorbents can enhance the SO_(2)-resistance capability by promoting the formation of carbamate,while piperazine-based amine absorbents with hydroxyethyl group can promote the formation of bicarbonate to reduce the SO_(2)-resistance capability.The work offers valuable insights into the efficient application of novel amine absorbents for CO_(2)capture from practical industrial flue gas.

关 键 词：CO_(2)capture PIPERAZINE Amine absorbent Trace SO_(2) Absorption 

分 类 号：X701[环境科学与工程—环境工程] TQ028.17[化学工程]