The improvement of ionic liquids on CO 2 capture with biphasic absorbents

被引：11

作者：

Chen, Weida ^{[1
]}

Chen, Meisi ^{[1
]}

Jiang, Bin ^{[1
]}

Lei, Tong ^{[1
]}

Zhang, Feng ^{[1
]}

Zhang, Zhibing ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem, Minist Educ MOE, Xianlin Ave 163, Nanjing 210046, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 493卷

基金：

中国国家自然科学基金;

关键词：

CO; 2; capture; Ionic liquid; Biphasic absorbent; Hydrogen bonding; CARBON-DIOXIDE; ABSORPTION; OPTIMIZATION; SOLVENT;

D O I：

10.1016/j.cej.2024.152720

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biphasic absorbents composed of tetraethylenepentamine, 1-ethylimidazole, and H 2 O (TEH) exhibit notable absorption rates and CO 2 loads. However, troublesome precipitation forms in the enriched phase due to strong interactions among absorption products. To address this issue, six amino acid ionic liquids (AAILs) were introduced as split -phase regulators in TEH, developing a liquid -liquid biphasic absorption system TEH-AAILs, with outstanding absorption performance. By analyzing the kinetic data and establishing the evaluation parameters, combined with molecular dynamics simulations, the effects of AAILs on the loading and phasing performance were assessed. Remarkably, TEH-[Ser] was screened to possess good performance. Spectral analysis of the TEH[Ser] reaction mechanism further elucidates the bridged hydrogen bonding structure between [Ser] -CO 2 and H 2 O, highlighting its role in enhancing regeneration efficiency. This study provides insights into the design and optimization of biphasic absorbents for efficient CO 2 capture.

引用

页数：8

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