CO2 capture by a highly-efficient aqueous blend of monoethanolamine and a hydrophilic amino acid ionic liquid [C2OHmim][Gly]

被引：55

作者：

Lv, Bihong ^{[1
,2
]}

Shi, Yun ^{[1
]}

Sun, Cheng ^{[1
]}

Liu, Nan ^{[1
]}

Li, Wei ^{[1
]}

Li, Sujing ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Ind Ecol & Environm, Dept Chem & Biol Engn, Key Lab Biomass Chem Engn,Minist Educ, Hangzhou 310027, Zhejiang, Peoples R China

[2] Huaqiao Univ, Coll Chem Engn, Dept Environm Sci & Engn, Xiamen 361021, Fujian, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2015年 / 270卷

基金：

中国国家自然科学基金;

关键词：

CO2; capture; Monoethanolamine; Amino acid ionic liquid; Regeneration; CARBON-DIOXIDE ABSORPTION; OXIDATIVE-DEGRADATION; KINETICS; ABSORBENTS; VISCOSITY; DENSITY; MDEA;

D O I：

10.1016/j.cej.2015.02.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A hydrophilic amino acid ionic liquid [C(2)OHmim][Gly] synthesized by our laboratory was utilized to enhance the process of MEA for CO2 capture from low-pressure flue gas. The optimum proportion of the mixed solution was chosen as 0.7 mol L-1 MEA and 0.3 mol L-1 [C(2)OHmim][Gly]. The absorption capacity of the new absorbent was 0.534 mol CO2/mol absorbent under 3% O-2, and was higher than that of MEA (0.430 mol CO2/mol amine). The capacity of MEA/[C(2)OHmim][Gly] solution was maintained at 0.50 mol CO2/mol absorbent even with 8% of O-2. Only 12.6% of decrease in the absorption capacity was noticed compared with that in the absence of O-2. Furthermore, it was well recycled with a regeneration efficiency, of 90.2% by thermal regeneration after fourth-cycle experiments in 3% O-2. The new absorbent is proved to have a reduced degradation and evaporation rate, an enhanced absorption capacity and a high stability and regeneration efficiency for the CO2 capture. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：372 / 377

页数：6