Efficient capture of CO2 by a new biphasic solvent-ionic liquid system

被引：0

作者：

Lyu C. ^{[1
]}

Zhang X. ^{[1
]}

Jin L. ^{[1
]}

Yang L. ^{[1
]}

机构：

[1] Key Laboratory of Energy Heat Conversion and Process Measurement and Control, The Ministry of Education, Southeast University, Jiangsu, Nanjing

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 06期

关键词：

biphasic solvent; carbon dioxide; DBU][IM] ionic liquid;

D O I：

10.16085/j.issn.1000-6613.2022-1511

中图分类号：

学科分类号：

摘要：

In this study, tetramethylethylenediamine (TMEDA) was used as phase separating agent, four kinds of amines (ethanolamine, aminoethylethanolamine, triethylenetetramine and diethylenetriamine) that commonly used to capture CO2 were mixed with TMEDA in a mass ratio of 1∶2. The solvent composed of TMEDA and AEEA could form a liquid-liquid phase separation after absorbing CO2, and had the best CO2 absorption characteristics, with absorption loading capacity of 1.620molCO2/kg. The mixture of 1,8-diazabicyclo [5.4.0] undecano-7-en-imidazole ([DBU] [Im]) ionic liquid and TMEDA-AEEA biphasic solvent was used to study the influence of [DBU][Im] on the absorption and phase separation characteristics. The material distribution of organic amine and CO2 products in two phases were analyzed by 13C NMR spectrum. It was indicated the introduction of [DBU] [Im] ionic liquids into TMEDA-AEEA biphasic solvent was helpful to increase the CO2 absorption loading capacity. The [DBU][Im] ionic liquids, water and CO2 reaction products were mainly distributed in the lower liquid phase, while TMEDA and a small amount of [DBU][Im] ionic liquids existed in the upper liquid phase. When the mass ratio of TMEDA, AEEA, water and [DBU][Im] ionic liquid was 10∶4∶5∶1, the absorption loading of the rich liquid phase of the absorbent was 49.6% higher than that of TMEDA-AEEA biphasic solvent. © 2023 Chemical Industry Press. All rights reserved.

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页码：3226 / 3232

页数：6

共 21 条

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