Biodegradable betaine-based aprotic task-specific ionic liquids and their application in efficient SO2 absorption

被引：45

作者：

Yang, Benqun ^{[1
,2
]}

Zhang, Qinghua ^{[1
]}

Fei, Yuqing ^{[1
]}

Zhou, Feng ^{[1
]}

Wang, Peixue ^{[1
]}

Deng, Youquan ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Ctr Green Chem & Catalysis, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

GREEN CHEMISTRY | 2015年 / 17卷 / 07期

基金：

中国国家自然科学基金;

关键词：

SOLUBILIZING METAL-OXIDES; QUATERNARY AMMONIUM-SALTS; HIGHLY EFFICIENT; MELTING-POINT; CO2; CAPTURE; FLUE-GAS; ANION; DENSITY; MIXTURES; EXCHANGE;

D O I：

10.1039/c5gc00691k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Utilization of cheap and natural resources is an important topic in green chemistry. A new class of betaine-based aprotic task-specific ionic liquids (ILs), including [C(4)bet][TFSI], [C(4)bet][DCA], [C(4)bet][SCN], [1O2bet][TFSI], [1O2bet][DCA], [2O2bet][TFSI], and [2O2bet][DCA], has been designed and prepared through a new ionic liquidization strategy from the renewable natural resource betaine. Their physicochemical characteristics, including spectral properties, density, viscosity, melting point, glass transition temperature, thermal stability, conductivity and electrochemical window, have been comprehensively studied. They were first applied as new absorbents for SO2 capture, and [C(4)bet][SCN] exhibited the maximum absorption capacity of 0.93 mol(SO2)/mol(ILs) at 20 degrees C and 1 atm (SO2/N-2 = 10% vol.) with rapid absorption rates in 21 min. Moreover, the effect of temperature, pressure, and water content on the absorption performance of SO2 was investigated. The possible absorption mechanism was studied using FT-IR, NMR and quantum chemical calculation. In addition, the [C(4)bet][SCN] can maintain the high absorption capacity and the rapid absorption rates for 25 absorption/desorption cycles.

引用

页码：3798 / 3805

页数：8

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