文献类型：期刊文献

英文题名：Alkanolamine-based dual functional ionic liquids with multidentate cation coordination and pyrazolide anion for highly efficient CO2 capture at relatively high temperature

作者：Qian, Weichuan[1];Xu, Yingjie[1];Xie, Bin[1];Ge, Yin[1];Shu, Hegang[1]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Zhejiang, Peoples R China

年份：2017

卷号：56

起止页码：194

外文期刊名：INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL

收录：SCI-EXPANDED(收录号：WOS:000390466900016)、、WOS

基金：The authors are grateful for National Natural Science Foundation of Zhejiang Province (LY14B060002), National Natural Science Foundation of China (No. 21406140), China Postdoctoral Science Foundation funded project (2015M571510), and National Undergraduate Training Program for Innovation and Entrepreneurship (No. 201510349016).

语种：英文

外文关键词：Ionic liquids; Metal chelate; CO2 capture; Pyrazolide anion; Alkanolamine

外文摘要：Six dual functional ionic liquids (DFILs) with metal chelate cation and pyrazolide anion were synthesized by reacting alkanolamine with pyrazole sodium salt, and characterized by H-1 NMR, C-13 NMR, FT-IR, and ESI-MS spectra. Thermal decomposition temperature and viscosity were determined. The behavior of CO2 absorption for these DFILs was evaluated at T = 353.2 K. Absorption mechanism and the influence of temperature and N-2 on the CO2 absorption were investigated. The results show that the CO2 capacity of the DFILs consisting of alkanolamine with pyrazole sodium in a molar ratio of 2:1 is larger than that of the DFILs in a molar ratio of 1:1. The CO2 absorption mechanism obtained from FT-IR and C-13 NMR spectra indicates that CO2 could react with a quasi-aza-crown ether cation and pyrazolide anion simultaneously, resulting in improved capacity of CO2 absorption. According to the saturated CO2 absorption capacity at 333.2-363.2 K and van't Hoffs equation, the enthalpy of CO2 absorption for three DFILs is derived. Furthermore, the DFILs were carried out for five cycles with no obvious loss in the absorption capacity of CO2, indicating that these DFILs may be good candidates for efficient CO2 capture at relatively high temperature. (C) 2016 Elsevier Ltd. All rights reserved.