文献类型：期刊文献

英文题名：Highly efficient and reversible CO2 capture through 1,1,3,3-tetramethylguanidinium imidazole ionic liquid

作者：Lei, Xingxing[1];Xu, Yingjie[1];Zhu, Lili[1];Wang, Xuhong[1]

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

年份：2014

卷号：4

期号：14

起止页码：7052

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000329992200027)、、WOS

基金：D. S. R. thanks the University Grants Commission (41-20282012(SR), 2012), New Delhi, India and DU-PURSE, University of Delhi, Delhi, India for financial support. S. M. is thankful to CSIR for the award of a junior and senior research fellowship. We thank USIC-CIF, University of Delhi, for analytical data. A. P. and S. V. M. would like to acknowledge support from the National Cancer Institute, National Institutes of Health, under Contract no. HHSN261200800001E.

语种：英文

外文关键词：Ionic liquids - Moisture - Molar ratio - Nuclear magnetic resonance spectroscopy

外文摘要：1,1,3,3-Tetramethylguanidinium imidazole ([TMG][IM]) ionic liquid was synthesized and its absorption and desorption of CO2 were investigated, as well as the effect of reaction temperature, N-2, and moisture on capture of CO2 and the absorption mechanism. The results show that the maximum molar ratio of CO2 to [TMG][IM] is to achieve 1.01 at 30 degrees C under atmosphere pressure with a high absorption rate. The capture capability is not obviously affected by the moisture of CO2, but decreases with temperature increasing from 30 to 50 degrees C. The absorption mechanism might be that CO2 reacts with the imidazole anion of [TMG][IM] and then a new carbamate group is formed, which is confirmed by IR and NMR spectra. The enthalpy of CO2 absorption for [TMG][IM] is -30.3 kJ mol(-1). The captured CO2 can be readily released at 65 degrees C by bubbling N-2 and recycled with little loss of its capture capability. Considering the efficient and reversible process with [TMG][IM], this method has great potential for the capture of CO2.