含乙醇胺三元低共熔溶剂吸收CO_(2)的研究  

CO_(2)Absorption by Ethanolamine-Based Ternary Deep Eutectic Solvents

作　　者：李秀婷 邵斌 练昕宜 韦凯媛 李天阳子 钟缪亦兰 胡军[1] 王小永[1] LI Xiuting;SHAO Bin;LIAN Xinyi;WEI Kaiyuan;LI Tianyangzi;ZHONG Miuyilan;HU Jun;WANG Xiaoyong(School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学与分子工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2024年第2期208-213,共6页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(22273022)。

摘　　要：以氯化胆碱(ChCl)、甘油(Gly)、乙醇胺(MEA)为原料,制备了ChCl-Gly-MEA三元低共熔溶剂(DES),研究了其在室温和常压下对CO_(2)的吸收性能。在ChCl、Gly、MEA具有不同物质的量之比(1∶1∶4、1∶1∶6、1∶1∶8、1∶1∶10)的4种样品中,当ChCl、Gly、MEA物质的量之比为1∶1∶10时,CO_(2)的吸收量最大,每克DES中CO_(2)的吸收量为0.18 g。CO_(2)流速越高、含水量越低,则ChCl-Gly-MEA三元DES对CO_(2)的吸收量越大。ChCl-Gly-MEA三元DES对CO_(2)的吸收机理同时存在物理吸收和化学吸收,MEA的加入会显著提高其化学吸收作用。经5次吸收-解吸-再吸收后,ChCl-Gly-MEA三元DES仍保持97.3%的再生效率,说明ChCl-Gly-MEA三元DES具有良好的再生性。Ternary deep eutectic solvents(DES)comprising choline chloride(ChCl),glycerol(Gly)and ethanolamine(MEA)with different molar ratios were prepared.The CO_(2)absorption ability of the ternary DES was investigated at room temperature and under atmospheric pressure.Among four ternary DES samples prepared with different molar ratios,a ChCl-Gly-MEA(1:1:10)ternary DES was found to absorb the most CO_(2)at a capacity of 0.18 g CO_(2)(DES per gram)at 298 K and 101.3 kPa.The experimental results showed that the CO_(2)absorption capacity of ChCl-Gly-MEA(1:1:10)ternary DES increased with an increase in gas flow rate and a decrease in water content.The gas flow rate improved the mass transfer efficiency of CO_(2)in the ternary DES system,and shortened the time required for CO_(2)absorption to reach equilibrium.However,the addition of water could weaken the hydrogen bonding interaction among the three components in the DES system.Results from Fourier transform infrared(FT-IR)and nuclear magnetic resonance(NMR)spectroscopy indicated that CO_(2)interacted with the amino groups in DES to form carbamates.The absorption of CO_(2)by ChCl-Gly-MEA underwent both physical and chemical absorption,and the chemical absorption was significantly enhanced by the addition of MEA.A recovery experiment showed that no obvious loss in CO_(2)absorption was detected after five absorption/desorption cycles with an absorption rate of 97.3%being retained.

关 键 词：低共熔溶剂(DES) CO_(2) 物理吸收 化学吸收 再生性 

分 类 号：O647.3[理学—物理化学]