Facilitated transport separation of CO_(2) and H_(2)S by supported liquid membrane based on task-specific protic ionic liquids

作     者：Lingling Peng Mingzhen Shi Xiaomin Zhang Wenjie Xiong Xingbang Hu Zhuoheng Tu Youting Wu Lingling Peng;Mingzhen Shi;Xiaomin Zhang;Wenjie Xiong;Xingbang Hu;Zhuoheng Tu;Youting Wu

作者机构：Key Laboratory of Mesoscopic Chemistry of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Yuxiu Postdoctoral InstituteNanjing UniversityNanjing210023China 

出 版 物：《Green Chemical Engineering》 (绿色化学工程（英文）)

年 卷 期：2022年第3卷第3期

页      面：259-266页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：This work was sponsored by the Natural Science Foundation of Jiangsu Province(BK20190310) China Postdoctoral Science Foundation(2021M691515) the Postdoctoral Science Foundation of Jiangsu Province(2021K211B) the National Natural Science Foundation of China(Nos.22078145 and 21878141) 

主　　题：Ionic liquids Carbon dioxide Membrane separation Facilitated transport Natural gas sweentening 

摘      要：Selective separation of CO_(2) and H_(2)S from CH_(4) is of importance to the natural gas upgrading because of its cor-rosivity. As is well known, amine group can recognize reversibly CO_(2) and H_(2)S with a moderate interaction. Withthis in mind, this work prepared a series of amine-functionalized supported-protic-ionic-liquid membranes(SPILMs) for the selective separation of CO_(2) and H_(2)S from CH_(4) . For comparison, aprotic ionic liquid membranewas also prepared for natural gas sweetening. The effect of temperature and transmembrane pressure differenceon the permeability of single gas and ideal selectivity of CO_(2)/CH_(4) and H_(2)S/CO_(2) were studied. Facilitated transportmechanism was studied by NMR spectra. The permeability of CO_(2) in primary amine functionalized [DMPDAH][Tf_(2)N]-based membrane decreases with the increasing transmembrane pressure, indicating a typical feature offacilitated transport membrane. The permeability of CO_(2) and the ideal selective of CO_(2)/CH_(4) are as high as 2000 barrers and 53.2 at 313.2 K in [DMPDAH][Tf_(2)N] membrane, significantly higher than those in conventional ILsmembrane. It is anticipated that these amine-functionalized SPILMs can provide alternative insight for the se-lective separation of CO_(2) and H_(2)S from CH_(4) .