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 

机构地区：[1]Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing,210023,China [2]Yuxiu Postdoctoral Institute,Nanjing University,Nanjing,210023,China

出　　处：《Green Chemical Engineering》2022年第3期259-266,共8页绿色化学工程（英文）

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)。

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) .

关 键 词：Ionic liquids Carbon dioxide Membrane separation Facilitated transport Natural gas sweentening 

分 类 号：TE644[石油与天然气工程—油气加工工程] TQ028.8[化学工程]