Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF4 Composite Membranes

doi:10.1016/S1004-9541(13)60515-7

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (6): 683-690.DOI: 10.1016/S1004-9541(13)60515-7

Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes

王雁北, 任吉中, 李晖, 邓麦村

National Engineering Research Center of Membrane Technology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China

收稿日期:2012-02-08 修回日期:2012-12-28 出版日期:2013-06-28 发布日期:2013-07-03
通讯作者: REN Jizhong
基金资助:
Supported by the National Natural Science Foundation of China (20776137) and the National High Technology Research and Development Program of China (2008AA06Z325).

Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes

WANG Yanbei, REN Jizhong, LI Hui, DENG Maicun

National Engineering Research Center of Membrane Technology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China

Received:2012-02-08 Revised:2012-12-28 Online:2013-06-28 Published:2013-07-03
Contact: REN Jizhong
Supported by:
Supported by the National Natural Science Foundation of China (20776137) and the National High Technology Research and Development Program of China (2008AA06Z325).

摘要/Abstract

摘要： In this paper, the effect of hydrogen reduction of silver ions on the performance and structure of new solid polymer electrolyte polyetherimide (PEI)/Pebax2533 (Polynylon12/tetramethylene oxide block copolymer, PA12-PTMO)/AgBF₄ composite membranes is investigated. For PEI/Pebax2533/AgBF₄ composite membranes prepared with different AgBF₄ concentration, the permeances of propylene and ethylene increase with the increase of AgBF₄ concentration due to the carrier-facilitated transport, resulting in a high selectivity. But for propylene/propane mixture, the mixed-gas selectivity is lower than its ideal selectivity. The hydrogen reduction strongly influences the membrane performance, which causes the decrease of propylene permeance and the increase of propane permeance. With the increase of hydrogen reduction time, the membranes show a clearly color change from white to brown, yielding a great selectivity loss. The data of X-ray diffraction and FT-IR prove that silver ions are reduced to Ag⁰ after hydrogen reduction, and aggregated on the surface of PEI/Pebax2533/AgBF₄ composite membranes.

关键词: solid polymer electrolyte membrane, hydrogen reduction of silver ions, facilitated transport, olefin/paraffin separation

Abstract: In this paper, the effect of hydrogen reduction of silver ions on the performance and structure of new solid polymer electrolyte polyetherimide (PEI)/Pebax2533 (Polynylon12/tetramethylene oxide block copolymer, PA12-PTMO)/AgBF₄ composite membranes is investigated. For PEI/Pebax2533/AgBF₄ composite membranes prepared with different AgBF₄ concentration, the permeances of propylene and ethylene increase with the increase of AgBF₄ concentration due to the carrier-facilitated transport, resulting in a high selectivity. But for propylene/propane mixture, the mixed-gas selectivity is lower than its ideal selectivity. The hydrogen reduction strongly influences the membrane performance, which causes the decrease of propylene permeance and the increase of propane permeance. With the increase of hydrogen reduction time, the membranes show a clearly color change from white to brown, yielding a great selectivity loss. The data of X-ray diffraction and FT-IR prove that silver ions are reduced to Ag⁰ after hydrogen reduction, and aggregated on the surface of PEI/Pebax2533/AgBF₄ composite membranes.

Key words: solid polymer electrolyte membrane, hydrogen reduction of silver ions, facilitated transport, olefin/paraffin separation

王雁北, 任吉中, 李晖, 邓麦村. Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes[J]. Chinese Journal of Chemical Engineering, 2013, 21(6): 683-690.

WANG Yanbei, REN Jizhong, LI Hui, DENG Maicun . Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes[J]. Chin.J.Chem.Eng., 2013, 21(6): 683-690.

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Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes

Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF₄ Composite Membranes

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