Preparation of composite poly(ether block amide) membrane for CO2 capture |
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摘 要: | In this study, a poly(ether block amide) (Pebax 1657) composite membrane applied for COa capture was prepared by coating Pebax 1657 solution on polyacrylonitrile (PAN) ultrafiltration membrane. Ethanol/water mixture was used as the solvent of Pebax and the effects of ethanol/water mass ratios and Pebax concentration on the permeation properties of composite membrane were studied. To enhance the com- posite membrane permeance, the gutter layer, made from reactive amino silicone crosslinking with potydimethylsiloxane (PDMS), was de- signed. The influence of crosslinldng degree of the gutter layer on membrane performance was investigated. As a result, a Pebardamino- PDMS/PAN multilayer membrane with hexane resistance was developed, showing CO2 permeance of 350 GPU and CO2/N2 selectivity over 50. The blend of polyethylene glycol dimethyl ether (PEG-DME) with Pebax as coating material was studied to further improve the membrane performance. After being combined with PEG-DME additive, CO2 permeance of the final Pebax-PEG-DME/amino-PDMS/PAN composite membrane reached 400 GPU above with CO2/Na selectivity over 65.
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关 键 词: | 二甲基醚 复合膜 CO2 制备 捕获 酰胺 嵌段 渗透性能 |
Preparation of composite poly(ether block amide) membrane for CO2 capture |
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Authors: | Lianjun Wang Yang Li Shuguang Li Pengfei Ji Chengzhang Jiang |
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Institution: | 1. Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China 2. Dalian Eurof ilm Industrial Ltd., Dalian 116035, Liaoning, China 3. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China |
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Abstract: | In this study, a poly(ether block amide)(Pebax 1657) composite membrane applied for CO2 capture was prepared by coating Pebax 1657 solution on polyacrylonitrile(PAN) ultrafiltration membrane. Ethanol/water mixture was used as the solvent of Pebax and the effects of ethanol/water mass ratios and Pebax concentration on the permeation properties of composite membrane were studied. To enhance the composite membrane permeance, the gutter layer, made from reactive amino silicone crosslinking with polydimethylsiloxane(PDMS), was designed. The influence of crosslinking degree of the gutter layer on membrane performance was investigated. As a result, a Pebax/aminoPDMS/PAN multilayer membrane with hexane resistance was developed, showing CO2 permeance of 350 GPU and CO2/N2 selectivity over50. The blend of polyethylene glycol dimethyl ether(PEG-DME) with Pebax as coating material was studied to further improve the membrane performance. After being combined with PEG-DME additive, CO2 permeance of the final Pebax-PEG-DME/amino-PDMS/PAN composite membrane reached 400 GPU above with CO2/N2 selectivity over 65. |
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Keywords: | CO2 capture composite membrane gutter layer coating |
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