Separation of Sulfur/Gasoline Mixture with Polydimethylsiloxane/ Polyetherimide Composite Membranes by Pervaporatlon  

作　　者：赵长伟 李继定 陈剑 亓荣彬 栾兆坤 

机构地区：[1]State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Beijing 100085, China [2]Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Chemical Engineering》2009年第4期707-710,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Basic Research Program of China(2009CB623404);the National Natural Science Foundation of China(50708109,20736003);the National High Technology Research and Development Program of China(2007AA06Z317)

摘　　要：Worldwide environment has resulted in a limit on the sulfur content of gasoline.It is urgent to investigate the desulfurization of gasoline.The polydimethylsiloxane(PDMS)/polyetherimide(PEI)composite membranes were prepared by casting a PDMS solution onto porous PEI substrates and characterized by scanning electron microscope(SEM).The membranes were used for sulfur removal from gasoline by pervaporation.The effects of feed temperature,sulfur content in the feed and PDMS layer thickness on membrane performance were investigated,and an activation energy of permeation was obtained.Experimental results indicated that higher feed temperature yielded higher total flux and lower sulfur enrichment factor.The total flux varied little with the increase of sulfur content in the feed,but the sulfur enrichment factor first increased with the amount of thiophene added into the gasoline,and then the variation was little.The increase of PDMS layer thickness resulted in a smaller flux but a larger sulfur enrichment factor.The result indicates that the PDMS/PEI composite membranes are promising for desulfurization by pervaporation.Worldwide environment has resulted in a limit on the sulfur content of gasoline. It is urgent to investi-gate the desulfurization of gasoline. The polydimethylsiloxane （PDMS）/polyetherimide （PEI） composite membranes were prepared by casting a PDMS solution onto porous PEI substrates and characterized by scanning electron microscope （SEM）. The membranes were used for sulfur removal from gasoline by pervaporation. The effects of feed temperature, sulfur content in the feed and PDMS layer thickness on membrane performance were investi- gated, and an activation energy of permeation was obtained. Experimental results indicated that higher feed temperature yielded higher total flux and lower sulfur enrichment factor. The total flux varied little with the increase of sulfur content in the feed, but the sulfur enrichment factor first increased with the amount of thiophene added into the gasoline, and then the variation was little. The increase of PDMS layer thickness resulted in a smaller flux but a larger sulfur enrichment factor. The result indicates that the PDMS/PEI composite membranes are promising for desulfurization by pervaporation.

关 键 词：polydimethylsiloxane （PDMS）/polyetherimide （PEI） composite membranes sulfur removal GASOLINE PERVAPORATION 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] O634.41[理学—高分子化学]