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Separation of thiophene using SiO2 and Ag+-SiO2 filled polyether block amide (PEBAX) composited membranes via pervaporation

Authors： LIU Kun*, HAN Jian-jian, Fu xia-na, Cheng jing-jing

Units： Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China

KeyWords： polyether block amide (PEBAX); SiO2; membrane; pervaporation; thiophene

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2015, 35(4):7-12

Abstract：

Silica microspheres and silver/silica core–shell microspheres were prepared by the method of Stöber. Composite membrane of polyether block amide /polyacrylonitrile (PEBAX/PAN) and mixed matrix membranes with nano-fumed silica, silica microspheres and Ag+-SiO2 core–shell microspheres as the filler, were prepared. The formation and composition of the particles before modified and after were characterized by XRD and FTIR, respectively. The structure morphology of Ag+-SiO2 core–shell microspheres and the membranes were respectively characterized by SEM. In addition, swelling situation of membranes was explored. The experimental results display that the swelling degree of the membranes in model gasoline with thiophene and n-heptane increases with thiophene content. The swelling degree of the membranes as follow: Ag+-SiO2 filled membrane（PMSA）> nano-fumed silica filled membrane（PMS1）> silica microspheres（PMS2）> composite membrane（PM）. The separation abilities to thiophene of four membranes were systematically investigated by pervaporation experiments. That experimental results showed that separation factor of three filled-composite membranes all was intensified, but their fluxes decreased slightly. It also exhibited the PMSA has the best separation performance, its separation factor and the total flux were 4.2 and 2.8kg·m-2·h-1 respectively, under the thiophene concentration 1000ppm and at 30℃.

Funds：

广西石化资源加工及过程强化技术重点实验室主任基金（2013Z009）；广西自然科学基金（2014jjAA20079）

AuthorIntro：

刘琨（1962—），女，广西南宁，博士，教授，广西大学化学化工学院博士生导师，主要从事膜分离研究。

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