| PVA/PEI共混膜对于碳酸二甲酯与二氧化碳体系的分离效果 |
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| 引用本文： | 张飚,郭长鹤,余立新. PVA/PEI共混膜对于碳酸二甲酯与二氧化碳体系的分离效果[J]. 膜科学与技术, 2012, 32(2): 36-40 |
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| 作者姓名： | 张飚 郭长鹤 余立新 |
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| 作者单位： | 清华大学化工系化学工程联合国家重点实验室,北京,100084 |
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| 摘 要： | 针对碳酸二甲酯/二氧化碳(DMC/CO2)体系制备有较好分离效果的膜,选取聚乙烯亚胺(PEI)作为膜中运输二氧化碳的载体分子,有良好成膜性的聚乙烯醇作为膜的基础材料.在一般情况下,该膜对于纯二氧化碳的通量随着聚乙烯亚胺含量的增加而增大.对DMC/CO2体系的渗透通量随着聚乙烯亚胺含量的增加、压力差的提高和温度的升高而增大,分离因子随聚乙烯亚胺含量发生变化,随压力变化不大,随温度升高而降低.在30℃,压力差0.5MPa,温度20℃下,当聚乙烯亚胺含量达到40%,膜厚35μm时,分离因子为36,渗透通量为4.8g/(m2.h).
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| 关 键 词： | 碳酸二甲酯 聚乙烯亚胺 二氧化碳 膜分离 聚乙烯醇 |
Performance of poly (vinyl alcohol)-poly (ethylene imine) blend membrane for separation of dimethyl carbonate and CO2 |
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| ZHANG Biao , GUO Changhe , YU Lixin. Performance of poly (vinyl alcohol)-poly (ethylene imine) blend membrane for separation of dimethyl carbonate and CO2[J]. Membrane Science and Technology, 2012, 32(2): 36-40 |
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| Authors: | ZHANG Biao GUO Changhe YU Lixin |
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| Affiliation: | (State Key Laboratory of Chemical Engineering,Department of Chemical Engineering, Tsinghua University,Beijing 100084,China) |
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| Abstract: | This study focuses on the preparation of the membrane for separation of dimethyl carbonate(DMC) and CO2 system.Poly(ethylene imine)(PEI) was selected as carrier to transport CO2.Poly(vinyl alcohol) was used as a base material.In general,the flux for pure CO2 increases with the PEI content increasing.Flux for the DMC/CO2 system increases with the increasing of PEI content and the pressure difference.The separation factor changes much with the content of PEI,but little with pressure.At 20 ℃,0.5 MPa pressure difference,40% of PEI mass fraction,and membrane thickness of 35 μm,the separation factor is 36,and the flux is 4.8 g/(m2·h). |
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| Keywords: | dimethyl carbonate poly(ethylene imine) CO2 membrane separation poly(vinyl alcohol) |
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