| PTFE多孔膜气体渗透数学模型和膜孔结构的影响 |
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| 引用本文： | 张秀莉,张卫东,郝新敏,张慧峰,张泽廷,张建春. PTFE多孔膜气体渗透数学模型和膜孔结构的影响[J]. 中国化学工程学报, 2003, 11(4): 383-387 |
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| 作者姓名： | 张秀莉 张卫东 郝新敏 张慧峰 张泽廷 张建春 |
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| 作者单位： | [1]CollegeofChemicalEngineering,BeijingUniversityofChemicalTechnolok-T,Beijing100029.China [2]TextileInstitute,DonghuaUniversity,Shanghai200051,China |
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| 基金项目： | Supported by the 863 Hi-Tech. Research and Development Program of China (No. 2002AA649280, No. 2002AA304030),National Natural Science Foundation of China (No. 20206002), Beijing NOVA program (H013610250112), University Doctor Science Foundation of China |
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| 摘 要： | Membrane-based separation processes are new technology combined membrane separation with conventional separation. Hydrophobic porous membranes are often used in these processes. The structure of hydrophobic porous membrane has significant effect on mass transfer process. The permeabilities of five kinds of gas, He, N2,O2, CO2 and water vapor, across six polytetrafluoroethylene(PTFE) fiat membranes were tested experimentally.Results indicated that the greater the membrane mean pore size and the wider the pore size distribution are, the higher the gas permeability. A gas permeation model, including the effects of membrane structure parameter and gas properties, was established. A comprehensive characteristic parameter (including porosity, thickness and tortuosity) was found more effective to express the influence of membrane structure in gas permeation process. The predicted permeation coefficients were in good agreement with experimental data.
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| 关 键 词： | PTFE多孔膜 气体渗透 数学模型 膜孔结构 聚四氟乙烯 膜分离工艺 质量交换 |
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Mathematical Model of Gas Permeation Through PTFE Porous Membrane and the Effect of Membrane Pore Structure |
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| ZHANG Xiuli,ZHANG Weidong,HAO Xinmin,ZHANG Huifeng,ZHANG Zeting,ZHANG Jianchun. Mathematical Model of Gas Permeation Through PTFE Porous Membrane and the Effect of Membrane Pore Structure[J]. Chinese Journal of Chemical Engineering, 2003, 11(4): 383-387 |
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| Authors: | ZHANG Xiuli ZHANG Weidong HAO Xinmin ZHANG Huifeng ZHANG Zeting ZHANG Jianchun |
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| Affiliation: | College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China Textile Institute, Donghua University, Shanghai 200051, China |
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| Abstract: | Membrane-based separation processes are new technology combined membrane separation with conventional separation. Hydrophobic porous membranes are often used in these processes. The structure of hydrophobic porous membrane has significant effect on mass transfer process. The permeabilities of five kinds of gas, He, N2, O2, CO2 and water vapor, across six polytetrafluoroethylene(PTFE) flat membranes were tested experimentally. Results indicated that the greater the membrane mean pore size and the wider the pore size distribution are, the higher the gas permeability. A gas permeation model, including the effects of membrane structure parameter and gas properties, was established. A comprehensive characteristic parameter (including porosity, thickness and tortuosity) was found more effective to express the influence of membrane structure in gas permeation process. The predicted permeation coefficients were in good agreement with experimental data. |
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| Keywords: | porous membrane gas permeability mathematical model |
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