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    題名: Pervaporation Performance Analysis and Prediction-Using a Hybrid Solution-Diffusion and Pore-Flow Model
    作者: Chang, Cheng-liang;Chang, Hsuan;Chang, Yuan-cheng
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Pervaporation;Solution-diffusion model;Pore model;Concentration polarization;Ethanol–water solution
    日期: 2007-01
    上傳時間: 2011-10-24 01:44:27 (UTC+8)
    出版者: Amsterdam: Elsevier BV
    摘要: A hybrid mathematic model for pervaporation is proposed which incorporates the concepts of solution-diffusion model and pore model. The model allows performance prediction as well as the establishment of the internal concentration and pressure profiles within the membrane. The model parameters specific to the particular membrane and mixture system are determined using liquid sorption and pervaporation experimental data. The model is experimentally examined using ethanol–water mixtures and poly(dimethyl siloxane)–poly(vinyldiene fluoride) (PDMS–PVDF) composite membranes. The characteristics of flux and separation factor predicted using the model are in fair agreement with the experimental data under various feed concentrations and downstream pressures for different membrane arrangements, including single-layer, reverse single-layer and double-layer PDMS–PVDF composite membranes. Internal profiles of pressure, concentration and component mole fraction can be established using the model. Concentration polarization phenomena for ethanol and water are located at membrane interfaces and vapor–liquid interfaces, respectively. Performances of several different membrane designs are compared using the model.
    關聯: Journal of The Chinese Institute of Chemical Engineers 38(1), pp.43-51
    DOI: 10.1016/j.jcice.2007.01.001
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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