Total mass transport through a nonhomogeneous membrane |
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| Affiliation: | 1. Department of Chemical Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran;2. Chemical Engineering Faculty, Urmia University of Technology, Urmia, Iran;3. Institute on Membrane Technology of the Italian National Research Council (CNR-ITM), via P. Bucci 17C, Rende, (CS) – 87036, Italy;1. Department of Chemical, Petroleum and Gas Engineering, Shiraz University of Technology, Shiraz, Iran;2. Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal;3. CQE, Centro de Química Estrutural, Av. Rovisco Pais, 1049-001, Lisboa, Portugal;4. Hydrogenia, Via Roma 8/2, 16121, Genoa, Italy |
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| Abstract: | A recent analysis of total mass transport through a homogeneous membrane is generalized to the case of membrane nonuniformity as well as the presence of irreversible, firstorder degradation or hydrolysis. The results show that for initial conditions where none of the transported mass is present in the membrane, the total mass transported is just the ratio of the time integral of the mass concentration on the donor side of the membrane to the effective steady-state resistance of the membrane. Four specific cases are considered which can be applied to the transport analysis of biological membranes such as the skin and the cornea. |
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