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Catalysts 2019, 9(4), 358; https://doi.org/10.3390/catal9040358

Analysis of Mass Transport through Anisotropic, Catalytic/Bio-Catalytic Membrane Reactors

Chemical and Biochemical Procedures Laboratory, Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary
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Received: 1 March 2019 / Revised: 2 April 2019 / Accepted: 7 April 2019 / Published: 13 April 2019
(This article belongs to the Special Issue Reactors and Models in Catalysis)
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Abstract

This paper investigated the steady-state mass transport process through anisotropic, composite membrane layers with variable mass transport coefficients, such as the diffusion coefficient, convective velocity, or chemical/biochemical reaction rate constant. The transfer processes can be a solution-diffusion model or diffusive plus convective process. In the theoretical part, the concentration distribution as well as the inlet and outlet mass transfer rates’ expressions are defined for physical transport processes with variable diffusion or solubility coefficients and then that for transport processes accompanied by first- and zero-order reactions, in the presence of diffusive and convective flow, with constant and variable parameters. The variation of the transport parameters as a function of the local coordinate was defined by linear equations. It was shown that the increasing diffusion coefficient or convective flow induces much lower concentrations across the membrane layer than transport processes, with their decreasing values a function of the space coordinate. Accordingly, this can strongly affect the effect of the concentration dependent chemical/biochemical reaction. The inlet mass transfer rate can also be mostly higher when the transport parameter decreases across the anisotropic membrane layer. View Full-Text
Keywords: transport across anisotropic membrane; variable diffusion coefficient; variable convective velocity; first-order reaction; zero-order reaction; inlet mass transfer rate; outlet mass transfer rate transport across anisotropic membrane; variable diffusion coefficient; variable convective velocity; first-order reaction; zero-order reaction; inlet mass transfer rate; outlet mass transfer rate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Nagy, E.; Vitai, M. Analysis of Mass Transport through Anisotropic, Catalytic/Bio-Catalytic Membrane Reactors. Catalysts 2019, 9, 358.

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