Journal of Industrial and Engineering Chemistry, Vol.20, No.4, 1493-1504, July, 2014
Investigation of convection and diffusion during biodiesel production in packed membrane reactor using 3D simulation
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The 3D simulation of convection and diffusion phenomena within a ceramic membrane during
transesterification reaction was the aim of this study. The ceramic membrane was a tubular micro porous TiO2/Al2O3 packed with the heterogeneous catalyst. The Navier-Stokes, Brinkman and Stephan-Maxwell equations were applied for investigation of fluid flow reaction and mass transfer within the system. The value of the convection was generally between 10^(4) and 10^(7) times higher than diffusion. It depends on concentration component, the diffusion coefficient and components velocity. A good agreement was found with the maximum deviation of 8% from experimental data.
Keywords:Transesterification;Membrane reactor;Computational fluid dynamics (CFD);Brinkman equations;Stephan-Maxwell equation
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