By Endre Nagy

With an in depth research of the mass delivery via membrane layers and its influence on diverse separation procedures, this e-book presents a accomplished examine the theoretical and sensible elements of membrane delivery homes and features. uncomplicated equations for each membrane are supplied to foretell the mass move price, the focus distribution, the convective speed, the separation potency, and the impact of chemical or biochemical response bearing in mind the heterogeneity of the membrane layer to aid greater comprehend the mechanisms of the separation tactics. The reader may be capable of describe membrane separation methods and the membrane reactors in addition to opt for the main compatible membrane constitution for separation and for membrane reactor. Containing specified dialogue of the newest ends up in shipping techniques and separation methods, this e-book is key for chemistry scholars and practitioners of chemical engineering and procedure engineering.

  • Detailed survey of the theoretical and sensible elements of each membrane approach with particular equations
  • Practical examples mentioned intimately with transparent steps
  • Will help in making plans and instruction of extra effective membrane constitution separation

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Extra resources for Basic Equations of the Mass Transport through a Membrane Layer

Sample text

Accordingly, the source term can be strongly different for a membrane reactor with dispersed catalyst particles or that for an intrinsically catalytic membrane layer. The mathematical description of the mass transport through these membrane layers can be different depending on the size of the catalytic particle. Thus, presentation of the mass transport equations is divided into two parts, namely: 1. Mass transport through intrinsically catalytic or nanometer-sized catalytic particles are dispersed in the membrane layer; in this case, it can be assumed that the mass transport inside the catalytic particles or the mass transport to the catalytic interface is instantaneous and catalytic particles can be located in every differential volume element of the membrane; accordingly, the membrane can be regarded as a continuous catalytic layer.

The model is based on the idea that the chain elements arrange themselves randomly on a three-dimensional structure. The resulting equation for the activity of the solvent is a simple proportional function of the volume fraction of the solvent. Note that the volume fraction is 26 Basic Equations of the Mass Transport through a Membrane Layer denoted here by ε to distinguish it from the φ concentration [εi 5 φiVi/Mi, where Mi is molar weight (kg/kmol); Vi is molar volume of i (kmol/m3); and εi is the volume fraction (m3/m3)].

Catalysis Today 67, 205À216. , and Seidel-Morgenstern, A. (2001) An experimental study of combined gas phase and surface diffusion in porous glass. J. Membr. Sci. 140, 165À184. A. (1999) Modeling permeation of binary mixtures through zeolite membranes. AIChE J. 45, 497À511. Vignes, A. (1966) Diffusion in binary solutions. Ind. Eng. Chem. Fund. 5, 189À199. , and Krishna, R. (1990) Mass Transfer. K. , and Krishna, R. (2000) Mass Transfer in Multicomponent Mixture. Delft University Press, Delft. G.

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