Download Basic Equations of the Mass Transport through a Membrane by Endre Nagy PDF
By Endre Nagy
With an in depth research of the mass shipping via membrane layers and its influence on varied separation techniques, this ebook presents a accomplished examine the theoretical and functional facets of membrane delivery homes and services. easy equations for each membrane are supplied to foretell the mass move cost, the focus distribution, the convective speed, the separation potency, and the influence of chemical or biochemical response taking into consideration the heterogeneity of the membrane layer to assist greater comprehend the mechanisms of the separation strategies. The reader can be capable of describe membrane separation techniques and the membrane reactors in addition to select the main appropriate membrane constitution for separation and for membrane reactor. Containing specified dialogue of the newest ends up in delivery approaches and separation approaches, this e-book is key for chemistry scholars and practitioners of chemical engineering and strategy engineering.
- Detailed survey of the theoretical and sensible points of each membrane technique with particular equations
- Practical examples mentioned intimately with transparent steps
- Will help in making plans and guidance of extra effective membrane constitution separation
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Additional resources for Basic Equations of the Mass Transport through a Membrane Layer
46, 3904À3911. , and Krishna, R. (2007b) Interpreting unary, binary and ternary mixture permeation cross a SAPO-34 membrane with loading-dependent MaxwellÀStefan diffusivities. J. Phys. Chem. C 111, 5075À5082. -Y. (2004) Pervaporation of benzene/cyclohexane mixtures using ion-exchange membrane containing copper ions. J. Membr. Sci. 240, 149À158. L. (2006) Modelling transient permeation of binary mixtures through zeolite membrane. Ind. Eng. Chem. Res. 45, 6032À6043. P. (1983) Gas Transport in Porous Media: The Dusty Gas Model.
14) is well known: φ 5 TeϑY 1Se2ϑY ð4:16Þ For the sake of generalization, in the boundary conditions we should take into account the external mass transfer resistance on both sides of the membrane, though it should be noted that the role of the β oδ will be gradually diminished with the increase of the reaction rate. At the end of this subsection, the limiting cases will also be given briefly. Thus (both sides of boundary conditions are divided by co) it becomes 88 Basic Equations of the Mass Transport through a Membrane Layer Y 5 0; Y 5 1; β of ðco 2 c Þ 5 2β dY Ã o dφ β ofδ ðcÃδ 2 coδ Þ 5 2β o ð4:17aÞ Y50 dφ dY Y51 ð4:17bÞ Parameters of Eq.
1 Source Term for Zero-Order Reaction The zero-order reaction is important primarily for biocatalytic reactions. That is why it will be briefly discussed here for the sake of completeness. 5 Typical concentration distribution for ultrafiltration mode at different values of the reaction modulus dφ/dy50 at y5δ. For intrinsically catalytic membranes, the source term is equal to k0 (Q 5 k0), where it is the reaction rate constant with a dimension of mol/m3/s. In the case of dispersed fine catalyst particles, the specific mass transfer rate should be given in order to use it as a reaction term in the mass balance equation given for the membrane phase.