Impact of Concentration Polarization Phenomena on Gas Separation Processes with High-Performance Zeolite Membranes: Experiments vs. Simulations

被引:4
作者
Abdul Majid, Omar [1 ]
Kuznetsova, Margarita [1 ]
Castel, Christophe [1 ]
Favre, Eric [1 ]
Hreiz, Rainier [1 ]
机构
[1] Univ Lorraine, CNRS, LRGP, F-54000 Nancy, France
关键词
gas; separation; process; polarization; zeolite; simulation; COMPUTATIONAL FLUID-DYNAMICS; PERMEATION; MODULES; SURFACE;
D O I
10.3390/membranes14020041
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Polarization phenomena play a key role in membrane separation processes but remain largely unexplored for gas separations, where the mass transfer resistance is most often limited to the membrane. This assumption, which is commonly used today for the simulation of membrane gas separations, has to be reconsidered when high-performance materials, showing a very high permeance and/or selectivity, are used. In this study, a series of steady-state separation performances experimentally obtained on CO2/CH4 mixtures with a zeolite membrane are compared to the predictions of a dedicated 1D approach, recently derived and validated through CFD simulations. Polarization effects are shown to generate a significant negative impact on the separation performances, both in terms of the productivity and separation efficiency. The 1D model predictions, based on pure gas permeance data and without any adjustable parameters, are in very good agreement with the experimental data. This fast and efficient modeling approach can easily be implemented in simulation or process synthesis programs for the rigorous evaluation of membrane gas separation processes, when high-performance materials are used.
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页数:15
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