Open Access
Membranes, volume 11, issue 11, pages 833
Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model
Publication type: Journal Article
Publication date: 2021-10-28
PubMed ID:
34832062
Process Chemistry and Technology
Chemical Engineering (miscellaneous)
Filtration and Separation
Abstract
An approximate model based on friction-coefficient formalism is developed to predict the mixed-gas permeability and selectivity of polymeric membranes. More specifically, the model is a modification of Kedem’s approach to flux coupling. The crucial assumption of the developed model is the division of the inverse local permeability of the mixture component into two terms: the inverse local permeability of the corresponding pure gas and the term proportional to the friction between penetrants. Analytical expressions for permeability and selectivity of polymeric membranes in mixed-gas conditions were obtained within the model. The input parameters for the model are ideal selectivity and solubility coefficients for pure gases. Calculations have shown that, depending on the input parameters and the value of the membrane Peclét number (the measure of coupling), there can be both a reduction and an enhancement of selectivity compared to the ideal selectivity. The deviation between real and ideal selectivity increases at higher Peclét numbers; in the limit of large Peclét numbers, the mixed-gas selectivity tends to the value of the ideal solubility selectivity. The model has been validated using literature data on mixed-gas separation of n-butane/methane and propylene/propane through polymeric membranes.
Citations by journals
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1
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Membranes
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Membranes
1 publication, 25%
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Progress in Energy and Combustion Science
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Progress in Energy and Combustion Science
1 publication, 25%
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Industrial & Engineering Chemistry Research
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Industrial & Engineering Chemistry Research
1 publication, 25%
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Biomicrofluidics
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Biomicrofluidics
1 publication, 25%
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1
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Citations by publishers
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1
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 25%
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Elsevier
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Elsevier
1 publication, 25%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
1 publication, 25%
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American Institute of Physics (AIP)
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American Institute of Physics (AIP)
1 publication, 25%
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1
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Malakhov A. O., Volkov V. V. Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model // Membranes. 2021. Vol. 11. No. 11. p. 833.
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Malakhov A. O., Volkov V. V. Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model // Membranes. 2021. Vol. 11. No. 11. p. 833.
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TY - JOUR
DO - 10.3390/membranes11110833
UR - https://doi.org/10.3390%2Fmembranes11110833
TI - Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model
T2 - Membranes
AU - Malakhov, Alexander O
AU - Volkov, Vladimir V
PY - 2021
DA - 2021/10/28 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 833
IS - 11
VL - 11
PMID - 34832062
SN - 2077-0375
ER -
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@article{2021_Malakhov,
author = {Alexander O Malakhov and Vladimir V Volkov},
title = {Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model},
journal = {Membranes},
year = {2021},
volume = {11},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {oct},
url = {https://doi.org/10.3390%2Fmembranes11110833},
number = {11},
pages = {833},
doi = {10.3390/membranes11110833}
}
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Malakhov, Alexander O., and Vladimir V Volkov. “Mixed-Gas Selectivity Based on Pure Gas Permeation Measurements: An Approximate Model.” Membranes, vol. 11, no. 11, Oct. 2021, p. 833. https://doi.org/10.3390%2Fmembranes11110833.
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