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Rigorous modeling of gas permeation behavior in facilitated transport membranes (FTMs); evaluation of carrier saturation effects and double‐reaction mechanism
Author(s) -
Ebadi Amooghin Abtin,
Moftakhari Sharifzadeh Mohammad Mehdi,
Zamani Pedram Mona
Publication year - 2018
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1750
Subject(s) - permeation , chemistry , membrane , permeance , zwitterion , saturation (graph theory) , facilitated diffusion , diffusion , permeability (electromagnetism) , lipophilicity , thermodynamics , computational chemistry , analytical chemistry (journal) , chromatography , stereochemistry , molecule , organic chemistry , physics , biochemistry , mathematics , combinatorics
Abstract In this work, a general model for the gas permeation behavior of facilitated transport membranes (FTMs) has been developed. The importance of developing a clearer understanding of FTM permeation behavior by introducing a detailed two‐dimensional FTM model was demonstrated. This model accounts for the effects of partial pressure on permeance by considering the carrier saturation‐state phenomenon and reaction‐diffusion portions in FTMs. The model is based on a first order double‐step reaction mechanism with respect to the role of the concentration of zwitterion ions in the facilitated transport of CO 2 . It is shown here that the individual values of reaction constant rates and diffusion coefficients of components in the chemical reaction, which belong to the FTM condition, have been determined by the FTMs’ permeability and were not guessed or calculated. Overall, this work provides a method for the more reliable use of models to understand and design of FTMs, and to better comprehend the large and growing body of experimental data on these kinds of membranes. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.