2017
DOI: 10.25518/0037-9565.6628
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CO2/CH4 Sorption Behavior of Glassy Polymeric Membranes Based on Dual Mode Sorption Model

Abstract: Among the various transport models for gas separation via membrane, the best description is done by solution-diffusion model. The main parameters of this model are the sorption and diffusion of the penetrant through the membrane. Studies conducted by various researchers in the field of gas separation indicate that the thermodynamic interaction (sorption effects) in glassy polymers has the major role in the diffusivity, permeability, and selectivity of the membrane, especially in the multi-component gas mixture… Show more

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Cited by 6 publications
(2 citation statements)
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“…As for M4 ( Figure 8 b), which contained 1 wt.% of MgO nanosheet filler, CO 2 permeability dropped very slightly from 1929 Barrer to 1722 Barrer with no improvement of CO 2 /N 2 and CO 2 /CH 4 ideal selectivity as a function of upstream pressure. This behaviour can be explained with the dual-sorption model, where the sorption of gas molecule to the rubbery phase of polymer is governed by Henry’s law, while the adsorption of gas molecule in the microvoid region of the polymer is described by Langmuir’s behaviour [ 73 , 89 ]. At first, CO 2 solubility increased with pressure in accordance with Henry’s law but soon became obsolete at higher pressure due to shrinkage of the microvoid inside the polymer due to Langmuir’s behaviour [ 90 ].…”
Section: Resultsmentioning
confidence: 99%
“…As for M4 ( Figure 8 b), which contained 1 wt.% of MgO nanosheet filler, CO 2 permeability dropped very slightly from 1929 Barrer to 1722 Barrer with no improvement of CO 2 /N 2 and CO 2 /CH 4 ideal selectivity as a function of upstream pressure. This behaviour can be explained with the dual-sorption model, where the sorption of gas molecule to the rubbery phase of polymer is governed by Henry’s law, while the adsorption of gas molecule in the microvoid region of the polymer is described by Langmuir’s behaviour [ 73 , 89 ]. At first, CO 2 solubility increased with pressure in accordance with Henry’s law but soon became obsolete at higher pressure due to shrinkage of the microvoid inside the polymer due to Langmuir’s behaviour [ 90 ].…”
Section: Resultsmentioning
confidence: 99%
“…Likewise, the synthesis of copolyimides including 3,5-diamino benzoic acid (DABA), which has an acid group (-COOH) of high polarity, has been the subject of exhaustive study due to the great versatility of functionalization provided by the carboxylic group [31,[60][61][62][63].…”
Section: Introductionmentioning
confidence: 99%