Noble gases as indicators of molecular-selective gas transport in polymeric membranes

Beckman, I.N.; Golub, A.; Yakovlev, A. V.; Teplyakov, V. V.

doi:10.1134/s0965544113070050

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…We suggest to extend the statistical thermodynamic approach used for the gas-polymer systems earlier [20] for the estimation of S and ∆H S of the lower hydrocarbons in polymers. The approach is based on the gas solubility analogy in liquids and polymers, setting the monomer unit as an 'active' item of a solvent [20,27].…”

Section: Approach To Solubility Coefficient and Sorption Heat Estimatmentioning

confidence: 99%

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Combination of the Experimental and Theoretical Approaches for the Estimation of the C1–C4 Alkane Permeability Parameters in Poly (4-Methyl-2-Pentyne) and Poly (4-Methyl-1-Pentene)

Markova¹,

Zhmakin

Gries

et al. 2020

Applied Sciences

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Poly (4-methyl-2-pentyne) (PMPentyne) and poly (4-methyl-1-pentene) (PMPentene) as membrane gas-separating media were studied with a combination of experimental and theoretical approaches. Experimental approaches included the permeability measurements for C1–C4 alkanes in linear heating mode (for PMPentyne) and under isothermal conditions (for PMPentene), and diffusivity evaluation by a differential method for PMPentene. Theoretical approaches included the ‘hard-spheres’ theory for calculation of gas solubility in PMPentyne and gas transport theory for two-phase systems for the estimation of the amorphous and crystalline phases contribution in PMPentene. Correlation analysis was used for any type of gas transfer parameter calculation where experimental data were lacking. These combinations of methods allowed obtaining the whole set of parameters for any gas–polymer pairing and explained the butane-selective properties revealed in PMPentyne (C1 < C2 < C3 < C4) and methane-selective properties of PMPentene (C1 > C2 > C3 > C4).

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Section: Approach To Solubility Coefficient and Sorption Heat Estimatmentioning

confidence: 99%

“…To estimate the solubility contribution, we applied the previously used approach [15] for the calculation of the solubility coefficient of the C 1 -C 4 alkanes and the sorption heat (the 'hard-spheres' theory). For the main equations and some of the results see [27][28][29].…”

Section: Approach To Solubility Coefficient and Sorption Heat Estimatmentioning

confidence: 99%