Correlations between Penetrant Properties and Infinite Dilution Gas Solubility in Glassy Polymers:  NELF Model Derivation

2007 ◽  
Vol 46 (23) ◽  
pp. 7645-7656 ◽  
Author(s):  
Maria Grazia De Angelis ◽  
Giulio C. Sarti ◽  
Ferruccio Doghieri
Keyword(s):  
Infinite Dilution ◽  
Glassy Polymers ◽  
Gas Solubility ◽  
Model Derivation

NELF model prediction of the infinite dilution gas solubility in glassy polymers

2007 ◽  
Vol 289 (1-2) ◽  
pp. 106-122 ◽  
Author(s):  
M.G. De Angelis ◽  
G.C. Sarti ◽  
F. Doghieri
Keyword(s):  
Model Prediction ◽  
Infinite Dilution ◽  
Glassy Polymers ◽  
Gas Solubility

Gas solubility in glassy polymers—a correlation with excess enthalpy

Polymer ◽  
1992 ◽  
Vol 33 (8) ◽  
pp. 1696-1700 ◽  
Author(s):  
D.H. Rein ◽  
R.F. Baddour ◽  
R.E. Cohen
Keyword(s):  
Excess Enthalpy ◽  
Glassy Polymers ◽  
Gas Solubility

A novel model to predict infinite dilution solubility coefficients in glassy polymers

2016 ◽  
Vol 55 (3) ◽  
pp. 228-244 ◽  
Author(s):  
Mikhail Goubko ◽  
Oleg Miloserdov ◽  
Yuri Yampolskii ◽  
Alexander Alentiev ◽  
Victoria Ryzhikh
Keyword(s):  
Infinite Dilution ◽  
Glassy Polymers ◽  
Solubility Coefficients ◽  
Novel Model

scholarly journals Experimental Mixed-Gas Permeability, Sorption and Diffusion of CO2-CH4 Mixtures in 6FDA-mPDA Polyimide Membrane: Unveiling the Effect of Competitive Sorption on Permeability Selectivity

Membranes ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 10 ◽  
Author(s):  
Giuseppe Genduso ◽  
Bader Ghanem ◽  
Ingo Pinnau
Keyword(s):  
Infinite Dilution ◽  
Gas Permeability ◽  
Diffusion Theory ◽  
Linear Trend ◽  
Effective Diffusion ◽  
Gas Diffusion ◽  
Competitive Sorption ◽  
Gas Solubility ◽  
Mixed Gas ◽  
Polyimide Membrane

The nonideal behavior of polymeric membranes during separation of gas mixtures can be quantified via the solution-diffusion theory from experimental mixed-gas solubility and permeability coefficients. In this study, CO2-CH4 mixtures were sorbed at 35 °C in 4,4′-(hexafluoroisopropylidene)diphthalic dianhydride (6FDA)-m-phenylenediamine (mPDA)—a polyimide of remarkable performance. The existence of a linear trend for all data of mixed-gas CO2 versus CH4 solubility coefficients—regardless of mixture concentration—was observed for 6FDA-mPDA and other polymeric films; the slope of this trend was identified as the ratio of gas solubilities at infinite dilution. The CO2/CH4 mixed-gas solubility selectivity of 6FDA-mPDA and previously reported polymers was higher than the equimolar pure-gas value and increased with pressure from the infinite dilution value. The analysis of CO2-CH4 mixed-gas concentration-averaged effective diffusion coefficients of equimolar feeds showed that CO2 diffusivity was not affected by CH4. Our data indicate that the decrease of CO2/CH4 mixed-gas diffusion, and permeability selectivity from the pure-gas values, resulted from an increase in the methane diffusion coefficient in mixtures. This effect was the result of an alteration of the size sieving properties of 6FDA-mPDA as a consequence of CO2 presence in the 6FDA-mPDA film matrix.

Gas solubility in glassy polymers: predictions from non-equilibrium EoS

Desalination ◽  
2002 ◽  
Vol 144 (1-3) ◽  
pp. 73-78 ◽  
Author(s):  
F. Doghieri ◽  
M. Ghedini ◽  
M. Quinzi ◽  
D. Rethwisch ◽  
G.C. Sarti
Keyword(s):  
Glassy Polymers ◽  
Gas Solubility ◽  
Non Equilibrium
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