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Sorption of CO 2 /CH 4 mixtures in poly(phenylene oxide) and a carboxylated derivative

1991; Wiley; Volume: 42; Issue: 9 Linguagem: Inglês

10.1002/app.1991.070420926

1097-4628

Brooks J. Story, William J. Koros,

Carbon dioxide utilization in catalysis

Abstract The sorption of CO 2 and CH 4 and their binary mixtures in poly(phenlene oxide) (PPO) and its carboxylated derivative (CPPO) is reported. All mixed gas data are accurately described by the dual model sorption model, which predicts mixed gas sorption on the basis of pure gas sorption parameters. The present paper extends the mixed gas sorption data base to include polymers having a wide range of permeabilities and chemical structures. The confirmed accuracy of the model for these systems provides strong support for applying the mixed gas dual mode sorption model to any gas/polymer system. A numerical simulation of the mixed gas sorption experiment is also presented which greatly simplifies the experimental procedures used to maintain the partial pressure of one of the gas components at a constant value over the course of a sorption isotherm measurement. By establishing the appropriate amounts of each gas component which are added to the polymer sample chamber of the sorption cell, the mixed gas apparatus simulator (MIGAS) can be used to maintain the partial pressure of one of the components to within 1% of the desired value.