Permeation behavior for mixed gases in poly (4-methyl-1-pentene) membrane near the glass transition temperature
| Autor: | Eizo Sada, H. Kumazawa, B. Messaoudi, K. Inamori |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Chemistry
Hydrostatic pressure Plasticizer 4-Methyl-1-pentene Filtration and Separation Permeation Biochemistry chemistry.chemical_compound Membrane Chemical engineering Permeability (electromagnetism) Homogeneous Polymer chemistry General Materials Science Physical and Theoretical Chemistry Glass transition |
| Zdroj: | Journal of Membrane Science. 97:7-12 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/0376-7388(94)00143-m |
| Popis: | Permeabilities to CO 2 in an equimolar mixture of CO 2 and air for a homogeneous poly (4-methyl-1-pentene) membrane were measured at various upstream gas pressures. The permeability to CO 2 for the mixed gas was smaller than that for pure CO 2 at the same CO 2 upstream pressure. The permeability to O 2 for the mixed gas increased with increasing upstream gas pressure, although for pure O 2 the permeability was independent of pressure. Such experimental evidence is consistent with the free-volume model prediction. The increase in permeabilities for the coexisting O 2 might result from the membrane plasticization action of sorbed CO 2 . The depression of CO 2 permeability in the gas mixture case might be ascribed to the hydrostatic pressure effect applied to the system, as suggested by the free-volume model. |
| Databáze: | OpenAIRE |
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