Molecular-kinetic theory of gas permeation in molecular-sieve microporous membranes
- Worcester Polytechnic Institute, Worcester, MA (United States)
Molecular-kinetic theory of gas permeation and diffusion in molecular-sieve porous membranes is presented. The effect of adsorption and diffusion on the permeation is considered. At high temperatures, the adsorption of gases inside the pores does not affect the total transmembrane flux. However, at low temperatures the adsorption of gases inside the pores may significantly increase the gas permeability of the membranes. Definition of the isoconcentration temperature point is introduced and defined as the temperature at which the concentration inside the pores is equally distributed between the gas and the adsorbed phases. Below the isoconcentration temperature the total concentration inside the pores is determined by the adsorbed phase. Above the isoconcentration. point the concentration inside the pores is determined by the concentration in the gas phase. A comparison with experimental data on the permeability of CO{sub 2} in molecular-sieve glass membranes is provided.
- OSTI ID:
- 213090
- Report Number(s):
- CONF-940713--
- Country of Publication:
- United States
- Language:
- English
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