A Phenomenological Theory of Diffusion in Heterogeneous Media and Its Use in Describing Membrane Separation Processes

Autor:	I P Romanovskii, I N Bekman
Rok vydání:	1988
Předmět:	Structure (mathematical logic) Permeability (earth sciences) Modelling methods Chemistry Bibliography General Chemistry Statistical physics Diffusion (business) Type (model theory) Dispersion (chemistry) Membrane technology
Zdroj:	Russian Chemical Reviews. 57:530-538
ISSN:	1468-4837 0036-021X
DOI:	10.1070/rc1988v057n06abeh003369
Popis:	Within the framework of a unified methodical treatment a critical analysis is given of different methods for the phenomenological description of the processes of the gas permeability of heterogeneous media: lamellar, dispersion type, containing individual inclusions, etc. The introduction of a continuous geometrical factor allows generalised expressions for the effective transport parameters to be obtained. Mathematical modelling methods are used to check the adequacy of the mathematical apparatus considered. The prospects for a directed choice of the structure of the material for controlling the efficiency and selectivity of a gas-separating membrane are investigated. The bibliography includes 50 references.
Databáze:	OpenAIRE
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