Diffusion in Partially Ion Exchanged Molecular Sieves

Autor:	D. M. Ruthven
Rok vydání:	1974
Předmět:	Computer simulation Ion exchange Chemistry Diffusion Organic Chemistry Inorganic chemistry Thermodynamics General Chemistry Thermal diffusivity Molecular sieve Catalysis Ion
Zdroj:	Canadian Journal of Chemistry. 52:3523-3528
ISSN:	1480-3291 0008-4042
Popis:	Results of a simple idealized numerical simulation are presented showing the variation of sorbate diffusivity with degree of ion exchange in a system such as the Na–Ca A zeolites. Theoretical curves showing the expected variation of diffusivity, diffusional activation energy, and pre-exponential factor are given. The pattern of behavior predicted depends on the ratio of the diffusivities for the extreme ionic forms. When this ratio is small there is a gradual variation in diffusivity, activation energy, and pre-exponential factor over the entire range of ionic compositions but for large ratios there is an abrupt change at a particular ionic composition. Limited experimental data for the diffusion of n-butane in partially Ca2+ exchanged 4A sieve are presented and interpreted in terms of the theoretical model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56f1befe0c3b75f0f9094da7e6f47d9c https://doi.org/10.1139/v74-523 Zobrazit plný text záznamu