Diffusion of CH4 and CO2 in MFI, CHA and DDR zeolites

R. Krishna, J. M. van Baten, E. García-Pérez, Sofia Calero

Research output: Contribution to journalArticleAcademicpeer-review

64 Citations (Scopus)

Abstract

Molecular dynamics simulations were carried out to determine the self-diffusivities of CH4 and CO2 both for pure components and in 50-50 mixtures for a range of molar loadings in MFI, CHA and DDR zeolites. In CHA and DDR zeolites, that consist of cages separated by narrow windows, the inter-cage hopping of molecules occur practically independent of one another and, consequently, the diffusivities of pure components are the same as in the mixture. In sharp contrast, in MFI that consists of intersecting channels, the more mobile species is slowed down significantly in the mixture.

Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalChemical Physics Letters
Volume429
Issue number1-3
DOIs
Publication statusPublished - 29 Sep 2006
Externally publishedYes

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