Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 125, Issue 1-2, Pages 107-111Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2009.01.013
Keywords
Molecular dynamics simulations; Zeolites; Surface; Mass-transfer coefficient
Categories
Funding
- Deutsche Forschungsgemeinschaft [SPP 1155]
- Alexander-von-Humboldt Foundation (Germany)
Ask authors/readers for more resources
Analytical treatment of the problem of molecular transport through the external surface of zeolite crystals was applied to develop an expression for the mass-transfer coefficient of the external crystal surface (a) under the conditions of sorption equilibrium. The underlying model used in the derivation of this expression takes into account the possibility of strong adsorption of sorbate molecules on the external crystal surface. The new expression allows estimating the value of a if the following quantities are known: (i) the sorbate concentrations on both sides of the external crystal surface and, (ii) the probability for a sorbate molecule located on this surface to enter the zeolite lattice. The validity of the expression for a was confirmed by molecular dynamics simulations of the tracer exchange of methane molecules between the membrane of a silicious A-type zeolite and the surrounding gas phase. (C) 2009 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available