Zeolite adsorption site location and shape shown by simulated isodensity surfaces

Paul R. Van Tassel; James C. Phillips; H. Ted Davis; Alon V. McCormick

doi:10.1016/0263-7855(93)80070-8

Zeolite adsorption site location and shape shown by simulated isodensity surfaces

Paul R. Van Tassel, James C. Phillips, H. Ted Davis, Alon V. McCormick

Research output: Contribution to journal › Article › peer-review

Abstract

The graphics software package Ribbons¹ 1 Carson, M. Ribbons models of macromolecules. J. Molec. Graphics 1987, 5, 103-109. is used to display isodensity surfaces of Xe atoms adsorbed in the alpha cage of zeolite NaA. The location, size, and shape of the adsorption sites are highly dependent on the loading and the crystal cation content. When the zeolite has a high number of cations, ellipsoidal sites arrange in a cuboctahedron. When the zeolite has fewer cations, cone-shaped sites arrange in an octahedron at low loading, but at high loading the sites become ellipsoidal and new sites form at cuboctahedral positions. The effect of the nature of the adsorption site on the development of a universal adsorption model is discussed.

Original language	English (US)
Pages (from-to)	180-184
Number of pages	5
Journal	Journal of Molecular Graphics
Volume	11
Issue number	3
DOIs	https://doi.org/10.1016/0263-7855(93)80070-8
State	Published - Sep 1993
Externally published	Yes

Keywords

Monte Carlo
NaA
Xe
adsorption
isosurface
molecular simulation
zeolite

ASJC Scopus subject areas

Biophysics
Biochemistry

Online availability

10.1016/0263-7855(93)80070-8

Library availability

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title = "Zeolite adsorption site location and shape shown by simulated isodensity surfaces",

abstract = "The graphics software package Ribbons1 1 Carson, M. Ribbons models of macromolecules. J. Molec. Graphics 1987, 5, 103-109. is used to display isodensity surfaces of Xe atoms adsorbed in the alpha cage of zeolite NaA. The location, size, and shape of the adsorption sites are highly dependent on the loading and the crystal cation content. When the zeolite has a high number of cations, ellipsoidal sites arrange in a cuboctahedron. When the zeolite has fewer cations, cone-shaped sites arrange in an octahedron at low loading, but at high loading the sites become ellipsoidal and new sites form at cuboctahedral positions. The effect of the nature of the adsorption site on the development of a universal adsorption model is discussed.",

keywords = "Monte Carlo, NaA, Xe, adsorption, isosurface, molecular simulation, zeolite",

author = "{Van Tassel}, {Paul R.} and Phillips, {James C.} and Davis, {H. Ted} and McCormick, {Alon V.}",

note = "Funding Information: The authors wish to thank the Minnesota Supercomputer Institute (MSI) for accesst o the Cray X-MP supercomputer and the Silicon Graphic{\textquoteright}s Iris4D workstations, P. Van Valkenberg for acquiring Ribbons for use at MSI, M.V. Hughes for graphical support, and the entire MS1 staff for their technical support. This work was partially supported by the ACS Petroleum ResearchF und, the National Science Foundation, MSI, and the University of Minnesota Graduate School Doctoral Dissertation Fellowship Program. The authors of the isosurface generation methodsI have requested that thef ollowing message be included in all derived work: Portions developed at the National Center for Su-percomputingA pplications at the University of Illinois at Urbana-Champaign.",

year = "1993",

month = sep,

doi = "10.1016/0263-7855(93)80070-8",

language = "English (US)",

volume = "11",

pages = "180--184",

journal = "Journal of Molecular Graphics",

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AU - Van Tassel, Paul R.

AU - Phillips, James C.

AU - Davis, H. Ted

AU - McCormick, Alon V.

N1 - Funding Information: The authors wish to thank the Minnesota Supercomputer Institute (MSI) for accesst o the Cray X-MP supercomputer and the Silicon Graphic’s Iris4D workstations, P. Van Valkenberg for acquiring Ribbons for use at MSI, M.V. Hughes for graphical support, and the entire MS1 staff for their technical support. This work was partially supported by the ACS Petroleum ResearchF und, the National Science Foundation, MSI, and the University of Minnesota Graduate School Doctoral Dissertation Fellowship Program. The authors of the isosurface generation methodsI have requested that thef ollowing message be included in all derived work: Portions developed at the National Center for Su-percomputingA pplications at the University of Illinois at Urbana-Champaign.

PY - 1993/9

Y1 - 1993/9

N2 - The graphics software package Ribbons1 1 Carson, M. Ribbons models of macromolecules. J. Molec. Graphics 1987, 5, 103-109. is used to display isodensity surfaces of Xe atoms adsorbed in the alpha cage of zeolite NaA. The location, size, and shape of the adsorption sites are highly dependent on the loading and the crystal cation content. When the zeolite has a high number of cations, ellipsoidal sites arrange in a cuboctahedron. When the zeolite has fewer cations, cone-shaped sites arrange in an octahedron at low loading, but at high loading the sites become ellipsoidal and new sites form at cuboctahedral positions. The effect of the nature of the adsorption site on the development of a universal adsorption model is discussed.

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KW - Monte Carlo

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KW - adsorption

KW - isosurface

KW - molecular simulation

KW - zeolite

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Zeolite adsorption site location and shape shown by simulated isodensity surfaces

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