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Title: Sorption of benzene on AlPO{sub 4}-5 containing various heteroatoms and analytical description of the system

Abstract

Sorption of benzene on nonsubstituted AlPO{sub 4}-5 occurs on adsorption centers originating from surface heterogeneity and created by structure defects. The metallic heteroatoms present in the framework of substituted AFI-type materials form additional centers able to bind the benzene molecules. This is equal to an increase of heterogeneity in comparison to nonsubstituted AlPO{sub 4}-5. Sorption capacity of the MeAPO-5 materials depends on both the content of metal and its distribution throughout the crystals. The distribution parameter plays an important role and may even dominate the effect of the number of metallic heterocenters. Some of the equations based on the Polanyi-Dubinin potential theory can be accepted as suitable for characterizing the distribution of the adsorption potential and adsorption energy of the AFI-type molecular sieves. The dependence between the adsorption potential and the metal content may likely be disturbed by inhomogeneous distribution of the heteroatom centers.

Authors:
; ; ;
Publication Date:
Research Org.:
Nicholas Copernicus Univ., Torun (PL)
OSTI Identifier:
20000523
Report Number(s):
CONF-9808111-
Journal ID: ISSN 0743-7463; LANGD5
Resource Type:
Journal Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 15; Journal Issue: 18; Conference: Third international symposium on effects of surface heterogeneity in adsorption and catalysis on solids, Torun (PL), 08/09/1998--08/16/1998; Other Information: PBD: 31 Aug 1999; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; BENZENE; ADSORPTION; ALUMINIUM PHOSPHATES; SORPTIVE PROPERTIES; CRYSTAL DEFECTS; MOLECULAR SIEVES

Citation Formats

Rozwadowski, M., Kornatowski, J., Golembiewski, R., and Erdmann, K. Sorption of benzene on AlPO{sub 4}-5 containing various heteroatoms and analytical description of the system. United States: N. p., 1999. Web. doi:10.1021/la981422d.
Rozwadowski, M., Kornatowski, J., Golembiewski, R., & Erdmann, K. Sorption of benzene on AlPO{sub 4}-5 containing various heteroatoms and analytical description of the system. United States. doi:10.1021/la981422d.
Rozwadowski, M., Kornatowski, J., Golembiewski, R., and Erdmann, K. Tue . "Sorption of benzene on AlPO{sub 4}-5 containing various heteroatoms and analytical description of the system". United States. doi:10.1021/la981422d.
@article{osti_20000523,
title = {Sorption of benzene on AlPO{sub 4}-5 containing various heteroatoms and analytical description of the system},
author = {Rozwadowski, M. and Kornatowski, J. and Golembiewski, R. and Erdmann, K.},
abstractNote = {Sorption of benzene on nonsubstituted AlPO{sub 4}-5 occurs on adsorption centers originating from surface heterogeneity and created by structure defects. The metallic heteroatoms present in the framework of substituted AFI-type materials form additional centers able to bind the benzene molecules. This is equal to an increase of heterogeneity in comparison to nonsubstituted AlPO{sub 4}-5. Sorption capacity of the MeAPO-5 materials depends on both the content of metal and its distribution throughout the crystals. The distribution parameter plays an important role and may even dominate the effect of the number of metallic heterocenters. Some of the equations based on the Polanyi-Dubinin potential theory can be accepted as suitable for characterizing the distribution of the adsorption potential and adsorption energy of the AFI-type molecular sieves. The dependence between the adsorption potential and the metal content may likely be disturbed by inhomogeneous distribution of the heteroatom centers.},
doi = {10.1021/la981422d},
journal = {Langmuir},
issn = {0743-7463},
number = 18,
volume = 15,
place = {United States},
year = {1999},
month = {8}
}