On the Loewenstein Rule and Mechanism of Zeolite Dealumination Full article
Journal |
Journal of Physical Chemistry (up to 1996)
ISSN: 0022-3654 |
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Output data | Year: 1992, Volume: 96, Number: 17, Pages: 7051-7055 Pages count : 5 DOI: 10.1021/j100196a039 | ||
Tags | FAUJASITE-TYPE ZEOLITES; ALUMINUM SITE REACTIVITY; SYNTHETIC FAUJASITES; ACID STRENGTH; Y ZEOLITES; FRAMEWORK; SILICON; LATTICE; DEFICIENT; NMR | ||
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Abstract:
The reason for and the peculiarities of dealumination of aluminum-rich zeolites are explained on the basis of ab initio AH MO calculations of the energies of local chemical interactions in the zeolite lattice. As distinct from Dempsey-Mikovsky-Marshall electrostatic approach (DMM), a conclusion is made that simultaneous extraction of the most closely situated structural elements from the lattice takes place. The first step of this reaction is their mutual extracoordination according to the scheme. This step and the subsequent formation of large nuclei of hydroxoaluminum phases are regarded as a transformation of the lattice into a most energetically favorable state corresponding to the chemical composition nSiO2.mAl2O3.kH2O.
Cite:
Pelmenschikov A.G.
, Paukshtis E.A.
, Edisherashvili M.O.
, Zhidomirov G.M.
On the Loewenstein Rule and Mechanism of Zeolite Dealumination
Journal of Physical Chemistry (up to 1996). 1992. V.96. N17. P.7051-7055. DOI: 10.1021/j100196a039 WOS Scopus РИНЦ
On the Loewenstein Rule and Mechanism of Zeolite Dealumination
Journal of Physical Chemistry (up to 1996). 1992. V.96. N17. P.7051-7055. DOI: 10.1021/j100196a039 WOS Scopus РИНЦ
Dates:
Submitted: | Jul 31, 1990 |
Accepted: | Apr 21, 1992 |
Published print: | Aug 20, 1992 |
Published online: | May 1, 2002 |
Identifiers:
Web of science | WOS:A1992JK80700039 |
Scopus | 2-s2.0-0001448934 |
Elibrary | 26577865 |
Chemical Abstracts | 1992:498477 |
Chemical Abstracts (print) | 117:98477 |
OpenAlex | W1964359347 |