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Structure-Activity Relationships in the Oxidation of Alkylaromatics over Metal Oxides

Andersson, Arne LU ; Hansen, Staffan LU and Sanati, Mehri LU (1991) In Studies in Surface Science and Catalysis 67. p.43-55
Abstract
In order to accomplish oxidation of alkylaromatic compounds, both cations, which serve as adsorption centers, and oxygen species of suitable bond strength are needed. When compared to partial oxidation, relatively weakly bonded oxygen species are involved in combustion. On the basis of these criteria, using a simple model of the active ensemble, a relationship between reaction rate and bond strength is derived for partial and total oxidation. Its applicability is demonstrated using data for the oxidation of toluene over a large number of binary metal oxides. Some characteristic features following from the model are discussed, considering catalytic results on the structure sensitivity of oxidation and ammoxidation reactions over crystalline... (More)
In order to accomplish oxidation of alkylaromatic compounds, both cations, which serve as adsorption centers, and oxygen species of suitable bond strength are needed. When compared to partial oxidation, relatively weakly bonded oxygen species are involved in combustion. On the basis of these criteria, using a simple model of the active ensemble, a relationship between reaction rate and bond strength is derived for partial and total oxidation. Its applicability is demonstrated using data for the oxidation of toluene over a large number of binary metal oxides. Some characteristic features following from the model are discussed, considering catalytic results on the structure sensitivity of oxidation and ammoxidation reactions over crystalline V,O and MOO,. Furthermore, kinetic results on the oxidation of toluene to benzaldehyde and carbon oxides in presence of ammonia, which serves as an electron donor to the catalyst surface, demonstrate that the oxygen species taking part in partial oxidation and combustion are nucleophilic and electrophilic in character, respectively. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Studies in Surface Science and Catalysis
volume
67
pages
43 - 55
publisher
Elsevier
external identifiers
  • Scopus:0041870618
ISSN
0167-2991
DOI
10.1016/S0167-2991(08)61925-4
language
English
LU publication?
yes
id
2d21735f-acd1-48a0-8b74-303f75748c63 (old id 2005794)
date added to LUP
2011-06-30 13:59:19
date last changed
2017-01-01 07:55:48
@article{2d21735f-acd1-48a0-8b74-303f75748c63,
  abstract     = {In order to accomplish oxidation of alkylaromatic compounds, both cations, which serve as adsorption centers, and oxygen species of suitable bond strength are needed. When compared to partial oxidation, relatively weakly bonded oxygen species are involved in combustion. On the basis of these criteria, using a simple model of the active ensemble, a relationship between reaction rate and bond strength is derived for partial and total oxidation. Its applicability is demonstrated using data for the oxidation of toluene over a large number of binary metal oxides. Some characteristic features following from the model are discussed, considering catalytic results on the structure sensitivity of oxidation and ammoxidation reactions over crystalline V,O and MOO,. Furthermore, kinetic results on the oxidation of toluene to benzaldehyde and carbon oxides in presence of ammonia, which serves as an electron donor to the catalyst surface, demonstrate that the oxygen species taking part in partial oxidation and combustion are nucleophilic and electrophilic in character, respectively.},
  author       = {Andersson, Arne and Hansen, Staffan and Sanati, Mehri},
  issn         = {0167-2991},
  language     = {eng},
  pages        = {43--55},
  publisher    = {Elsevier},
  series       = {Studies in Surface Science and Catalysis},
  title        = {Structure-Activity Relationships in the Oxidation of Alkylaromatics over Metal Oxides},
  url          = {http://dx.doi.org/10.1016/S0167-2991(08)61925-4},
  volume       = {67},
  year         = {1991},
}