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A Transient Response Study of the Ammoxidation of Propene and Propane on an Sb-V-Oxide Catalyst

Nilsson, Roland and Andersson, Arne LU (1997) In Industrial & Engineering Chemistry Research 36(12). p.5207-5217
Abstract
The reaction pathways in the ammoxidation of propene and of propane over an Sb-V-oxide catalyst were studied by analyzing the modes of transient responses of reactants and products resulting from step changes from inert gas to reactant feed. The pathway from propane to acrylonitrile begins with the oxidative dehydrogenation of propane to form propene. After readsorption, the propene is then transformed into adsorbed acrolein, which eventually reacts with an NHx surface species to form acrylonitrile. The adsorption of propane is rate limiting for the propane conversion, but the desorption of water formed from the propene is slow and determines the product distribution. The response modes for the direct oxidation and ammoxidation of propene... (More)
The reaction pathways in the ammoxidation of propene and of propane over an Sb-V-oxide catalyst were studied by analyzing the modes of transient responses of reactants and products resulting from step changes from inert gas to reactant feed. The pathway from propane to acrylonitrile begins with the oxidative dehydrogenation of propane to form propene. After readsorption, the propene is then transformed into adsorbed acrolein, which eventually reacts with an NHx surface species to form acrylonitrile. The adsorption of propane is rate limiting for the propane conversion, but the desorption of water formed from the propene is slow and determines the product distribution. The response modes for the direct oxidation and ammoxidation of propene are consistent with the desorption of water being rate limiting. A comparison of the experimental responses viith responses simulated under the assumption that the formation of an allylic intermediate is rate determining reveals an important difference in profiles, indicating this step to not be rate determining. The results show that substantial qualitative information concerning the reaction pathways can be obtained from the analysis of transient profile modes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial & Engineering Chemistry Research
volume
36
issue
12
pages
5207 - 5217
publisher
The American Chemical Society
external identifiers
  • wos:A1997YJ88100022
  • scopus:0031364302
ISSN
0888-5885
DOI
10.1021/ie970226j
language
English
LU publication?
yes
id
ed8fdc74-a715-4ecb-9809-8ef401fe8442 (old id 35839)
date added to LUP
2007-06-15 15:52:13
date last changed
2017-10-22 04:40:11
@article{ed8fdc74-a715-4ecb-9809-8ef401fe8442,
  abstract     = {The reaction pathways in the ammoxidation of propene and of propane over an Sb-V-oxide catalyst were studied by analyzing the modes of transient responses of reactants and products resulting from step changes from inert gas to reactant feed. The pathway from propane to acrylonitrile begins with the oxidative dehydrogenation of propane to form propene. After readsorption, the propene is then transformed into adsorbed acrolein, which eventually reacts with an NHx surface species to form acrylonitrile. The adsorption of propane is rate limiting for the propane conversion, but the desorption of water formed from the propene is slow and determines the product distribution. The response modes for the direct oxidation and ammoxidation of propene are consistent with the desorption of water being rate limiting. A comparison of the experimental responses viith responses simulated under the assumption that the formation of an allylic intermediate is rate determining reveals an important difference in profiles, indicating this step to not be rate determining. The results show that substantial qualitative information concerning the reaction pathways can be obtained from the analysis of transient profile modes.},
  author       = {Nilsson, Roland and Andersson, Arne},
  issn         = {0888-5885},
  language     = {eng},
  number       = {12},
  pages        = {5207--5217},
  publisher    = {The American Chemical Society},
  series       = {Industrial & Engineering Chemistry Research},
  title        = {A Transient Response Study of the Ammoxidation of Propene and Propane on an Sb-V-Oxide Catalyst},
  url          = {http://dx.doi.org/10.1021/ie970226j},
  volume       = {36},
  year         = {1997},
}