Advanced

Deactivating effects of lead on the selective catalytic reduction of nitric oxide with ammonia over a V2O5/WO3/TiO2 catalyst for waste incineration applications

Khodayari, R and Odenbrand, Ingemar LU (1998) In Industrial & Engineering Chemistry Research 37(4). p.1196-1202
Abstract
Lead is one of the poisonous elements for de-NOx catalysts especially in the case of municipal waste incineration plants. Samples of a commercial selective catalytic reduction catalyst were impregnated with different amounts of Pb(NO3)(2), and their catalytic activities were studied. The XPS and SEM analysis showed higher lead concentration on the outer surface of the monolith than on the inside of the wall for all samples. Pb covers the surface of inactive TiO2 sites, likewise active V2O5/WO3 sites, in a thin, noncrystalline layer. Both activity and NH3 chemisorbed decreased in the same manner with increasing poison coverage. This suggests that the area available for reaction was the same or at least proportional to that for the... (More)
Lead is one of the poisonous elements for de-NOx catalysts especially in the case of municipal waste incineration plants. Samples of a commercial selective catalytic reduction catalyst were impregnated with different amounts of Pb(NO3)(2), and their catalytic activities were studied. The XPS and SEM analysis showed higher lead concentration on the outer surface of the monolith than on the inside of the wall for all samples. Pb covers the surface of inactive TiO2 sites, likewise active V2O5/WO3 sites, in a thin, noncrystalline layer. Both activity and NH3 chemisorbed decreased in the same manner with increasing poison coverage. This suggests that the area available for reaction was the same or at least proportional to that for the adsorption of NH3 and deactivation of the catalyst may be due to competitive chemisorption of the poison on the acid sites instead of by pore blocking. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial & Engineering Chemistry Research
volume
37
issue
4
pages
1196 - 1202
publisher
The American Chemical Society
external identifiers
  • wos:000073101700003
  • scopus:0032050607
ISSN
0888-5885
DOI
10.1021/ie9706065
language
English
LU publication?
yes
id
3b18d920-f359-4d62-a63c-8eb1ed89086c (old id 3916349)
date added to LUP
2013-07-02 14:17:45
date last changed
2017-01-01 07:27:03
@article{3b18d920-f359-4d62-a63c-8eb1ed89086c,
  abstract     = {Lead is one of the poisonous elements for de-NOx catalysts especially in the case of municipal waste incineration plants. Samples of a commercial selective catalytic reduction catalyst were impregnated with different amounts of Pb(NO3)(2), and their catalytic activities were studied. The XPS and SEM analysis showed higher lead concentration on the outer surface of the monolith than on the inside of the wall for all samples. Pb covers the surface of inactive TiO2 sites, likewise active V2O5/WO3 sites, in a thin, noncrystalline layer. Both activity and NH3 chemisorbed decreased in the same manner with increasing poison coverage. This suggests that the area available for reaction was the same or at least proportional to that for the adsorption of NH3 and deactivation of the catalyst may be due to competitive chemisorption of the poison on the acid sites instead of by pore blocking.},
  author       = {Khodayari, R and Odenbrand, Ingemar},
  issn         = {0888-5885},
  language     = {eng},
  number       = {4},
  pages        = {1196--1202},
  publisher    = {The American Chemical Society},
  series       = {Industrial & Engineering Chemistry Research},
  title        = {Deactivating effects of lead on the selective catalytic reduction of nitric oxide with ammonia over a V2O5/WO3/TiO2 catalyst for waste incineration applications},
  url          = {http://dx.doi.org/10.1021/ie9706065},
  volume       = {37},
  year         = {1998},
}