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Regeneration of commercial TiO2-V2O5-WO3SCR catalysts used in bio fuel plants

Khodayari, R and Odenbrand, Ingemar LU (2001) In Applied Catalysis B: Environmental 30(1-2). p.87-99
Abstract
Deactivation of SCR catalysts applied in bio fuel plants is a major problem due to higher amounts of potassium in bio fuel compared to other fuels. Regeneration of deactivated catalysts seems to be a promising way for minimising the total cost of bio fuel plants and great potential lies in finding regeneration processes that can be used commercially. The first applied regeneration method was washing of two different commercially aged catalysts in different aqueous solutions. The other method was washing with water followed by sulphation at different temperatures. Sulphation with SO2 resulted in higher activation without affecting the amount of potassium accumulated on the surface indicating the role of surface sulphate groups. Since... (More)
Deactivation of SCR catalysts applied in bio fuel plants is a major problem due to higher amounts of potassium in bio fuel compared to other fuels. Regeneration of deactivated catalysts seems to be a promising way for minimising the total cost of bio fuel plants and great potential lies in finding regeneration processes that can be used commercially. The first applied regeneration method was washing of two different commercially aged catalysts in different aqueous solutions. The other method was washing with water followed by sulphation at different temperatures. Sulphation with SO2 resulted in higher activation without affecting the amount of potassium accumulated on the surface indicating the role of surface sulphate groups. Since potassium both decreases the catalytic activity for NO-reduction and retards the redox potential of the surface vanadium species during the sulphation procedure, it is necessary to wash the heavily deactivated catalyst before sulphation. Washing with water or diluted sulphuric acid could not restore the vanadium groups to the initial condition. Washing with 0.5 M H2SO4 was the most effective regeneration method and the bio-modified catalyst regained 92% of its initial activity, while the corresponding value for the conventional catalyst was 111%. (C) 2001 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SCR, TiO2-V2O5-WO3, bio fuel, deactivation, regeneration, sulphation
in
Applied Catalysis B: Environmental
volume
30
issue
1-2
pages
87 - 99
publisher
Elsevier
external identifiers
  • wos:000167204800008
  • scopus:0035952243
ISSN
0926-3373
DOI
10.1016/S0926-3373(00)00227-7
language
English
LU publication?
yes
id
3e6ff8f1-bc87-476a-b522-737f809c6105 (old id 3916295)
date added to LUP
2013-07-02 13:28:38
date last changed
2018-10-03 12:05:34
@article{3e6ff8f1-bc87-476a-b522-737f809c6105,
  abstract     = {Deactivation of SCR catalysts applied in bio fuel plants is a major problem due to higher amounts of potassium in bio fuel compared to other fuels. Regeneration of deactivated catalysts seems to be a promising way for minimising the total cost of bio fuel plants and great potential lies in finding regeneration processes that can be used commercially. The first applied regeneration method was washing of two different commercially aged catalysts in different aqueous solutions. The other method was washing with water followed by sulphation at different temperatures. Sulphation with SO2 resulted in higher activation without affecting the amount of potassium accumulated on the surface indicating the role of surface sulphate groups. Since potassium both decreases the catalytic activity for NO-reduction and retards the redox potential of the surface vanadium species during the sulphation procedure, it is necessary to wash the heavily deactivated catalyst before sulphation. Washing with water or diluted sulphuric acid could not restore the vanadium groups to the initial condition. Washing with 0.5 M H2SO4 was the most effective regeneration method and the bio-modified catalyst regained 92% of its initial activity, while the corresponding value for the conventional catalyst was 111%. (C) 2001 Elsevier Science B.V. All rights reserved.},
  author       = {Khodayari, R and Odenbrand, Ingemar},
  issn         = {0926-3373},
  keyword      = {SCR,TiO2-V2O5-WO3,bio fuel,deactivation,regeneration,sulphation},
  language     = {eng},
  number       = {1-2},
  pages        = {87--99},
  publisher    = {Elsevier},
  series       = {Applied Catalysis B: Environmental},
  title        = {Regeneration of commercial TiO2-V2O5-WO3SCR catalysts used in bio fuel plants},
  url          = {http://dx.doi.org/10.1016/S0926-3373(00)00227-7},
  volume       = {30},
  year         = {2001},
}