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Kinetics of ammonia decomposition in hot gas cleaning

Wang, Wuyin LU ; Padban, N; Ye, ZC; Andersson, Arne LU and Bjerle, Ingemar LU (1999) In Industrial & Engineering Chemistry Research 38(11). p.4175-4182
Abstract
Reduction in the amount of ammonia in fuel gas from biomass gasification was studied. Experiments were carried out in a fixed-bed reactor dt 200-1000 degrees C, 21 atm. A kinetic model for ammonia decomposition was developed. The partial pressure of hydrogen in the fuel gas was a key factor to model ammonia decomposition. Activation energies in the empty reactor, on carbon, and in a sand bed were similar, 130-140 kJ/mol. The frequency factors for carbon and sand were 10 times as large as for the empty reactor. The activation energy for a Ni-based catalyst was 111-113 kJ/mol. Carbon deposit deactivated the Ni-based catalyst. High temperature was found to be essential for avoiding carbon fouling and for achieving high ammonia removal... (More)
Reduction in the amount of ammonia in fuel gas from biomass gasification was studied. Experiments were carried out in a fixed-bed reactor dt 200-1000 degrees C, 21 atm. A kinetic model for ammonia decomposition was developed. The partial pressure of hydrogen in the fuel gas was a key factor to model ammonia decomposition. Activation energies in the empty reactor, on carbon, and in a sand bed were similar, 130-140 kJ/mol. The frequency factors for carbon and sand were 10 times as large as for the empty reactor. The activation energy for a Ni-based catalyst was 111-113 kJ/mol. Carbon deposit deactivated the Ni-based catalyst. High temperature was found to be essential for avoiding carbon fouling and for achieving high ammonia removal efficiency. Estimation of the ammonia reduction for fuel gas showed that a moderate amount of ammonia could be removed by use of the Ni-based pellets at 800 degrees C. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial & Engineering Chemistry Research
volume
38
issue
11
pages
4175 - 4182
publisher
The American Chemical Society
external identifiers
  • wos:000083533700006
  • scopus:0033231182
ISSN
0888-5885
DOI
10.1021/ie990337d
language
English
LU publication?
yes
id
14fe860e-3335-4fdb-838d-330bb29b6e7d (old id 3915464)
date added to LUP
2013-07-02 08:42:23
date last changed
2017-06-25 04:26:12
@article{14fe860e-3335-4fdb-838d-330bb29b6e7d,
  abstract     = {Reduction in the amount of ammonia in fuel gas from biomass gasification was studied. Experiments were carried out in a fixed-bed reactor dt 200-1000 degrees C, 21 atm. A kinetic model for ammonia decomposition was developed. The partial pressure of hydrogen in the fuel gas was a key factor to model ammonia decomposition. Activation energies in the empty reactor, on carbon, and in a sand bed were similar, 130-140 kJ/mol. The frequency factors for carbon and sand were 10 times as large as for the empty reactor. The activation energy for a Ni-based catalyst was 111-113 kJ/mol. Carbon deposit deactivated the Ni-based catalyst. High temperature was found to be essential for avoiding carbon fouling and for achieving high ammonia removal efficiency. Estimation of the ammonia reduction for fuel gas showed that a moderate amount of ammonia could be removed by use of the Ni-based pellets at 800 degrees C.},
  author       = {Wang, Wuyin and Padban, N and Ye, ZC and Andersson, Arne and Bjerle, Ingemar},
  issn         = {0888-5885},
  language     = {eng},
  number       = {11},
  pages        = {4175--4182},
  publisher    = {The American Chemical Society},
  series       = {Industrial & Engineering Chemistry Research},
  title        = {Kinetics of ammonia decomposition in hot gas cleaning},
  url          = {http://dx.doi.org/10.1021/ie990337d},
  volume       = {38},
  year         = {1999},
}