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Catalytic hot gas cleaning of fuel gas from an air-blown pressurized fluidized-bed gasifier

Wang, Wuyin LU ; Padban, N; Ye, ZC; Olofsson, G; Andersson, Arne LU and Bjerle, Ingemar LU (2000) In Industrial & Engineering Chemistry Research 39(11). p.4075-4081
Abstract
Catalytic ammonia decomposition and tar reduction by a Ni catalyst were studied using a feed gas from a pilot-scale pressurized fluidized-bed gasifier. Tests were conducted in a tubular fixed-bed reactor with a space time of about 3 s at 800-900 degreesC and 12 atm. Ammonia removals of 35-95% and light tar conversions of 90-95% were observed. The amount of the light hydrocarbons was found to have a negative effect on the ammonia decomposition. An ammonia concentration in the fuel gas, gas residence time, and catalytic bed temperature also had a significant influence on the ammonia removal efficiency. After the catalyst, CO2 and CO approached equilibrium values,but the content of H-2 and H2O was lower because of reactions with tar. The... (More)
Catalytic ammonia decomposition and tar reduction by a Ni catalyst were studied using a feed gas from a pilot-scale pressurized fluidized-bed gasifier. Tests were conducted in a tubular fixed-bed reactor with a space time of about 3 s at 800-900 degreesC and 12 atm. Ammonia removals of 35-95% and light tar conversions of 90-95% were observed. The amount of the light hydrocarbons was found to have a negative effect on the ammonia decomposition. An ammonia concentration in the fuel gas, gas residence time, and catalytic bed temperature also had a significant influence on the ammonia removal efficiency. After the catalyst, CO2 and CO approached equilibrium values,but the content of H-2 and H2O was lower because of reactions with tar. The heating value of the fuel gas remained the same; The gasification efficiency increased by about 10%, mainly because of catalytic tar cracking. Deactivation of the catalyst was not observed in the fuel gas containing 50-150 ppm H2S and about 10 g/Nm(3) tar. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial & Engineering Chemistry Research
volume
39
issue
11
pages
4075 - 4081
publisher
The American Chemical Society
external identifiers
  • wos:000165191400013
  • scopus:0034325239
ISSN
0888-5885
DOI
10.1021/ie000275n
language
English
LU publication?
yes
id
5b03af97-8b69-4ac6-8802-d50aa5fe43bc (old id 3915442)
date added to LUP
2013-07-02 08:47:11
date last changed
2017-07-30 04:28:00
@article{5b03af97-8b69-4ac6-8802-d50aa5fe43bc,
  abstract     = {Catalytic ammonia decomposition and tar reduction by a Ni catalyst were studied using a feed gas from a pilot-scale pressurized fluidized-bed gasifier. Tests were conducted in a tubular fixed-bed reactor with a space time of about 3 s at 800-900 degreesC and 12 atm. Ammonia removals of 35-95% and light tar conversions of 90-95% were observed. The amount of the light hydrocarbons was found to have a negative effect on the ammonia decomposition. An ammonia concentration in the fuel gas, gas residence time, and catalytic bed temperature also had a significant influence on the ammonia removal efficiency. After the catalyst, CO2 and CO approached equilibrium values,but the content of H-2 and H2O was lower because of reactions with tar. The heating value of the fuel gas remained the same; The gasification efficiency increased by about 10%, mainly because of catalytic tar cracking. Deactivation of the catalyst was not observed in the fuel gas containing 50-150 ppm H2S and about 10 g/Nm(3) tar.},
  author       = {Wang, Wuyin and Padban, N and Ye, ZC and Olofsson, G and Andersson, Arne and Bjerle, Ingemar},
  issn         = {0888-5885},
  language     = {eng},
  number       = {11},
  pages        = {4075--4081},
  publisher    = {The American Chemical Society},
  series       = {Industrial & Engineering Chemistry Research},
  title        = {Catalytic hot gas cleaning of fuel gas from an air-blown pressurized fluidized-bed gasifier},
  url          = {http://dx.doi.org/10.1021/ie000275n},
  volume       = {39},
  year         = {2000},
}