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Effect of fly ash and H2S on a Ni-based catalyst for the upgrading of a biomass-generated gas

Albertazzi, Simone; Basile, Franceso; Brandin, Jan LU ; Einvall, Jessica; Fornasari, G; Hulteberg, Christian LU ; Sanati, Mehri LU ; Trifiro, Ferrucci and Vaccari, A (2008) In Biomass & Bioenergy 32(4). p.345-353
Abstract
The main concern about the technology for the production of hydrogen and transport fuels by biomass gasification is the presence of contaminants (H2S, tars, fly ash, alkali, and heavy metals, ammonia) that are poisonous for the catalysts used for upgrading the biomass-generated gas. The impact of the main contaminants on a Ni/MgAl(O) reforming catalyst was studied in a laboratory environment, by exposing the studied sample to H2S, NH3, K2SO4, KCl, ZnCl2, and a solution derived from biomass fly ash. Lastly, the catalyst was also streamed with a gas produced by a bench-scale downdraft gasifier. The extent of deactivation was examined in the methane steam reforming reaction, under different operational conditions. The main effect of the... (More)
The main concern about the technology for the production of hydrogen and transport fuels by biomass gasification is the presence of contaminants (H2S, tars, fly ash, alkali, and heavy metals, ammonia) that are poisonous for the catalysts used for upgrading the biomass-generated gas. The impact of the main contaminants on a Ni/MgAl(O) reforming catalyst was studied in a laboratory environment, by exposing the studied sample to H2S, NH3, K2SO4, KCl, ZnCl2, and a solution derived from biomass fly ash. Lastly, the catalyst was also streamed with a gas produced by a bench-scale downdraft gasifier. The extent of deactivation was examined in the methane steam reforming reaction, under different operational conditions. The main effect of the treatments was a decrease in the bulk surface area and in the metal dispersion. Streaming H2S quickly deactivated the catalyst; however, the activity was recovered by increasing the inlet temperature or by adding O2 to the stream. In further laboratory tests, the performances of the catalyst seemed not to be greatly affected by either the above treatments or by the presence of ammonia in the fed water. The catalyst produced a syngas composition close to that predicted at equilibrium even after being streamed with the biomass-generated gas. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biomass gasification, Fly ash, Methane steam reforming, Synthesis gas, Ni catalyst, H2S
in
Biomass & Bioenergy
volume
32
issue
4
pages
345 - 353
publisher
Elsevier
external identifiers
  • wos:000255473600009
  • scopus:41249093053
ISSN
1873-2909
DOI
10.1016/j.biombioe.2007.10.002
language
English
LU publication?
no
id
9bcf8139-5c87-446b-ab72-91de22adc808 (old id 1270964)
date added to LUP
2008-12-01 10:51:34
date last changed
2017-07-30 03:42:17
@article{9bcf8139-5c87-446b-ab72-91de22adc808,
  abstract     = {The main concern about the technology for the production of hydrogen and transport fuels by biomass gasification is the presence of contaminants (H2S, tars, fly ash, alkali, and heavy metals, ammonia) that are poisonous for the catalysts used for upgrading the biomass-generated gas. The impact of the main contaminants on a Ni/MgAl(O) reforming catalyst was studied in a laboratory environment, by exposing the studied sample to H2S, NH3, K2SO4, KCl, ZnCl2, and a solution derived from biomass fly ash. Lastly, the catalyst was also streamed with a gas produced by a bench-scale downdraft gasifier. The extent of deactivation was examined in the methane steam reforming reaction, under different operational conditions. The main effect of the treatments was a decrease in the bulk surface area and in the metal dispersion. Streaming H2S quickly deactivated the catalyst; however, the activity was recovered by increasing the inlet temperature or by adding O2 to the stream. In further laboratory tests, the performances of the catalyst seemed not to be greatly affected by either the above treatments or by the presence of ammonia in the fed water. The catalyst produced a syngas composition close to that predicted at equilibrium even after being streamed with the biomass-generated gas.},
  author       = {Albertazzi, Simone and Basile, Franceso and Brandin, Jan and Einvall, Jessica and Fornasari, G and Hulteberg, Christian and Sanati, Mehri and Trifiro, Ferrucci and Vaccari, A},
  issn         = {1873-2909},
  keyword      = {Biomass gasification,Fly ash,Methane steam reforming,Synthesis gas,Ni catalyst,H2S},
  language     = {eng},
  number       = {4},
  pages        = {345--353},
  publisher    = {Elsevier},
  series       = {Biomass & Bioenergy},
  title        = {Effect of fly ash and H2S on a Ni-based catalyst for the upgrading of a biomass-generated gas},
  url          = {http://dx.doi.org/10.1016/j.biombioe.2007.10.002},
  volume       = {32},
  year         = {2008},
}