Topics in Catalysis

, Volume 52, Issue 8, pp 1070–1078 | Cite as

The Effect of Sulfur on ZrO2-Based Biomass Gasification Gas Clean-Up Catalysts

  • Hanne Rönkkönen
  • Pekka Simell
  • Matti Reinikainen
  • Outi Krause
Original Paper

Abstract

The effect of sulfur on biomass gasification gas clean-up over ZrO2, Y2O3–ZrO2 and SiO2–ZrO2 catalysts was examined. Experiments were carried out at the temperature range of 600–900 °C with sulfur free and 100 ppm H2S containing simulated gasification gas feeds. A mixture of toluene and naphthalene was used as a tar model compound. Results revealed that the sulfur addition affected positively on the catalyst properties mainly at 600 and 700 °C: over Y2O3–ZrO2 and ZrO2 sulfur addition improved naphthalene and ammonia conversion. However, over SiO2–ZrO2 no clear effect with H2S addition was observed. The effect of sulfur addition on the catalyst properties was connected to the formation of SO2 from H2S when oxygen was available. The intensity of the sulfur effect increased with the Lewis basicity strength of the catalysts. This indicates that the sulfur adsorption has a role in generating new type of active sites and/or plays role in changing the redox properties of the zirconia. Since the biomass gasification gas contains usually significant amounts of H2S the sulfur tolerance of the zirconia based catalysts is a remarkable benefit.

Keywords

Zirconia catalyst Gasification Gas clean-up Sulfur tolerance 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Hanne Rönkkönen
    • 1
  • Pekka Simell
    • 2
  • Matti Reinikainen
    • 2
  • Outi Krause
    • 1
  1. 1.Department of Biotechnology and Chemical TechnologyHelsinki University of Technology EspooFinland
  2. 2.Technical Research Centre of Finland (VTT) EspooFinland

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