Resistance to sulfur poisoning of hot gas cleaning catalysts for the removal of tar from the pyrolysis of cedar wood

Keiichi Tomishige, Tomohisa Miyazawa, Takeo Kimura, Kimio Kunimori, Naoto Koizumi, Muneyoshi Yamada

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

In the partial oxidation of tar derived from the pyrolysis of cedar wood, the effect of H2S addition was investigated over non-catalyst, steam reforming Ni catalyst, and Rh/CeO2/SiO2 using a fluidized bed reactor. In the non-catalytic gasification, the product distribution was not influenced by the presence of H2S. Steam reforming Ni catalyst was effective for the tar removal without H2S addition, however, the addition of H2S deactivated drastically. In contrast, Rh/CeO 2/SiO2 exhibited higher and more stable activity than the Ni catalyst even under the presence of high concentration of H2S (280 ppm). On the Ni catalyst, the adsorption of sulfur was observed by XPS and Ni species was oxidized during the partial oxidation of tar. In the case of Rh/CeO2/SiO2, the adsorption of sulfur was below the detection limit of XPS. This can be related to the self-cleaning of catalyst surface during the circulation in the fluidized bed reactor for the partial oxidation of tar derived from cedar pyrolysis.

Original languageEnglish
Pages (from-to)299-307
Number of pages9
JournalApplied Catalysis B: Environmental
Volume60
Issue number3-4
DOIs
Publication statusPublished - 2005 Oct 3
Externally publishedYes

Keywords

  • Biomass
  • Hot gas cleaning
  • Partial oxidation
  • Sulfur resistance
  • Tar

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Fingerprint Dive into the research topics of 'Resistance to sulfur poisoning of hot gas cleaning catalysts for the removal of tar from the pyrolysis of cedar wood'. Together they form a unique fingerprint.

  • Cite this