Ruthenium(IV) dioxide-catalyzed reductive gasification of intractable biomass including cellulose, heterocyclic compounds, and sludge in supercritical water

Tomoo Yamamura, Tomonori Mori, Ki Chul Park, Yasuhiko Fujii, Hiroshi Tomiyasu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Catalytic reduction gasification in the presence of ruthenium(IV) dioxide (RuO2) in supercritical water was used to decompose intractable biomass. The gasification of model biomass samples (glucose, cellulose, and heterocyclic compounds), and low-purity biomass samples obtained from a paper-recycling facility (paper sludge) and from a sewage treatment plant (sewage sludge) were studied. In clear contrast to another catalysts, the RuO2 catalyst completely gasified cellulose to produce mainly hydrogen, methane, and carbon dioxide under various conditions (e.g., 673 K at ∼30 MPa and 773 K at ∼50 MPa). As for heterocyclic compounds, nitrogen compounds did not deactivate the RuO2 catalyst; the gasification of carbazole proceeded completely. Furthermore, paper sludge was almost completely decomposed in supercritical water with RuO2 at 723 K.

Original languageEnglish
Pages (from-to)43-49
Number of pages7
JournalJournal of Supercritical Fluids
Volume51
Issue number1
DOIs
Publication statusPublished - 2009 Nov

Keywords

  • Cellulose
  • Heterocyclic compound
  • Paper sludge
  • RuO catalyst
  • Sewage sludge
  • Supercritical water

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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