Hydrogenation through Partial Oxidation of Hydrocarbons in Supercritical Water

Tadafumi Adschiri, Susumu Okazaki, Makoto Mochiduki, Shutaro Kurosawa, Kunio Arai

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Catalytic hydrogenation of naphthalene and dibenzothiophene through a water gas shift reaction (CO+H2→CO2+H2) in supercritical water (SCW) is studied. Experiments were conducted with NiMo/Al2O3 at 673 K and 30-32 MPa, in various atmospheres (H2-SCW, CO-SCW, CO2-H2-SCW etc.), by using a tube bomb reactor. The results show that higher conversion of naphthalene was obtained in CO-SCW and in CO2-H2-SCW than in H2-SCW. These results cleary indicate that the water-gas shift reaction in SCW produces species which have higher hydrogenationg reactivity than H2 gas in SCW. Partial oxidation of hexylbenzene and n-hexadecane in SCW were also studied. At low water density (0-0.16g/cm3), CO2 Was the main product. However, with increasing water density (up to 0.52g/cm3), the CO2 ratio tended to decrease while the CO and H2 ratios increased.

Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalInternational Journal of the Society of Materials Engineering for Resources
Volume7
Issue number2
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Catalyst
  • Dibenzothiophene
  • Hydrogenation
  • Naphthalene
  • Partial Oxidation
  • Supercritical water
  • Water Gas Shift Reaction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Mechanical Engineering

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