Upgrading of asphalt with and without partial oxidation in supercritical water

Takafumi Sato, Tadafumi Adschiri, Kunio Arai, Garry L. Rempel, Flora T.T. Ng

Research output: Contribution to journalArticlepeer-review

132 Citations (Scopus)


Supercritical water and supercritical water partial oxidation treatments were applied to the upgrading of asphalt. Asphalt was converted at 613-673 K, 0-0.5 g/cm3 water density under argon or air atmosphere. Under an argon atmosphere and 0.5 g/cm3 water density, both the asphaltene conversion and desulfurization increased with increasing temperature. At 673 K, the asphaltene conversion and the yield of CO2 increased with an increasing water density. Water apparently participated in the reaction and its hydrogen was used for capping the free radicals generated during the upgrading of asphalt resulting in an increased yield of maltene. Under an air atmosphere at 673 K, asphaltene conversion was lower but desulfurization was higher than those obtained in an argon atmosphere.

Original languageEnglish
Pages (from-to)1231-1239
Number of pages9
Issue number10
Publication statusPublished - 2003 Jul


  • Asphalt
  • Asphaltene
  • Desulfurization
  • Partial oxidation
  • Steam reforming
  • Supercritical water
  • Upgrading

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


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