In-situ visualization of heavy oil behavior in supercritical water using neutron radiography

Eita Shoji, Takahiro Kikuchi, Koshiro Yamagiwa, Masaki Kubo, Takao Tsukada, Seiichi Takami, Katsumi Sugimoto, Daisuke Ito, Yasushi Saito

Research output: Contribution to journalArticlepeer-review

Abstract

Supercritical water upgrading of heavy oil has attracted considerable attention, as the upgrading process can reduce the sulfur content and decrease the average molecular weight of the oil. Understanding the flow and mixing behavior of heavy oil in supercritical water is important to improve the process efficiency. We performed neutron radiography experiments to directly visualize the behavior of heavy oil in supercritical water. Atmospheric residue was used as a heavy oil sample, and the heavy oil and supercritical water were supplied countercurrently to a 1/2-inch tube reactor packed with Al2O3 particles with a diameter of 3 mm; the pressure and temperature were set to 25 MPa and 400°C. The behavior of the heavy oil in the supercritical water depended on the oil and water flow rates. This study demonstrates that neutron radiography is a feasible visualization technique for the investigation of heavy oil behavior in supercritical water.

Original languageEnglish
Article number115816
JournalChemical Engineering Science
Volume225
DOIs
Publication statusPublished - 2020 Nov 2

Keywords

  • Flow visualization
  • Heavy oil
  • Neutron radiography
  • Supercritical water

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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