Catalytic upgrading of heavy oil using NiCo/Γ-Al2O3 catalyst: Effect of initial atmosphere and water-gas shift reaction

Onoriode P. Avbenake*, Rashid Al-Hajri, Baba Y. Jibril

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Ni-Co/γ-alumina catalyst was prepared and tested in upgrading of heavy crude oil. The parameter studied was the type of the pressurising gas and especially its effect on the water-gas shift reaction on the upgrading. The preliminary results suggested that a combination of the cracking reaction and the original water-in-oil which triggered a low temperature water-gas shift reaction generated hydrogen in-situ for the hydrogenation reaction. To further explore this, four major experimental runs were conducted; amongst which two were without catalysts and reactor inner liner in hydrogen and nitrogen environments, two were catalytically driven with and without a liner. The experimental conditions were 380 °C, 32 bar and residence time of 2 h with a catalyst/oil ratio of 0.01. The results show that API gravity, Hydrogen/Carbon ratio and light oil yields were slightly higher for the reaction in nitrogen atmosphere without liner as compared to hydrogen with liner– 15.8° 0.138, and 40.2 g respectively for the latter with 18.2° 0.177, and 45 g for the former. The catalytic reaction in hydrogen environment however; produced no coke as against the 0.2 wt% coke recorded with nitrogen. Meanwhile, the reduction in sulphur content and viscosity of the nitrogen experiment were higher compared to that of hydrogen.

Original languageEnglish
Pages (from-to)736-743
Number of pages8
Publication statusPublished - Jan 1 2019


  • Gas media
  • Heavy oil upgrading
  • Hydrocracking
  • NiCo/γ-AlO catalysts
  • Water-gas shift reaction

ASJC Scopus subject areas

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


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