In-situ upgrading of Omani heavy oil with catalyst and hydrogen donor

Abdullahi Yusuf, Rashid S. Al-Hajri, Yahya M. Al-Waheibi, Baba Y. Jibril

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Catalytic aquathermolysis of Omani heavy oil was carried out with NiMo-oleate as an oil soluble viscosity reducing catalyst and glycerol as a hydrogen donor for the first time. The synthesized catalyst was characterized with Fourier Transform Infrared Spectroscopy(FTIR) and X-ray diffraction (XRD).The experiments were carried out in a Parr reactor under nitrogen atmosphere with varying reaction time (24-72 h), glycerol concentration (0-10 wt%), catalyst loading(0-1 wt%), amount of water (0-42 wt%) and the reaction temperature (200-304 °C). Maximum viscosity reduction of 69% (1490-490 cP at 70 °C) occurred at 277 °C reaction temperature and 30 h of reaction. Fourier transform infrared spectra (FT-IR) before and after catalytic aquathermolysis show an increase in the saturate bonds of alkyl groups and a decrease in unsaturated bonds of transalkene groups of the hydrocarbons indicative of hydrogenation activities of the catalyst and glycerol. In addition, gas chromatography (GC) analysis confirmed an increase in lower boiling point components after catalytic aquathermolysis, while asphaltene precipitation showed a decrease in asphaltene content.

Original languageEnglish
Pages (from-to)102-112
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume121
DOIs
Publication statusPublished - Sep 1 2016

Keywords

  • Aquathermolysis
  • Hydrogen donor
  • Oil soluble catalyst

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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