Medium severity hydrotreating and hydrocracking of Israeli shale oil: III. Hydrocracking of hydrotreated shale oil and its atmospheric residue for full conversion to motor fuels

M. V. Landau, M. Herskowitz, D. Givoni, S. Laichter, D. Yitzhaki

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Hydrocracking of hydrotreated Israeli shale oil and its atmospheric residue was studied at 50 atm hydrogen pressure, LHSV 0.5-4.4 h-1, temperature 350°C and VH2 1500 N1/1 in a fixed bed reactor pilot plant with two Ni-Mo-zeolite catalysts based on mono-(HY + Al2O3) and bizeolite (HY + H-ZSM-5 + Al2O3) supports. Desulfurization and denitrogenation conversion of the feedstock was higher than 99.7% (sulfur content 134 ppm, nitrogen content 4.4 ppm) and it comprised 14 vol.% atmospheric residue boiling out at 360°C +. Hydrocracking of the whole hydrotreated shale oil yielded full conversion of atmospheric residue at LHSV = 2.75 h-1 with monozeolite catalyst (A) and at LHSV = 3.5 h-1 with biozeolite catalyst (B). The yield of liquid fuel at these conditions was 87.6 wt% with catalyst A versus 82.4 wt% with catalyst B. The contents of light naphtha ( < 100°C), heavy naphtha ( < 200°C) and jet fuel (160-280°C) in the liquid product were 10-15% higher with catalyst B compared with A. Hydrocracking at full residue conversion produced shifts of the hydrocarbon distributions to lighter molecules inside the hydrocarbon groups, decreased n-paraffins concentrations by isomerization and splitting to C5-. Hydrocracking of the atmospheric residue with catalyst A yielded full conversion into 360°C-products at LHSV = 0.5 h-1. The only liquid product obtained in this case at 72.3% yield was naphtha with distillation patterns corresponding to gasoline specification. The nitrogen content in the liquid hydrocracking products at full conversion of atmospheric residue fraction of the shale oil was < 1 ppm and the sulfur content < 15 ppm.

Original languageEnglish
Pages (from-to)1589-1597
Number of pages9
JournalFuel
Volume77
Issue number14
DOIs
StatePublished - 1 Jan 1998

Keywords

  • Catalyst
  • Hydrocracking
  • Motor fuel
  • Shale oil
  • Zeolite

Fingerprint

Dive into the research topics of 'Medium severity hydrotreating and hydrocracking of Israeli shale oil: III. Hydrocracking of hydrotreated shale oil and its atmospheric residue for full conversion to motor fuels'. Together they form a unique fingerprint.

Cite this