Hydrodesulfurization pathway of 4,6-dimethyldibenzothiophene through isomerization over Y-zeolite containing CoMo/Al2O3 catalyst

Takaaki Isoda, Shinichi Nagao, Xiaoliang Ma, Yozo Korai, Isao Mochida

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90 Citations (Scopus)

Abstract

Hydrodesulfurization (HDS) reactivity of a refractory sulfur species, 4,6-dimethyldibenzothiophene (4,6-DMDBT), was examined over a Y-zeolite containing CoMo/Al2O3 (CoMo/Al2O3-zeolite), conventional CoMo/Al2O3, and NiMo/Al2O3. Isomerization and considerable transalkylation of 4,6-DMDBT into 3,6-DMDBT and into trior tetramethyldibenzothiophenes, respectively, were observed characteristically over CoMo/Al2O3-zeolite catalyst. Migration of methyl groups enhances the HDS reactivity of the refractory sulfur species by diminishing the steric hindrance. Among the catalysts examined, CoMo/Al2O3-zeolite exhibited the best activity for HDS of the gas oil through the effective desulfurization of refractory alkyldibenzothiophenes.

Original languageEnglish
Pages (from-to)1078-1082
Number of pages5
JournalEnergy and Fuels
Volume10
Issue number5
DOIs
Publication statusPublished - 1996

All Science Journal Classification (ASJC) codes

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

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