Mesoporous molecular sieve MCM-41 supported Co-Mo catalyst for hydrodesulfurization of dibenzothiophene in distillate fuels

Chunshan Song, Kondam Madhusudan Reddy

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172 Scopus citations

Abstract

A mesoporous aluminosilicate molecular sieve with MCM-41 type structure was synthesized using aluminum isopropoxide as the Al source. Supported Co-Mo/MCM-41 catalysts were prepared by co-impregnation of Co(NO3)2·6H2O and (NH4)6Mo7O24 followed by calcination and sulfidation. For comparison, conventional Al2O3-supported sulfided Co-Mo catalysts were also prepared using the same procedure. These two types of catalysts were examined at two different metal loading levels in hydrodesulfurization of a model fuel containing 3.5 wt% sulfur as dibenzothiophene in n-tridecane. At 350-375°C under higher H2 pressure (6.9 MPa), sulfided Co-Mo/MCM-41 catalysts show higher hydrogenation and hydrocracking activities at both normal and high metal loading levels, whereas Co-Mo/Al2O3 catalysts show higher selectivity to desulfurization. Co-Mo/MCM-41 catalyst at high metal loading level is substantially more active than the Co-Mo/Al2O3 catalysts.

Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalApplied Catalysis A: General
Volume176
Issue number1
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

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