Highly active unsupported sulfide catalysts prepared from hydrothermal synthesis: Comparative study of Mo and CoMo or NiMo sulfide catalysts

Boonyawan Yoosuk, Jae Hyung Kim, Chunshan Song, Chawalit Ngamcharussrivichai, Pattarapan Prasassarakich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A comparative study of unsupported MoS2 and Me/MoS2 (Me=Co, Ni) catalysts prepared by a hydrothermal synthesized method developed in our laboratory is herein reported. BET showed that unsupported Mo sulfide catalyst prepared by hydrothermal method has high surface area. The addition of promoters (Ni and Co) decreased significantly surface area and pore volume of unsupported Mo sulfide. HRTEM result is consistent with XRD pattern that promoters prevent the growth and aggregation of MoS2 microdomains. The simultaneous HDS of DBT and 4,6-DMDBT were used to study the promoter effect of Co or Ni on the HDS activity of unsupported MoS2 catalyst. Surprisingly, 4,6-DMDBT is slightly more active than DBT over unsupported MoS2 catalyst. However, as generally observed, on the unsupported CoMo and NiMo catalyst, DBT was much active than 4,6-DMDBT. Unlike most catalysts reported in literature, 4,6-DMDBT is not much less reactive than DBT over all of the unsupported catalysts prepared by our method. It was therefore concluded that the main effect of the promoter on the HDS of DBT type molecules was to increase the rate of the C-S bond cleavage provided this reaction was not hindered by steric constraints.

Original languageEnglish (US)
Title of host publicationAbstracts of Papers - 232nd American Chemical Society Meeting and Exposition
Volume232
StatePublished - Dec 1 2006
Event232nd American Chemical Society Meeting and Exposition - San Francisco, CA, United States
Duration: Sep 10 2006Sep 14 2006

Other

Other232nd American Chemical Society Meeting and Exposition
CountryUnited States
CitySan Francisco, CA
Period9/10/069/14/06

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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