New perspectives about the role of cobalt in hydrodesulfurization catalysis

Gilles D. Berhault, Myriam Perez, Alejandra Camacho, Sergio Fuentes, Miguel J. Yacaman, Apurva Mehta, Russell R. Chianelli

Research output: Contribution to journalArticlepeer-review

Abstract

The disordered state of Co(Ni) promoted MoS 2-based catalysts has hindered the understanding of the structure/function relationships in these solids. Synchrotron X-ray scattering reveals features otherwise undetectable using classical sources of X-rays that leads to a complete determination of the dispersion of well-dispersed supported catalysts. In combination with HREM, this technique has led to new important results about CoMo catalysts: Co promotion strongly favors the formation of multilayered slabs; hydrotreating conditions induce a destacking process that results from a combination of carbonaceous deposits and high pressure during reaction (commercial CoMo/Al 2O 3 catalysts tend to destack with time of use); and using a synchrotron source revealed the presence of Co 9S 8 as a secondary phase which tends to be reduced into Co metal under severe conditions. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).

Original languageEnglish (US)
Pages (from-to)PETR-21
JournalACS National Meeting Book of Abstracts
Volume228
Issue number2
StatePublished - 2004
Externally publishedYes
EventAbstracts of Papers - 228th ACS National Meeting - Philadelphia, PA, United States
Duration: Aug 22 2004Aug 26 2004

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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