Equlibrium studies of [CpRu(η6-DBT)]+ with various aromatic ligands: Models for adsorption of aromatics on hydrodesulfurization catalysts

Moon Gun Choi, Robert J. Angelici

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


Deep hydrodesulfurization (HDS) of petroleum feedstocks is becoming more important and necessary worldwide as governments reduce further sulfur levels diesel and gasoline fuels. After initial hydrotreatment, the main refractory sulfur compounds remaining are dibezothiophene (DBT) derivatives which make deep hydrodesulfurization difficult. The influence of nitrogen compounds and aromatic species on HDS catalyst activity becomes more significant under deep hydrodesulfurization conditions. It is of great interest to have a better knowledge of the binding of refractory sulfur compounds and other aromatic components, such as nitrogen compounds and polyaromatic species, to metal sites on the catalyst. Equilibrium constants for the displacement of DBT in [CpRu(η6-DBT)](PF6) with a series of nitrogen cyclic compounds and polyaromatic species (L) were measured in order to understand the inhibitory effects of nitrogen and aromatic species on hydrodesulfurization reactions. The relative binding strengths decrease in the order mesitylene > toluene > (3-Me)indole - tetrahydronaphthalene > indole > carbazole - (3-Et)carbazole > benzene > fluorene - (3,6-(t-Bu)2)carbazole > biphenyl > (4,6-Et2)DBT > phenanthrene > (2-Me)naphthalene - (1-Me)naphthalene - naphthalene > (3,6-Br2)carbazole. These results will be discussed in the context of their tendencies to inhibit HDS reactions.

Original languageEnglish
Title of host publication233rd ACS National Meeting, Abstracts of Scientific Papers
Publication statusPublished - 2007
Event233rd ACS National Meeting - Chicago, IL, United States
Duration: 2007 Mar 252007 Mar 29

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727


Other233rd ACS National Meeting
Country/TerritoryUnited States
CityChicago, IL

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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