Molybdenum/cobalt/sulfur clusters: Models and precursors for hydrodesulfurization (HDS) catalysts

Surface science models for CoMo hydrodesulfurization catalysts: Influence of the support on hydrodesulfurization activity

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Sonochemical preparation of supported hydrodesulfurization catalysts.

Sonochemical preparation of Co and Ni promoted MoS(2) supported on alumina was achieved by high-intensity ultrasonic irradiation of isodurene solutions containing molybdenum carbonyl, dicobalt octacarbonyl, elemental sulfur, and Al(2)O(3) or Ni-Al(2)O(3) under Ar flow. The sonochemically prepared catalysts were characterized by elemental analysis, XPS, SEM, TEM, and XEDS, and hydrodesulfurizati...

One Step Closer to Structural Models for HDS Catalysts: Thienyl-Oxo Complexes of Re(V)

The present investigation focuses on thiophene derivatives of oxometal centers with low d-electron counts. Treatment of a THF slurry of ReOCl3(PPh3)2 with thienyllithium reagents afforded Li(THF),ReO(thienyl)4 where thienyl is 2-C&S, 2-MeCd-l~ 2-CsHsS (benzothienyl), and 2-ClzH7S (dibenzothienyl). In contrast to the previously reported low-valent derivatives these species are reactive toward pr...

Molecular Gold Clusters as Precursors to Heterogeneous Catalysts

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Transition Metal Sulfide Catalysts for Petroleum Upgrading – Hydrodesulfurization Reactions