Catalysis by Mo-based Monometallic and Bimetallic Carbides and Sulfides for Simultaneous Hydrodesulfurization, Hydrodenitrogenation, and C-C Hydrogenolysis

Molybdenum based sulfide catalysts are widely used in hydroprocessing of petroleum fractions in refining industry. Multi-probe molecular reactions for simultaneous HDS, HDN, and C-C hydrogenolysis over Mo-based monometallic and bimetallic carbide and sulfide catalysts, in conjunction with the work on single-probe molecular reactions were presented. A multi-component model-feedstock was used to test catalytic functions. These reactions were precisely those involved in the conversion and processing of heavy hydrocarbon resources such as heavy oil, coal, and other residual materials. The multi-component feed includes 4-(1-naphthylmethyl)bibenzyl, dibenzothiophene, quinoline, pyrene, and eicosane. ATTM and Co-Mo/Al₂O₃ and Ni-Mo/Al₂O₃ showed high activity on hydrogenolysis and hydrogenation properties. Mo₂C exhibited low activity on the model compounds, indicating Mo₂C was strongly affected by the existence of other co-reactants. ATTM performed as a better catalyst precursor on HDN than even the commercial Co-Mo/Al₂O₃ and Ni-Mo/Al₂O₃ catalysts.