aInstitute of Coal Chemistry of PAN, Sowińskiego 5, 44-121 Gliwice, Poland
bLaboratoire Réactivité de Surface, UMR CNRS 7609, Casier 178, Université P. & M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France
Abstract:
The molybdenum and tungsten carbides (Mo2C and W2C) were synthesized, characterized and tested in hydrodesulfurization (HDS) of dibenzothiophene (DBT). The phase purity of these catalysts was established by X-ray diffraction (XRD), and the surface properties were determined by N2 BET specific surface area (Sg) measurements, CO chemisorption and high-resolution transmission electron microscopy (HRTEM). The activities of catalysts were determined during the HDS of DBT at a temperature of 613 K and under a 6 MPa total pressure. Both molybdenum and tungsten carbides were active in HDS of DBT. The reactivity studies showed that molybdenum carbide was more active than tungsten carbide related to weight. However, W2C was shown to possess stronger hydrogenating properties.