Novel Ru-based hydrodesulfurization catalysts

COLL 214

Melissa Pease and Mark E. Bussell. Department of Chemistry, MS-9150, Western Washington University, 516 High Street, Bellingham, WA 98225-9150
Regulations to be implemented in the near future will require a reduction of the sulfur levels in transportation fuels. As a result, the development of highly active catalysts for use in the hydrodesulfurization (HDS) process is of primary importance. Research in our laboratory has shown that oxide-supported, crystalline metal phosphide and amorphous metal-boron materials are more active than conventional sulfide-based catalysts for thiophene HDS. In the current study, ruthenium phosphides (Ru2P, RuP and RuP2) and ruthenium-boron alloys (Ru-B) have been supported on silica and the materials have been characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and chemisorption measurements. The thiophene HDS activities of the Ru-based catalysts have been measured in a flow reactor and the properties of these catalysts will be compared with those of sulfide catalysts.