HIGHLY DISPERSED COBALT CATALYSTS MODIFIED WITH TRANSITION METALS AND THEIR APPLICATIONS TO CO HYDROGENATION AND RELATED REACTIONS
Professor Yoshihiro Sugi
Department of Chemistry
Faculty of Engineering
Gifu University, Gifu, 501-11 Japan
Friday, July 30, 1999 3:30 pm
Ben Bandy Conference Center
Center for Applied Energy Research
Cobalt metal has been known as the catalyst for Fischer-Tropsch synthesis to produce hydrocarbons. Product distributions vary with the nature of cobalt catalysts. In the presence of the transition metals, such as Ru, Ir, Re, Rh, etc., Co/SiO2 catalyst, derived from cobalt(II) acetate, easily forms highly dispersed metallic cobalt particles by the reduction of cobalt(II) with spillovered hydrogen.
In this talk, we describe the preparation and the characterization of highly dispersed cobalt catalysts from cobalt(II) on SiO2. Catalysts were prepared by impregnation of aqueous solutions of Co(II) acetate, nitrate and chloride.
The characterizationsof these catalysts were carried out using by EXAFS, XPS, XRD, etc. The catalysts have high activity for CO hydrogenation and ethene hydroformylation to give oxygenates with relatively high activity and selectivity.