CoMo/Al2O3 hydrotreating catalysts prepared from single Co2Mo10- heteropolyacid at extremely high metal loading

A series of alumina supported CoMo catalysts with different molybdenum surface density was prepared using incipient wet impregnation method and applying H-6[Co2Mo10O38H4] (Co(2)Mo(10)HPA) as a single oxidic precursor. Dried and sulfided catalysts were characterized by a variety of techniques, such as N-2 adsorption, micro-Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). Catalytic properties have been examined in co-hydrotreating of dibenzothiophene and naphthalene using a fixed bed high-pressure flow reactor. It was found that using Co(2)Ma(10)HPA as a single precursor enables more than the double increase of maximum metal loading compared to conventional compounds. This also contributed to a significant increase in catalytic activity in hydrotreating.