Genesis of HDT catalysts prepared with the use of Co2Mo10HPA and cobalt citrate: Study of their gas and liquid phase sulfidation

摘要: Abstract Genesis of alumina supported hydrotreating (HDT) catalysts prepared with the use decamolybdodicobaltate heteropolyanion (Co2Mo10HPA) and cobalt citrate during their sulfidation processes deactivation in diesel HDT has been investigated. The stage was studied for two procedures: gas phase by H2S/H2 liquid treatment a mixture dimethyldisulfide at various temperatures durations. have N2 adsorption, thermogravimetric analysis, X-ray photoelectron spectroscopy high-resolution transmission electron microscopy methods. were tested 70 wt.% straight run oil 16 wt.% light cycle 14 wt.% coker oil. Mechanisms active formation course established. It found that led to CoMoS higher content comparing catalyst initial activity treated also than subjected sulfidation. Catalytic examination after accelerated conditions showed sulfided sample more resistant deactivation. Probably it is due stabilization particles coke formed intensively results discussed using recently developed concept interlayer dynamics sites phase.