Water-assisted spreading of MoO_3 onto SiO_2-Al_2O_3 supports for preparation of sulfide CoMo hydrodesulfurization catalysts

摘要

Catalysts with various MoO_3 and Al_2O_3 contents were prepared by a reaction of acidic SiO_2-Al_2O_3 supports with aqueous slurry of M0O3. The saturated adsorption amount of MoO_3 corresponded with the amount of Al_2O_3 in the supports. The deposited and sulfided Mo species were accessible for promotion of the activity and selectivity in benzothiophene hydrodesulfurization reaction by Co. The acidity of the SiO_2-Al_2O_3 supports modified by dealumination by leaching with nitric acid in terms of cyclohexene isomerization and cumene cracking were preserved after deposition of the CoMo sulfide phase.