Formation of insoluble Anderson-type heteropoly molybdates in citrate Ni–Mo and Co–Mo impregnation solutions used to prepare HDS catalysts: Causes and effects on catalytic activity
This study reveals that the formation of insoluble Anderson-type heteropoly molybdates in citrate-based Ni–Mo and Co–Mo impregnation solutions leads to increased actual metal loading, which, after transformation into sulfide species during sulfidation, enhances the hydrodesulfurization activity of the resulting catalysts.