EFFECT OF ZEOLITE ON HYDRODESULFURIZATION PERFORMANCE OF CoMoP/Al2O3 CATALYST

Abstract

Abstract: CoMoP/Al2O3-Y catalysts with USY zeolite as an acidic component were prepared. The samples were characterized by N2 adsorption-desorption, pyridine-FTIR, X-ray photoelectron spectra (XPS) and high-resolution transmission electron microscopy (HRTEM) techniques. The hydrodesulfurization performance of 4, 6-dimethyldibenzothiophene was evaluated over CoMoP/Al2O3-Y catalyst in a high pressure fixed-bed reactor. The results showed that compared with CoMoP/Al2O3, the introduction of USY zeolite significantly improves the conversion and S-removal rate, and changes the HDS product distribution. The transalkylation and cracking activities of CoMoP/Al2O3-Y catalyst increase substantially, the direct desulfurization activity is comparable in activity, however, the activity of hydrogenation route decreases over CoMoP/Al2O3-Y catalyst.

Key words: Zeolite, CoMoP catalyst, hydrodesulfurization, 4,6-dimethyldibenzothiophene

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