Enhanced HDS and HYD activity of sulfide Co-PMo catalyst supported on alumina and structured mesoporous silica composite

• Published in: Catalysis today Vol. 377; pp. 82 - 91
• Main Authors: Glotov, A.P., Vutolkina, A.V., Vinogradov, N.A., Pimerzin, A.A., Vinokurov, V.A., Pimerzin, Al.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-10-2021
• Subjects: 12-molybdophosphoric heteropolyacid; CoMoS; HDS DBT; HYD naphthalene; mesoporous composite materials; supported catalysts; mesoporous composite materials; supported catalysts; HDS DBT; CoMoS; 12-molybdophosphoric heteropolyacid; HYD naphthalene
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2020.10.010

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•MCM-41-Al2O3 modified alumina was synthesized.•Co-PMo catalysts were prepared from PMo12-heteropolyacid and cobalt citrate.•Higher CoMoS phase dispersion on modified alumina.•TOF of DBT HDS and naphthalene HYD higher for composite supported catalyst.
Co-PMo catalysts were prepared from the 12-molybdophosphoric heteropolyacid and cobalt citrate on the base of freshly-synthesized alumina and mixed MCM-41-Al2O3 material. Carriers and catalysts were characterized by the following techniques: X-ray powder diffraction, low-temperature N2 adsorption, NH3-TPD, Raman spectroscopy, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. Prepared catalysts were tested in hydrodesulfurization of dibenzothiophene and hydrogenation of naphthalene. It has been shown that mesoporous silica incorporation into alumina can improve morphological properties of the CoMoS active phase as well as the overall HDT activity.