Effect of the Composition and Morphology of the Active Phase of NiMoW/P-Al2O3 Catalysts with Different Mo/W Ratios on Their Activity in the Reactions of Dibenzothiophene Hydrogenolysis and Naphthalene Hydrogenation


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Abstract

A series of catalysts have been synthesized Ni–Mo–W/P-Al2O3 with different Mo: W ratios (a sample without W, Mo: W = 2: 1, Mo: W = 1: 1, Mo: W = 1: 2, and a sample without Мо) and a concentration of P2O5 in a support of 0.5 wt %. Heteropoly acids H3PMo12O40 · nH2O and H3PW12O40 · nH2O and nickel citrate were precursors of the active phase. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy were used to study the surface of the sulfide phase of the samples. Their catalytic activity was estimated in the reactions of dibenzothiophene hydrodesulfurization and naphthalene hydrogenation. A catalyst with the ratio Mo: W = 1: 1 showed the highest activity, and was characterized by the maximum concentration of atomic groups Ni–Mo–W–S, Mo–S, and W–S.

About the authors

P. S. Solmanov

Samara State Technical University

Author for correspondence.
Email: spase07@yandex.ru
Russian Federation, Samara, 443100

N. M. Maksimov

Samara State Technical University

Email: spase07@yandex.ru
Russian Federation, Samara, 443100

N. N. Tomina

Samara State Technical University

Email: spase07@yandex.ru
Russian Federation, Samara, 443100

A. A. Pimerzin

Samara State Technical University

Email: spase07@yandex.ru
Russian Federation, Samara, 443100

S. P. Verevkin

Samara State Technical University

Email: spase07@yandex.ru
Russian Federation, Samara, 443100

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