Promoter nature effect on the sensitivity of Ni–Mo/Al2O3, Co–Mo/Al2O3, and Ni–Co–Mo/Al2O3 catalysts to dodecanoic acid in the co-hydrotreating of dibenzothiophene and naphthalene


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Abstract

The promoter nature effect on the sensitivity of Mo/Al2O3, Ni–Mo/Al2O3, Co–Mo/Al2O3, and Ni‒Co–Mo/Al2O3 catalysts to dodecanoic acid in the hydrotreating of a mixture containing dibenzothiophene and naphthalene has been investigated. The experiments have been carried out using a flow-through setup. The catalysts have been prepared using the PMo12 heteropoly acid, Сo(Ni) citrates, and Co2Mo10 heteropoly acid and have been characterized by high-resolution transmission electron microscopy. The highest hydrodesulfurization activity in the presence of dodecanoic acid is shown by the trimetallic catalyst Ni–Co–Mo/Al2O3. The introduction of Ni is favorable for dodecanoic acid conversion via the hydrogenation route, thus increasing the С11: С12 ratio in the conversion products. Effective dodecanoic acid adsorption constants under the hydrotreating conditions have been calculated using the Langmuir–Hinshelwood model.

About the authors

A. S. Koklyukhin

Samara State Technical University

Email: p.a.nikulshin@gmail.com
Russian Federation, Samara, 443100

A. V. Mozhaev

Samara State Technical University

Email: p.a.nikulshin@gmail.com
Russian Federation, Samara, 443100

V. A. Sal’nikov

Samara State Technical University

Email: p.a.nikulshin@gmail.com
Russian Federation, Samara, 443100

P. A. Nikul’shin

Samara State Technical University

Author for correspondence.
Email: p.a.nikulshin@gmail.com
Russian Federation, Samara, 443100

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