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Is it Possible to Reactivate Hydrotreating Catalyst Poisoned by Silicon? Full article

Journal Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308
Output data Year: 2021, Volume: 378, Pages: 43-56 Pages count : 14 DOI: 10.1016/j.cattod.2021.03.005
Tags hydrotreating; CoMo; poisoned by Si; reactivation
Authors Vatutina Yu.V. 1 , Kazakov M.O. 1 , Nadeina K.A. 1 , Budukva S.V. 1 , Danilova I.G. 1 , Gerasimov E.Yu. 1 , Suprun E.A. 1 , Prosvirin I.P. 1 , Nikolaeva O.A. 1 , Gabrienko A.A. 1 , Klimov O.V. 1 , Noskov A.S. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090, Novosibirsk, Russia

Funding (1)

1 Ministry of Science and Higher Education of the Russian Federation 0239-2021-0006

Abstract: The feasibility of the reactivation of CoMo/Al2O3 hydrotreating catalysts poisoned by Si compounds has been studied. CoMo/Al2O3 catalysts poisoned with 3, 4 and 5 wt.% of silicon were obtained during hydrotreating of diesel fraction contaminated with decamethylcyclopentasiloxane. Catalysts poisoned by different amount of silicon were regenerated by oxidative treatment and subsequently reactivated using citric acid solution. The catalysts were studied by nitrogen adsorption-desorption method, CHNS analysis, UV–Vis, thermal analysis, SEM, HRTEM, XPS. It was shown that the hydrodesulfurization activity of regenerated catalysts decreased with increasing silicon content. According to UV-Vis results, the increase in Si content on the spent catalyst leads to the formation of CoOx oxides after oxidative regeneration. Probably, cobalt oxides do not promote MoS2 slabs during sulfidation, convert to inactive Co species and decrease hydrodesulfurization activity. After reactivation procedure, there was the increase in active component particles dispersion, while catalytic activity in hydrodesulfurization of dibenzothiophene and hydrodenitrogenation of quinoline increased. It was established that hydrodesulfurization and hydrodenitrogenation activities of CoMo/Al2O3 catalyst with less than 3 wt.% of Si could be completely restored by reactivation.
Cite: Vatutina Y.V. , Kazakov M.O. , Nadeina K.A. , Budukva S.V. , Danilova I.G. , Gerasimov E.Y. , Suprun E.A. , Prosvirin I.P. , Nikolaeva O.A. , Gabrienko A.A. , Klimov O.V. , Noskov A.S.
Is it Possible to Reactivate Hydrotreating Catalyst Poisoned by Silicon?
Catalysis Today. 2021. V.378. P.43-56. DOI: 10.1016/j.cattod.2021.03.005 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Sep 2, 2020
Accepted: Mar 1, 2021
Published online: Mar 6, 2021
Published print: Oct 15, 2021
Identifiers:
Web of science: WOS:000687319200006
Scopus: 2-s2.0-85103029797
Elibrary: 46763876
Chemical Abstracts: 2021:726939
OpenAlex: W3133633803
Citing:
DB Citing
Scopus 10
Web of science 9
Elibrary 8
OpenAlex 11
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