Cobalt salts of decamolybdodicobaltic acid as precursors of the highly reactive type II CoMoS phase in hydrorefining catalysts

Cobalt salts of decamolybdodicobaltic acid as precursors of the highly reactive type II CoMoS phase in hydrorefining catalysts Full article

Journal

Kinetics and Catalysis
ISSN: 1608-3210 , E-ISSN: 0023-1584

Output data

Year: 2011, Volume: 52, Number: 6, Pages: 862-875 Pages count : 14 DOI: 10.1134/s0023158411060152

Authors

Nikul’shin P.A. ^1,2 , Mozhaev A.V. ¹ , Pimerzin A.A. ¹ , Tomina N.N. ¹ , Konovalov V.V. ¹ , Kogan V.M. ³

Affiliations

1	Samara State Technical University, Samara, 443030, Russia
2	Middle Volga Institute of Oil Refining, Novokuibyshevsk, Samara oblast, 446200 Russia
3	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia

Catalysts have been synthesized using the Anderson polyoxometalates (POMs) (NH4)4[Ni(OH)6Mo6O18] (NiMo6POM), (NH4)6[Co2Mo10O38H4] · 7H2O (Co2Mo10POM), and H6[Co2Mo10O38H4] (Co2Mo10HPA) as the precursors and hydrogen peroxide as the solvent. The catalysts have been characterized by low-temperature nitrogen adsorption, XPS, and HRTEM. Their catalytic properties have been tested in thiophene hydrodesulfurization and in the hydrodesulfurization and hydrogenation of components of diesel oil. The active phase of the catalysts synthesized using the POMs is the type II CoMoS phase in which the mean plate length is 3.6–3.9 nm and the mean number of MoS2 plate per plate packet is 1.8–2.0. Use of hydrogen peroxide provides an efficient means to reduce the proportion of Co2+ promoter atoms surrounded by oxygen in the case of an impregnating solution containing both an ammonium salt of a heteropoly acid and a Co2+ salt. In the catalysts synthesized using cobalt salts of Co2Mo10HPA, the support surface contains the multilayer type II CoMoS phase and cobalt sulfides. These catalyst show high catalytic properties in thiophene hydrogenolysis and diesel oil hydrorefining. Models are suggested for the catalysts synthesized using Anderson POMs.

Nikul’shin P.A. , Mozhaev A.V. , Pimerzin A.A. , Tomina N.N. , Konovalov V.V. , Kogan V.M.
Cobalt salts of decamolybdodicobaltic acid as precursors of the highly reactive type II CoMoS phase in hydrorefining catalysts
Kinetics and Catalysis. 2011. V.52. N6. P.862-875. DOI: 10.1134/s0023158411060152 WOS Scopus OpenAlex

Web of science:	WOS:000297630200014
Scopus:	2-s2.0-84855907190
OpenAlex:	W2063486628

DB	Citing
OpenAlex	20
Scopus	20
Web of science	20