Hydroconversion of Thiophene Derivatives over Dispersed Ni–Mo Sulfide Catalysts

The activity of unsupported Ni–Mo sulfide catalysts is studied in the hydroconversion of benzothiophene and dibenzothiophenes in the temperature range of 340–380°С and at an increased H 2 pressure and in the СО/H 2 О system. The structure of dispersed catalysts formed by the in situ high-temperature...

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Bibliographic Details
Published in:Petroleum chemistry 2018-12, Vol.58 (14), p.1227-1232
Main Authors: Vutolkina, A. V., Makhmutov, D. F., Zanina, A. V., Maximov, A. L., Kopitsin, D. S., Glotov, A. P., Egazar’yants, S. V., Karakhanov, E. A.
Format: Article
Language:English
Subjects:
Aromatic compounds
Benzothiophene
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
Dibenzothiophene
Dispersion
High temperature
Hydrogenation
Industrial Chemistry/Chemical Engineering
Molybdenum
Nickel
Sulfides
Thiophene
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Summary:The activity of unsupported Ni–Mo sulfide catalysts is studied in the hydroconversion of benzothiophene and dibenzothiophenes in the temperature range of 340–380°С and at an increased H 2 pressure and in the СО/H 2 О system. The structure of dispersed catalysts formed by the in situ high-temperature decomposition of oil-soluble precursors (molybdenum hexacarbonyl, nickel naphthenate) is investigated by TEM. Effects of СО/H 2 О molar ratio, water mass content in the system, and CO pressure on the activity of the catalysts and yields of the products are explored. It is shown that, in the СО/H 2 О system, the highest conversion of benzothiophene and dibenzothiophene is attained at a temperature of 380°С, a СО pressure of 5 MPa, and a СО/H 2 О molar ratio of 2. The introduction of alkyl substituents into a dibenzothiophene molecule causes a reduction in the rate of reaction that predominantly occurs via the hydrogenation of aromatic rings. The catalyst activities in hydrogenation under H 2 pressure and in the СО/H 2 О system are comparable.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544118140141