The deactivation of acidic sites of NiMo/B2O3–Al2O3 catalysts during vegetable oil hydrodeoxygenation studied by EPR spectroscopy Full article
| Journal |
Magnetic Resonance in Chemistry
ISSN: 0749-1581 , E-ISSN: 1097-458X |
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| Output data | Year: 2021, Volume: 59, Pages: 600-607 Pages count : 8 DOI: 10.1002/mrc.5126 | ||
| Tags | EPR; acidic sites; carbon deposits; NiMo catalysts; modified alumina | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | V. 47 |
Abstract:
This paper presents the study results of NiMo/B2O3-Al2O3 (0-30 % wt. of B2O3) catalysts for vegetable oil hydrodeoxygenation before and after catalytic tests by different EPR methodologies. For the initial catalysts, the concentration of Brønsted acidic sites (BAS) determined by probe EPR with perylene increases linearly with an increase in the modifier (B2O3) content in the samples. It was found that the isomerization activity of the catalysts is
increases with increasing the concentration of determined BAS. As for the spent catalysts, linear correlation of paramagnetic species concentration with the content of carbon deposits (determined by TGA/DTA) was found. The main reasons for the NiMo/B2O3-Al2O3 catalysts deactivation over the formation of carbon deposits related to the participation of acidic sites (both Lewis and Brønsted) in the polycondensation of hydrocarbons via radical species are
also proposed.
Cite:
Yurpalov V.L.
, Neponiashchii A.A.
, Drozdov V.A.
, Antonicheva N.V.
, Buluchevskiy E.A.
, Lavrenov A.V.
The deactivation of acidic sites of NiMo/B2O3–Al2O3 catalysts during vegetable oil hydrodeoxygenation studied by EPR spectroscopy
Magnetic Resonance in Chemistry. 2021. V.59. P.600-607. DOI: 10.1002/mrc.5126 WOS Scopus РИНЦ OpenAlex
The deactivation of acidic sites of NiMo/B2O3–Al2O3 catalysts during vegetable oil hydrodeoxygenation studied by EPR spectroscopy
Magnetic Resonance in Chemistry. 2021. V.59. P.600-607. DOI: 10.1002/mrc.5126 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Oct 14, 2020 |
| Accepted: | Dec 23, 2020 |
| Published online: | Jan 4, 2021 |
| Published print: | Apr 27, 2021 |
Identifiers:
| Web of science: | WOS:000604531000001 |
| Scopus: | 2-s2.0-85099034311 |
| Elibrary: | 45023209 |
| OpenAlex: | W3117330271 |