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, Number: 6, Pages: 600-607 Pages count : 8 DOI: 10.1002/mrc.5126 | ||
| Tags | EPR, acidic sites, carbon deposits, NiMo catalysts, modified alumina | ||
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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 electron paramagnetic resonance (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 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 thermogravimetric analysis [TGA]/differential thermal analysis [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. N6. P.600-607. DOI: 10.1002/mrc.5126 WOS Scopus РИНЦ ANCAN PMID OpenAlex publication_identifier_short.sciact_ihcp_identifier_type
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. N6. P.600-607. DOI: 10.1002/mrc.5126 WOS Scopus РИНЦ ANCAN PMID OpenAlex publication_identifier_short.sciact_ihcp_identifier_type
Dates:
| Submitted: | Oct 14, 2020 |
| Accepted: | Dec 18, 2020 |
| Published online: | Dec 23, 2020 |
| Published print: | Jun 1, 2021 |
Identifiers:
| Web of science: | WOS:000604531000001 |
| Scopus: | 2-s2.0-85099034311 |
| Elibrary: | 45023209 |
| Chemical Abstracts: | 2021:46965 |
| Chemical Abstracts (print): | 174:935519 |
| PMID: | 33368711 |
| OpenAlex: | W3117330271 |
| publication_identifier.sciact_ihcp_identifier_type: | 3340 |