Tuning the Mechanism of H/D Exchange for Isobutane on H‐BEA by Loading Zn Species in Zeolite Full article
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Chemistry - A European Journal
ISSN: 0947-6539 , E-ISSN: 1521-3765 |
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| Output data | Year: 2023, Volume: 29, Number: 5, Article number : e202202962, Pages count : 9 DOI: 10.1002/chem.202202962 | ||||
| Tags | isobutane; H/D exchange; mechanism; zeolite; NMR spectroscopy in situ | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | German Research Foundation | HA 1893/22-1 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0003 |
Abstract:
Kinetics of H/D hydrogen exchange between deuterated isobutane- d 10 and Brønsted acid sites (BAS) of three zeolite samples (H-BEA, ZnO/H-BEA, Zn 2+ /H-BEA) were monitored with 1 H MAS NMR in situ at 343–468 K. The regioselective H/D exchange in the methyl groups detected on H-BEA can be rationalized in terms of the mechanism of indirect exchange, which involves protonation of the intermediate olefin and further hydride abstraction from the other alkane molecule by the formed carbenium ion. Loading of Zn species in zeolite results in decrease of the rate and increase of the activation energy of the exchange. The loaded Zn species provide the tuning effect on the reaction occurrence, changing the mechanism from the indirect one to the mechanism of the direct exchange.
Cite:
Arzumanov S.S.
, Gabrienko A.A.
, Freude D.
, Haase J.
, Stepanov A.G.
Tuning the Mechanism of H/D Exchange for Isobutane on H‐BEA by Loading Zn Species in Zeolite
Chemistry - A European Journal. 2023. V.29. N5. e202202962 :1-9. DOI: 10.1002/chem.202202962 WOS Scopus РИНЦ AN PMID OpenAlex
Tuning the Mechanism of H/D Exchange for Isobutane on H‐BEA by Loading Zn Species in Zeolite
Chemistry - A European Journal. 2023. V.29. N5. e202202962 :1-9. DOI: 10.1002/chem.202202962 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Sep 21, 2022 |
| Accepted: | Oct 28, 2022 |
| Published online: | Oct 30, 2022 |
| Published print: | Jan 24, 2023 |
Identifiers:
| Web of science: | WOS:000896465900001 |
| Scopus: | 2-s2.0-85143421565 |
| Elibrary: | 54016024 |
| Chemical Abstracts: | 2022:3078317 |
| PMID: | 36310393 |
| OpenAlex: | W4307777298 |