Effect of Silver Cations on Propene Aromatization on H-ZSM-5 Zeolite Investigated by 13C MAS NMR and FTIR Spectroscopy Full article
| Journal |
ACS Catalysis
ISSN: 2155-5435 |
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| Output data | Year: 2023, Volume: 13, Number: 15, Pages: 10248-10260 Pages count : 13 DOI: 10.1021/acscatal.3c01591 | ||
| Tags | propene; aromatization; silver-modified zeolite; ZSM-5; solid-state NMR; FTIR spectroscopy; Bronsted acid sites | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0003 |
| 2 | Russian Science Foundation | 21-73-10013 |
Abstract:
Silver-modified zeolites exhibit high selectivity foralkene transformationto aromatic hydrocarbons. To inquire into the effect of silver cationsin zeolite on the pathways of propene aromatization, the transformationsof propene on H-ZSM-5 and Ag/H-ZSM-5 zeolites have been investigatedby C-13 MAS NMR and Fourier-transform infrared spectroscopy.It is established that propene transformation on H-ZSM-5 at 296-773K occurs on Bronsted acid sites (BAS) by the mechanism of conjunctpolymerization, as evidenced by the detection of cyclopentenyl cationintermediates. On the contrary, propene forms very stable & pi;-complexeswith Ag+ sites on Ag/H-ZSM-5, which prevents the alkenefrom converting on BAS at 296-623 K. At T & GE;623 K, transformation proceeds with the assistance of silver cationsvia carbanionic allyl-like intermediate formation. Thus, the changein the reaction mechanism from conjunct polymerization on BAS to themechanism with Ag+ ion involvement provides high selectivityfor aromatic hydrocarbons on Ag+/H-ZSM-5 zeolite.
Cite:
Lashchinskaya Z.N.
, Gabrienko A.A.
, Prosvirin I.P.
, Toktarev A.V.
, Stepanov A.G.
Effect of Silver Cations on Propene Aromatization on H-ZSM-5 Zeolite Investigated by 13C MAS NMR and FTIR Spectroscopy
ACS Catalysis. 2023. V.13. N15. P.10248-10260. DOI: 10.1021/acscatal.3c01591 WOS Scopus РИНЦ AN OpenAlex
Effect of Silver Cations on Propene Aromatization on H-ZSM-5 Zeolite Investigated by 13C MAS NMR and FTIR Spectroscopy
ACS Catalysis. 2023. V.13. N15. P.10248-10260. DOI: 10.1021/acscatal.3c01591 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Apr 7, 2023 |
| Accepted: | Jul 12, 2023 |
| Published online: | Jul 21, 2023 |
| Published print: | Aug 4, 2023 |
Identifiers:
| Web of science: | WOS:001033840000001 |
| Scopus: | 2-s2.0-85166763137 |
| Elibrary: | 54372689 |
| Chemical Abstracts: | 2023:1508513 |
| OpenAlex: | W4385147627 |