On the Role of Brønsted Acidity in theOxidation of Benzene to Phenol by Nitrous Oxide Full article
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Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Output data | Year: 1996, Volume: 141, Number: 1-2, Pages: 185-192 Pages count : 8 DOI: 10.1016/0926-860X(96)00055-5 | ||||
| Tags | Acidity, Benzene, Hydroxylation, Nitrous oxide, Oxidation, Phenol, ZSM-5 | ||||
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Abstract:
Oxidation of benzene to phenol with nitrous oxide being an untypical reaction for zeolite catalysis arouses a great interest among researchers. Several hypotheses concerning reaction mechanism are discussed. Some of them assume a key role of the Brønsted acid centers (BAC), though few experimental support for this idea is available. The goal of this work is to study the Brønsted acidity of FeZSM-5 zeolite catalyst (0.13 wt.% Fe2O3) to reveal a relationship (if any) between the BAC concentration and the catalytic activity in benzene oxidation. Various pretreatments of the sample including a high-temperature calcination up to 900°C were used to vary the BAC concentration, which was measured by infrared spectrometry. No evidence of the Brønsted acidity importance for catalyzing the reaction was found. What is more, a formal inverse correlation was discovered. Thus, a manifold decrease in BAC concentration was accompanied by a remarkable increase in the oxidation rate, with a small acid recreation under the reaction conditions used. The obtained results support an earlier suggested redox mechanism of the reaction involving a special oxygen form produced at N2O decomposition on Fe-containing active sites.
Cite:
Sobolev V.I.
, Dubkov K.A.
, Paukshtis E.A.
, Pirutko L.V.
, Rodkin M.A.
, Kharitonov A.S.
, Panov G.I.
On the Role of Brønsted Acidity in theOxidation of Benzene to Phenol by Nitrous Oxide
Applied Catalysis A: General. 1996. V.141. N1-2. P.185-192. DOI: 10.1016/0926-860X(96)00055-5 WOS Scopus РИНЦ ANCAN OpenAlex
On the Role of Brønsted Acidity in theOxidation of Benzene to Phenol by Nitrous Oxide
Applied Catalysis A: General. 1996. V.141. N1-2. P.185-192. DOI: 10.1016/0926-860X(96)00055-5 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Oct 10, 1995 |
| Accepted: | Jan 29, 1996 |
| Published print: | Jul 4, 1996 |
| Published online: | Aug 31, 1998 |
Identifiers:
| Web of science: | WOS:A1996UW51500012 |
| Scopus: | 2-s2.0-0001539433 |
| Elibrary: | 13225683 |
| Chemical Abstracts: | 1996:347222 |
| Chemical Abstracts (print): | 125:86005 |
| OpenAlex: | W1992690563 |