Abstract: Gas-phase oxidation of phenol to dihydroxybenzenes (DHB) with nitrous oxide was performed over a set of ZSM-5 zeolites steamed at different temperatures in the range from 550 to 750 °C. The best of the catalysts demonstrated 70% N2O conversion and a more than 90% selectivity for DHB. However, significant differences were observed in DHB isomer distribution and catalyst deactivation due to changes in the acidity of the zeolites. The steaming procedure reduces the concentration of Bronsted acid sites, thus allowing a decrease in coke loading. Simultaneously, a substantial decline in the molar ratio of hydroquinone to catechol in the reaction products was observed, mainly due to the increased selectivity to the ortho isomer – catechol. These results can be used to control the selectivity for different DHB isomers in the title reaction by varying steaming severity.

Cite: Ivanov D.P. , Pirutko L.V. , Panov G.I.
Effect of Steaming on the Catalytic Performance of ZSM-5 Zeolite in the Selective Oxidation of Phenol by Nitrous Oxide
Journal of Catalysis. 2014. V.311. P.424-432. DOI: 10.1016/j.jcat.2013.12.010 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Sep 6, 2013
Accepted:	Dec 24, 2013
Published online:	Jan 31, 2014
Published print:	Mar 1, 2014

Identifiers:

Web of science:	WOS:000333489500046
Scopus:	2-s2.0-84893516086
Elibrary:	21864074
Chemical Abstracts:	2014:284090
Chemical Abstracts (print):	160:327894
OpenAlex:	W2070925295

Citing:

DB	Citing
Web of science	36
Scopus	40
Elibrary	32
OpenAlex	37

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