The critical role of Zr in controlling the activity of Pd/Beta on the hydrogenation of phenol to cyclohexanone

[Display omitted] The promoting effect of zirconium addition on Pd/Beta catalysts has been investigated in the selective hydrogenation of phenol to cyclohexanone in the aqueous phase. The activity of the catalyst in the reaction was greatly improved by introducing Zr atoms into the framework of H-Be...

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Bibliographic Details
Published in:Chinese journal of chemical engineering 2023-05, Vol.57 (5), p.79-87
Main Authors: Gao, Bin, Chen, Junwen, Zuo, Qi, Wang, Hongyan, Li, Wenlin
Format: Article
Language:English
Subjects:
Cyclohexanone
Palladium
Phenol hydrogenation
Zeolite
Zirconium
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Summary:[Display omitted] The promoting effect of zirconium addition on Pd/Beta catalysts has been investigated in the selective hydrogenation of phenol to cyclohexanone in the aqueous phase. The activity of the catalyst in the reaction was greatly improved by introducing Zr atoms into the framework of H-Beta zeolite. An important synergy between the Zr species and Pd, affecting the Pd dispersion state on the support, has been observed. The modification of the support with Zr4+ improves the Lewis/Brønsted acid ratio of the catalyst, suppressing the further transformation of cyclohexanone. The kinetics of Pd/Zr-Beta catalyst showed high selectivity to cyclohexanone. The catalytic results showed that the Pd/Zr-Beta had the best catalytic performance at the desired temperature of 80 °C for 5 h.
ISSN:1004-9541
2210-321X
DOI:10.1016/j.cjche.2022.07.033