[2009.11.14]

A hierarchical Fe/ZSM-5 zeolite with superior catalytic performance for benzene hydroxylation to phenol

Figure 1 Reaction rate of phenol as a function of the time on stream for hierarchical () mesoFe/ZSM-5-ES and () mesoFe/ZSM-5-S, and conventional () Fe/ZSM-5-S (T=350 ºC, GHSV 30000 h-1, 1 vol% C6H6 and 4 vol% N2O in He).

 

Figure 2 Scanning and transmission electron micrographs of hierarchical mesoFe/ZSM-5-ES with spherical morphologies and microporous domains fused in highly mesoporous matrix.

 

Communication 

A hierarchical Fe/ZSM-5 zeolite with superior catalytic performance for benzene hydroxylation to phenol

Hongchuan Xin, Arjan Koekkoek, Qihua Yang, Rutger van Santen, Can Li, and Emiel J. M. Hensen

Published online on Chem. Commun., 2009 DOI: 10.1039/b917038c Communication 

Abstract

We report the one-step synthesis of a highly active hierarchical Fe/ZSM-5 zeolite catalyst with a strongly improved lifetime in the selective hydroxylation of benzene to phenol with nitrous oxide; compared to the best Fe/ZSM-5 catalyst, the turnover number after 24 h on stream is almost four times higher. The integration of very small microporous domains into a highly accessible mesoporous matrix alleviates the detrimental effects of pore blocking by carbonaceous deposits.