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Issue 5, 2015
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An efficient robust fluorite CeZrO4−δ oxide catalyst for the eco-benign synthesis of styrene

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Abstract

In this work, we have reported CeO2, ZrO2, physically mixed (PH)-CeO2/ZrO2 and fluorite CeZrO4−δ oxides and their catalytic activities for the oxidative dehydrogenation (ODH) of ethyl benzene (EB) to styrene (ST) using molecular oxygen, air and carbon dioxide as oxidants. The catalysts were prepared by a gel-combustion method followed by calcination at 600 °C for 6 h and subjected to catalytic activity measurements. All the catalysts were characterized and studied by various physicochemical methods. The reaction parameters were varied systematically such as different catalysts, oxidants, temperatures, EB flow and oxidant flow. CeZrO4−δ accounted for a 47% styrene yield for 72 h without any significant deactivation under optimized reaction conditions. A thorough analysis of the spent catalysts demonstrated the robustness of the catalyst for this reaction under different oxidants and reaction conditions. Pristine CeO2 deactivated easily and the activity decreased with time on stream of the reaction.

Graphical abstract: An efficient robust fluorite CeZrO4−δ oxide catalyst for the eco-benign synthesis of styrene

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Article information


Submitted
14 Oct 2014
Accepted
02 Dec 2014
First published
02 Dec 2014

RSC Adv., 2015,5, 3619-3626
Article type
Paper
Author version available

An efficient robust fluorite CeZrO4−δ oxide catalyst for the eco-benign synthesis of styrene

K. Periyasamy, V. T. Aswathy, V. Ashok kumar, M. Manikandan, R. Shukla, A. K. Tyagi and T. Raja, RSC Adv., 2015, 5, 3619
DOI: 10.1039/C4RA12355G

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