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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received May 29, 2018
Accepted July 26, 2018
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Oxychlorination of methane over FeOx/CeO2 catalysts

School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea 1Corporate R&D, LG Chem R&D Campus Daejeon, Ltd., 188 Munji-ro, Yuseong-gu, Daejeon 34122, Korea
dohkim@snu.ac.kr
Korean Journal of Chemical Engineering, November 2018, 35(11), 2185-2190(6), 10.1007/s11814-018-0135-4
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Abstract

Methane activation through oxychlorination is in the spotlight due to the relatively mild reaction conditions at atmospheric pressure and in the temperature range of 450-550 °C. Although CeO2 is known to exhibit good activity for methane oxychlorination, significant amounts of by-products such as CO2, CO and carbon deposits are produced during the reaction over CeO2. We investigated the effect of iron in FeOx/CeO2 catalysts on methane oxychlorination. FeOx/CeO2 with 3 wt% iron shows the maximum yield at 510 °C with 23% conversion of methane and 65% selectivity of chloromethane. XRD and H2 TPR results indicate that iron-cerium solid solution was formed, resulting in the production of more easily reduced cerium oxide and the suppression of catalysts sintering during the reaction. Furthermore, the selectivity of by-products decreased more significantly over FeOx/CeO2 than cerium oxide, which can be attributed to the facilitation of HCl oxidation arising from the enhanced reducibility of the former sample.

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