Oxychlorination of methane over FeOx/CeO2 catalysts

被引:0
作者
Jeongeun Kim
Youngseok Ryou
Gyohyun Hwang
Jungup Bang
Jongwook Jung
Yongju Bang
Do Heui Kim
机构
[1] Seoul National University,School of Chemical and Biological Engineering, Institute of Chemical Processes
[2] LG Chem R&D Campus Daejeon,Corporate R&D
[3] Ltd.,undefined
来源
Korean Journal of Chemical Engineering | 2018年 / 35卷
关键词
Methane; Oxychlorination; FeO; /CeO; Reducibility of Surface Cerium; Chloromethane;
D O I
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中图分类号
学科分类号
摘要
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 CO2 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 CO2. We investigated the effect of iron in FeOx/CO2 catalysts on methane oxychlorination. FeOx/CO2 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/CO2 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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页码:2185 / 2190
页数:5
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