Oxidative coupling of methane using carbon dioxide in an electric field over La-ZrO₂ catalyst at low external temperature

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• 作者：Kazumasa Oshima ; Keisuke Tanaka ; Tomohiro Yabe ; Eiichi Kikuchi ; Yasushi Sekine ; ^{ysekine@waseda.jp}
• 关键词：Oxidative coupling of methane ; Carbon dioxide ; Electric field ; La&ndash ; ZrO2 catalyst
• 刊名：Fuel
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：107
• 期：Complete
• 页码：879-881
• 全文大小：152 K

文摘

Oxidative coupling of methane using carbon dioxide (CO₂-OCM) as an oxidant was conducted over several La- and Zr-based catalysts in an electric field at low external temperature of 423 K. Higher catalytic activity was obtained than in a conventional catalytic reaction over 10 mol % lanthanum-doped zirconia (La-ZrO₂) in the electric field. Although the catalytic activity for the CO₂-OCM was low over the La-ZrO₂ at 1173 K without the application of the electric field, the electric field promoted catalytic activity even at 423 K external temperature. We optimized the amount of doping-La in the La-ZrO₂ system, and characterized the effect of doping-La with XRD measurement. From these examinations, 5 mol % La-ZrO₂ catalyst showed the highest activity. High catalytic activity was provided by the synergistic effect of the La-cation, tetragonal-ZrO₂, and the electric field.