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学科主题: 物理化学
题名: Quinone mediated selective oxidation of methane over palladium
作者: An ZJ(安增建) ;  Pan XL(潘秀莲) ;  Liu XM(刘秀梅) ;  Han XW(韩秀文) ;  Bao XH(包信和)
会议名称: The 14th International Congress on Catalysis
会议日期: 2008-7-13
出版日期: 2008-07-13
会议地点: 韩国
通讯作者: 包信和
部门归属: 五室
主办者: 国际催化协会
摘要: Selectice oxidation of methane to methanol is industrial significance. Despite extensive efforts in the past decades, it is still a challenge in chemistry. Compared to high-temperature conversion, metal-catallyzed oxidation in liquid phase at low temperatures (<250)seems to be a more promising route, because it usually gives a higher selectivity(>85%). We found that quinines (Q) can be employed as efficient co-catalysts in the palladium catalyzed selective oxidation of methane to CF3COOCH3 by O2in CF3COOH. In a homogeneously catalyzed reaction an electron-transfer chain was built based on three redox couples, i.e. Pd2+/Pd0, Q/H2Q, and NO2/NO. Pd2+ was the catalyticallyactive center, oxidizing methane to CF3COOCH3 forming Pd0. The reduced Pd0 was regenerated to Pd2+ by Q giving H2Q. Then NO2 reacted with H2Q to form Q and NO, which was reoxidized to NO2 by O2. The turen over number (TON) based on Pd2+ was 0.7h-1. In a heterogeneously catalyzed reaction over carbon supported Pd(Pd/C) an even higher Ton of 86h-1 was obtained in the presence of tetrachloroquinone for the conversion of methane to CF3COOH3.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/112942
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
An ZJ,Pan XL,Liu XM,et al. Quinone mediated selective oxidation of methane over palladium[C]. 见:The 14th International Congress on Catalysis. 韩国. 2008-7-13.
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