CONVERSION OF METHANE WITH CARBON-DIOXIDE INTO C-2 HYDROCARBONS OVER METAL-OXIDES

被引:63
作者
ASAMI, K
FUJITA, T
KUSAKABE, K
NISHIYAMA, Y
OHTSUKA, Y
机构
[1] Research Center for Carbonaceous Resources, Institute for Chemical Reaction Science, Tohoku University, Aoba-ku, Sendai
关键词
CARBON DIOXIDE; C-2; HYDROCARBONS; METHANE; METAL OXIDE;
D O I
10.1016/0926-860X(95)00042-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Conversion of methane with carbon dioxide has been performed over seventeen metal oxides using a flow reaction system at 1123 K. The conversion ratio of carbon dioxide to methane is approximately two in most cases, Ethane and ethene (C-2 hydrocarbons) are formed over many oxides, and C-2 yield is higher over yttrium and manganese oxides. Rare earth catalysts such as yttrium, lanthanum, and samarium show higher C-2 selectivities of about 30%. C-2 selectivity is almost unchanged over yttrium and zirconium oxides during reaction while it decreases over samarium oxide. X-ray diffraction analysis reveals that some oxides such as manganese and iron oxides are reduced during reaction. The reaction mechanism for C-2 formation is discussed in terms of both adsorbed oxygen species dissociated from carbon dioxide and the lattice oxygen in metal oxides.
引用
收藏
页码:245 / 255
页数:11
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