化学
甲烷氧化偶联
甲烷
红外光谱学
傅里叶变换红外光谱
催化作用
红外线的
氧化磷酸化
光谱学
化学工程
无机化学
有机化学
光学
工程类
物理
量子力学
生物化学
作者
Tiep LeVan,M. Che,Jean‐Michel Tatibouët,M. Kermarec
标识
DOI:10.1006/jcat.1993.1185
摘要
The formation and stability of La2O2CO2 under CO2/He and the CH4/O2/He reaction mixture were investigated by infrared spectroscopy in the 650-750°C range. La2O2CO3 is not stable under flowing He at 650°C. Bulk La2O2CO3 is formed during the oxidative coupling of CH4 at 650°C, although thermodynamic considerations predict that it cannot be generated from the gaseous CO2 produced by the catalytic reaction. On this basis, it is suggested that the dioxymonocarbonate is formed via the surface deep oxidation of CH4 and/or the reaction products. FTIR spectroscopy indicates that 15% of the starting catalyst La2O3 is transformed into La2O2CO3 by the catalytic reaction at 650°C.
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