TRANSIENT ISOTROPIC LABELING USING (O2/O2)O-16-O-18 OVER ALKALI-METAL-PROMOTED MOLYBDATE CATALYSTS IN OXIDATIVE COUPLING OF METHANE

被引：13

作者：

DRISCOLL, SA ^{[1
]}

OZKAN, US ^{[1
]}

机构：

[1] OHIO STATE UNIV, DEPT CHEM ENGN, COLUMBUS, OH 43210 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 44期

关键词：

D O I：

10.1021/j100146a029

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：

The methane coupling reaction was investigated over MnMoO4 and alkali-metal (Li, Na, K)-promoted MnMoO4 at 700-degrees-C using isotopically labeled oxygen under both methane-free and oxygen/methane cofeed reaction conditions. The addition of K to MnMoO4 has previously been found to increase the selectivity to C2 hydrocarbons under methane coupling conditions.1 Results of the isotopic labeling studies performed under steady-state conditions indicated that the interaction of the catalyst surfaces with gas-phase oxygen and the mobility of subsurface lattice oxygen may play a significant role in determining the selectivity to C2 hydrocarbons.

引用

页码：11524 / 11529

页数：6

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