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

Authors
DRISCOLL SA OZKAN US
Citation
Sa. Driscoll et Us. Ozkan, TRANSIENT ISOTROPIC LABELING USING (O2 O2)O-16-O-18 OVER ALKALI-METAL-PROMOTED MOLYBDATE CATALYSTS IN OXIDATIVE COUPLING OF METHANE/, Journal of physical chemistry, 97(44), 1993, pp. 11524-11529
Citations number
29
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
97
Issue
44
Year of publication
1993
Pages
11524 - 11529
Database
ISI
SICI code
0022-3654(1993)97:44<11524:TILU(O>2.0.ZU;2-H
Abstract
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 react ion 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.