Sa. Driscoll et al., TRANSIENT ISOTOPIC LABELING STUDIES USING (CH4)-C-12 (CH4)-C-13 OVER ALKALI-PROMOTED MOLYBDATE CATALYSTS IN THE OXIDATIVE COUPLING OF METHANE/, Catalysis letters, 25(3-4), 1994, pp. 191-199
The methane coupling reaction was investigated over MnMoO4 and alkali
(Li, Na, K)-promoted MnMoO4 at 700-degrees-C using (CH4)-C-12/(CH4)-C-
13 transient isotopic labeling experiments under steady-state reaction
conditions. The variations observed in the surface residence times of
CH4, CO, and CO2, ethane and ethylene were used to help explain selec
tivity differences previously reported in the oxidative coupling of me
thane over alkali-promoted molybdate catalysts.