PRETREATMENT EFFECTS ON THE ACTIVE-SITE FOR METHANE ACTIVATION IN THEOXIDATIVE COUPLING OF METHANE OVER MGO AND LI M-GO/

Authors
COULTER K SZANYI J GOODMAN DW
Citation
K. Coulter et al., PRETREATMENT EFFECTS ON THE ACTIVE-SITE FOR METHANE ACTIVATION IN THEOXIDATIVE COUPLING OF METHANE OVER MGO AND LI M-GO/, Catalysis letters, 35(1-2), 1995, pp. 23-32
Citations number
14
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
35
Issue
1-2
Year of publication
1995
Pages
23 - 32
Database
ISI
SICI code
1011-372X(1995)35:1-2<23:PEOTAF>2.0.ZU;2-Q
Abstract
The effects of high temperature pretreatments on the activity of MgO a nd Li/MgO catalysts for the oxidative coupling of methane have been st udied. The MgO powder catalyst exhibited a turnover frequency of 3.0 x 10(-3) molecules/site s, at 990 K, whereas the Li/MgO catalyst showed a turnover frequency of 7.0 x 10(-2) molecules/site s, under the same reaction conditions. The initial C-2 formation rate was observed to i ncrease with pretreatment temperature over the MgO catalyst, supportin g our previous proposal that F-type defects are responsible for methan e activation.