Isotopic evidence for direct methyl coupling and ethane to ethylene conversion during partial oxidation of methane over Li/MgO
The products of the reaction of a CH/sub 4//CD/sub 4/O/sub 2/ mixture over a Li-promoted MgO (Li/MgO) catalyst at 750/degrees/C have been determined by mass spectrometry and high-resolution Fourier transform infrared spectroscopy. Under these conditions there was no significant hydrogen exchange between CH/sub 4/ and CD/sub 4/. C/sub 2/H/sub 6/, CD/sub 3/CH/sub 3/, and C/sub 2/D/sub 6/ were the only ethanes detected, and C/sub 2/H/sub 4/, CD/sub 2/CH/sub 2/, and C/sub 2/D/sub 4/ were the only ethylenes. The relative concentrations of the hydrocarbon products could be predicted on the basis of the relative concentrations of CH/sub 3/ and CD/sub 3/ determined by the kinetic isotope effect. The results suggest that the reaction proceeds almost exclusively by gas-phase methyl coupling and that ethylene is produced by gas-phase conversion of ethane.
- Research Organization:
- CSIRO, New South Wales (Australia)
- OSTI ID:
- 6085136
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 92:22
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
10 SYNTHETIC FUELS
DEUTERIUM COMPOUNDS
OXIDATION
METHANE
ABSORPTION SPECTROSCOPY
ETHANE
ETHYLENE
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
HIGH TEMPERATURE
INFRARED RADIATION
LITHIUM
MAGNESIUM OXIDES
MASS SPECTROSCOPY
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALKENES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
MAGNESIUM COMPOUNDS
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SPECTROMETERS
SPECTROSCOPY
400201* - Chemical & Physicochemical Properties
090100 - Hydrocarbon Fuels- (-1989)