Oxidative methane dimerization by basic oxide catalysts

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5585444

McCarty, G; Quinlan, M A; Sancier, K M ^[1]

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1. Stanford Research Inst., Menlo Park, CA (USA)

The effect of reactant and product partial pressure on the methane activation kinetics was examined for a series of alkali-promoted alkaline earth oxide catalysts. In the limit of vanishing oxygen partial pressure the C/sub 2/ product selectivity becomes high and the ethene ethane ratio approaches zero. The kinetics are consistent with the competitive gas phase dimerization and the oxidation (both homogeneous and heterogeneous) of heterogeneously produced methyl radicals. Post-reaction temperature-programmed desorption, electron spin resonance measurements at elevated temperature, and isotope exchange experiments have provided additional cites about the mechanism of methane partial oxidation. Temperature-programmed desorption experiments following stationary-state oxidative dimerization of methane by Na-promoted CaO and Li-promoted MgO help describe a physical picture of the working catalysts.

• OSTI ID: 5585444
• Report Number(s): CONF-880348--
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ALKALINE EARTH METAL COMPOUNDS
ALKANES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CATALYSIS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DIMERIZATION
HYDROCARBONS
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTIAL OXIDATION PROCESSES
POLYMERIZATION
REACTION KINETICS
THERMOCHEMICAL PROCESSES