Oxidative conversion of methane to higher hydrocarbons over alkali-promoted Mn/SiO/sub 2/

Journal Article · Sun Feb 01 04:00:00 EST 1987 · J. Catal.; (United States)

OSTI ID:5589061

Jones, C A; Leonard, J J; Sofranko, J A

Increased yields of higher hydrocarbons from methane over manganese oxide-silica obtained upon the addition of alkali metals and alkaline earths to the catalyst. Running redox cycles of alternating methane and air, a 15% manganese-5% sodium pyrophosphate-silica catalyst repeatedly gives a 17% yield of ethane, ethylene, and higher hydrocarbons (77% selectivity and 22% conversion) for 2 min at 850/sup 0/C and 860 GHSV. This represents an improvement of 40 absolute percent selectivity over the alkali-free catalyst. The improvement arises largely by suppression of product oxidation. Further evidence is described for a mechanism involving surface-initiated gas phase methyl radicals.

• Research Organization: ARCO Chemical Co., Newtown Square, PA
• OSTI ID: 5589061
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 103:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ALKALI METAL COMPOUNDS
ALKANES
ALKENES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
ENERGY SOURCES
ETHANE
ETHYLENE
FISCHER-TROPSCH SYNTHESIS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
KINETICS
MANGANESE COMPOUNDS
MANGANESE OXIDES
METHANE
MINERALS
NATURAL GAS
OPTIMIZATION
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PROMOTERS
PYROPHOSPHATES
REACTION KINETICS
REFORMER PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YIELDS