Partial oxidation of methane with nitrous oxide over V/sub 2/O/sub 5/-SiO/sub 2/ catalyst
Journal Article
·
· J. Catal.; (United States)
OSTI ID:6745339
The partial oxidation of methane to methanol and formaldehyde can be achieved selectively on silica-supported vanadium pentoxide catalysts in the temperature range 460-500/sup 0/C in a reactant mixture of CH/sub 4/, N/sub 2/O, and H/sub 2/O at 1 atm total pressure. The selectivity to CH/sub 3/OH and HCHO can be 100% at 460/sup 0/C at low conversions (approx.0.2%) and contact time (1.2 s), and decreases to produce more CO with increasing temperature, contact time, and conversion. The activation energies are 22 +/- 2, 40 +/- 4, and 47 +/- 4 kcal/mole for the production of HCHO, CH/sub 3/OH, and CO, respectively. The rate equations are Rate (CH/sub 3/OH) approx. (CH/sub 4/)/sup 1/2/(N/sub 2/O)/sup 1/2/(H/sub 2/O)/sup 1/2/, Rate (HCHO) approx. (CH/sub 4/)/sup 1/2/(N/sub 2/O)/sup 1/3/, and Rate (CO) approx. (CH/sub 4/)/sup 1/2/(N/sub 2/O)(H/sub 2/O)/sup -1/. The products form by parallel reaction paths which are different from the sequential oxidation mechanism of methane on molybdena and in a lower temperature range than on molybdenum oxide. 5 references, 6 figures, 1 tables.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6745339
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 94; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090110* -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
ALKANES
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
METHANE
MINERALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
10 SYNTHETIC FUELS
ALKANES
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
METHANE
MINERALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES