Basic research on natural gas combustion phenomena - catalytic combustion. Annual report 1987. Report for 15 January 1987-14 January 1988
The intrinsic methane combustion activity of a series of metal oxide catalysts representing several structural classes was determined by temperature-programmed reaction and stationary-state order of reaction experiments. The oxide catalysts examined thus far include: (1) a series of lanthanum-based transition metal 1,1-perovskites; (2) a layered perovskite, La/sub 2/NiO/sub 4/; (3) YBa/sub 2/Cu/sub 3/O/sub 7/, the superconducting perovskite; (4) several alumina spinels; and (5) simple binary oxides of disparate structure. These metal oxide catalysts were typically prepared by conventional precipitation and calcination methods and characterized by x-ray diffraction, BET surface area, and the temperature-programmed evolution of oxygen. When normalized for surface area, the specific methane combustion activity of transition metal oxides correlates inversely with their thermochemical stability. The performance of the oxide catalysts was greatly influenced by sintering at elevated temperatures. The most-stable oxide was the lanthanum-alumina perovskite, LaAlO/sub 3/, which was stable up to 1473 K. The kinetics of catalytic methane combustion were examined in detail for selected catalysts.
- Research Organization:
- SRI International, Menlo Park, CA (USA)
- OSTI ID:
- 6915281
- Report Number(s):
- PB-88-214606/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
034000* -- Natural Gas-- Combustion
ALKANES
CATALYSTS
CATALYTIC COMBUSTORS
CHEMICAL REACTIONS
COHERENT SCATTERING
COMBUSTION
COMBUSTORS
DIFFRACTION
DOCUMENT TYPES
ENERGY SOURCES
FABRICATION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
KINETICS
LANTHANUM COMPOUNDS
METHANE
NATURAL GAS
ORGANIC COMPOUNDS
OXIDATION
PEROVSKITES
PROGRESS REPORT
RARE EARTH COMPOUNDS
REACTION KINETICS
RESEARCH PROGRAMS
SCATTERING
SINTERING
THERMOCHEMICAL PROCESSES
X-RAY DIFFRACTION