Dispersion of palladium on alumina surfaces

Journal Article · Sat Oct 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90536-3· OSTI ID:7163988

McCarty, J G; Chang, Y F ^[1]

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1. SRI International, Menlo Park, CA (United States). Materials Research Center

Catalytic burners for gas turbine power generation are nearing commercialization in engines with moderate inlet temperatures (< 1,600 K). Catalytic combustion of natural gas provides ultra low emissions with nitrogen oxides (NO[sub x]) levels below 1 ppm in the exhaust. The catalyst developed for these burners contain palladium oxide (PdO) dispersed over the surfaces of stabilized alumina supports. The catalyst operates at temperatures near the decomposition point of PdO, where the rate of combustion becomes nearly independent of temperature. The durability of the PdO catalyst requires a highly stable supporting oxide. It also depends on nucleation growth, and fragmentation of oxide films on palladium crystallites and on redispersing forces at PdO/alumina interfaces to counter sintering of PdO and Pd particles. In this work, the authors have used reproducible temperature and time transient kinetics of methane oxidation by PdO supported on sintered lanthanum hexaaluminate to provide information about the dispersion of PdO in the complex PdO/Pd/aluminate catalyst system.

• OSTI ID: 7163988
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:8; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BURNERS
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC COMBUSTORS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DISTRIBUTION
ENERGY SOURCES
ENGINES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS BURNERS
GAS FUELS
GAS TURBINE ENGINES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
NATURAL GAS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PALLADIUM COMPOUNDS
PALLADIUM OXIDES
REACTION KINETICS
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS