Dispersion of palladium on alumina surfaces

Journal Article · Sat Oct 15 00:00:00 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]

---

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), Vol. 31:8; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

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