Catalytic combustion over hexaaluminates

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:577525

Ramesh, K S; Kingsley, J J; Hubler, T L; McCready, D E; Cox, J L ^[1]

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1. Pacific Northwest National Lab., Richland, WA (United States)

Combustion is the oldest and most extensively used process for the production of light, heat, and energy utilization. Mankind has sought to control combustion since prehistoric times to more effectively utilize the combustible material, control the products of combustion, and harness the energy released during combustion. Catalysts provide the means to control the reactions of combustion beyond what can be achieved in the homogeneous gas phase (1). Catalysts also enable operation outside the range of flammability limits and control atmospheric pollutants of combustion, mainly NO{sub x}, carbon monoxide, and particles of incomplete combustion (soot). The major technical difficulty that has hindered widespread application of catalytic combustion devices is their poor performance, particularly durability of their ceramic substrates and catalytically active phases in the high temperature environment. Catalytic combustion of hydrocarbons over metals and metal oxide catalysts has been explored extensively. Recent reviews of materials for high temperature catalytic combustion have been provided by Marcus et al. (2) and Trim (3). Hexaaluminates which show good thermal stability above 1200{degrees}C are one class of metal oxides receiving consideration for application in high temperature combustion devices. Matsuda et al. (4) have developed thermally stable La-hexaaluminates with the same layer structure as Ba-hexaaluminate and have investigated their catalytic application. Machida et al. (5-7) have investigated the catalytic properties of a number of hexaaluminates of BaMAl{sub 11}O{sub 19-{alpha}}(M=Cr, Mn,Fe,Co,Ni). Here we report the synthesis, properties and catalytic combustion of some new hexaaluminates.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 577525
• Report Number(s): CONF-9604124--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
AIR POLLUTION CONTROL
ALUMINIUM OXIDES
CALCIUM OXIDES
CARBON MONOXIDE
CATALYTIC COMBUSTORS
CATALYTIC EFFECTS
CERIUM OXIDES
EXHAUST GASES
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
SURFACE AREA
SURFACE PROPERTIES
X-RAY DIFFRACTION