Structural changes in a Cu/Al sub 2 O sub 3 catalyst when used for oxidation of carbon monoxide

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90033-Z· OSTI ID:5636357

Laine, J; Severino, F ^[1]; Lopez-Agudo, A; Fierro, J L.G. ^[2]

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1. Instituto Venezolano de Investigaciones Cientificas, Caracas (Venezuela)
2. CSIC, Madrid (Spain)

It has been found when copper is deposited on high surface area alumina using loadings below about 4 wt% Cu and calcined below 773 K that a surface spinel CuAl{sub 2}O{sub 4} forms, in which most of the Cu{sup 2+} is located in a distorted octahedral geometry. Previous results have indicated that, for such loadings, the most active catalysts for CO oxidation at 473 K are obtained by prereduction with pure CO; however, the initial active state was found to be affected by a significant deactivation. The present study was undertaken to elucidate the structural changes accompanying deactivation during CO oxidation.

• OSTI ID: 5636357
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 129:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ALUMINATES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCINATION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER
COPPER COMPOUNDS
CRYSTAL STRUCTURE
DEACTIVATION
DECOMPOSITION
DEPOSITION
ELEMENTS
METALS
MICROSTRUCTURE
MORPHOLOGICAL CHANGES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS