Oxidation of methanol over chromium containing spinel (MgAl/sub y/Cr/sub x/O/sub 4/ where Y = 2 - x) and corundum (. cap alpha. -Al/sub y/Cr/sub x/O/sub 3/) solid solutions

Journal Article · Tue Apr 01 04:00:00 EST 1980 · J. Catal.; (United States)

OSTI ID:6462180

Awe, A A; Miliades, G; Vickerman, J C

The effect of the matrix on the oxidation activity of oxide catalysts was studied with 15 spinel catalysts of x = 0 to x = 2 composition and on 15 corundum catalysts of x = 0 to x = 2 composition. The spinel catalysts had higher activity and the corundum catalysts higher selectivity for partial oxidation in the oxidation of methanol with excess oxygen to carbon dioxide and formaldehyde. In both series, the catalytic activity and selectivity of catalysts containing < 10% chromium fluctuated sensitively as a function of surface composition; in this region, the active sites were electronically isolated The selectivity of the catalysts of > 10% chromium content, i.e., catalysts with mobile, averaged charges, apparently depended on the strength of oxygen, hydrogen, and methanol adsorption, which in turn depended on the matrix configuration; partial oxidation was favored by adsorption to the surface via the H atoms, but deep oxidation presupposed the presence of labile active surface oxygen and strong alcohol adsorption, probably via the oxygen atom.

• Research Organization: Univ. of Manchester
• OSTI ID: 6462180
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 62:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
400301* -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CORUNDUM
CRYSTAL STRUCTURE
DISPERSIONS
HYDROXY COMPOUNDS
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METHANOL
MINERALS
MIXTURES
ORGANIC COMPOUNDS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SOLID SOLUTIONS
SOLUTIONS
SPINELS
SURFACE PROPERTIES