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 00:00:00 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), Vol. 62:2
• Country of Publication: United States
• Language: English

Related Subjects

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