Decomposition of isopropanol over spinel solid solutions MgAl/sub y/Cr/sub x/O/sub 4/

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

OSTI ID:6456326

Odumah, E I; Vickerman, J C

The decomposition of isopropanol over spinal solid solutions MgAl/sub y/Cr/sub x/O/sub 4/, where y = 2 - x, was studied to elucidate the importance of matrix and electronic effects in oxide catalysis. The activities and dehydration and dehydrogenation selectivities were similar to those of chromium/aluminum corundum solid solutions The activity went through a minimum at x = 0.4. The dehydration activity was high at very low and very high chromium contents, and the selectivity for dehydrogenation was high at 5-75% chromium content. The active sites at x < 0.4 were probably electronically isolated, and catalysts with x > 4 had charge mobility. The dehydration to propylene probably occurred on single sites, at low chromium contents on coordinatively unsaturated cations forming strong Lewis acids. Dehydrogenation to acetone occurred on pair sites.

• Research Organization: Univ. of Manchester
• OSTI ID: 6456326
• 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
400301* -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ACETONE
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
KETONES
KINETICS
LEWIS ACIDS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MINERALS
MIXTURES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROPANOLS
PROPYLENE
REACTION KINETICS
SOLID SOLUTIONS
SOLUTIONS
SPINELS
YIELDS