Decomposition of isopropanol over MgO and CoO-MgO solid solutions

Journal Article · Thu Feb 01 00:00:00 EST 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(79)90102-7· OSTI ID:7051342

Pepe, F ^[1]; Stone, F S

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1. Univ. Roma

The pulsed reaction of isopropanol at 180/sup 0/-250/sup 0/C on magnesium oxide and on magnesium oxide containing 8 or 44 cobalt atoms per 100 magnesium atoms (MC8 and MC44) showed that the cobalt enhanced magnesium oxide's activity for the dehydrogenation to acetone without affecting the high dehydrogenation selectivity. A comparison of the activity of the three catalysts outgassed at 800/sup 0/C showed that the cobalt-containing catalysts had similar activities and were much more active than MgO, i.e., that MC8 had a higher activity per cobalt atom than MC44. Tests on catalysts outgassed at 440/sup 0/C and on water-treated catalysts suggested that some hydroxylation of the surface improved the dehydrogenation selectivity. The isopropanol is probably adsorbed dissociatively, with isopropoxide chemisorbed on coordinatively unsaturated cations and hydrogen adsorbed on anions. The cobalt ions probably provide coordinatively unsaturated surface cations, or strengthen the bond with adsorbed isopropoxide.

• OSTI ID: 7051342
• Journal Information: J. Catal.; (United States), Vol. 56:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
COMPARATIVE EVALUATIONS
COBALT
CATALYTIC EFFECTS
MAGNESIUM OXIDES
PROPANOLS
DECOMPOSITION
ISOMERS
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROXY COMPOUNDS
MAGNESIUM COMPOUNDS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENTS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)