Direct alcohol synthesis reactions on cobalt modified methanol catalysts. Technical progress report

Technical Report · Mon Jun 30 00:00:00 EDT 1986

OSTI ID:5282691

We are studying the adsorption and reaction properties of Cu-ZnO, Co-ZnO and Co-Cu-ZnO catalysts intended for the direct synthesis of methanol and higher alcohols from CO:H/sub 2/ mixtures. Our principal goals are: (1) to understand the adsorption behavior of highly dispersed metals in ZnO-based catalysts; and (2) to determine the importance of these adsorption sites in alcohol synthesis reactions. Results obtained during the first year for the binary Cu-ZnO systems indicate that for sub-monolayer coverages of Cu (e.g., less than 10/sup 15/ Cu atoms/m/sup 2/ of ZnO), the Cu species are present in an electron deficient (i.e., partially oxidized) metallic state. The methoxy and formate intermediates produced during methanol decomposition are both more stable on these supported Cu surfaces than on bulk Cu. These Cu species are also quite active for CH/sub 2/O hydrogenation, which indicates that the rate limiting step in methanol synthesis is instead the hydrogenation of the formate intermediate. Work is in progress to determine whether CU maintains this electron deficient state under alcohol synthesis conditions, and whether a similar state also occurs for CO supported on ZnO. 17 refs.

• Research Organization: Minnesota Univ., Minneapolis (USA)
• DOE Contract Number: FG02-85ER13392
• OSTI ID: 5282691
• Report Number(s): DOE/ER/13392-1; ON: DE86014812
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON MONOXIDE
METHANATION
CATALYSTS
PERFORMANCE
COBALT
CATALYTIC EFFECTS
COPPER
METHANOL
SYNTHESIS
ZINC OXIDES
CATALYSIS
CHEMICAL REACTION KINETICS
FORMALDEHYDE
HYDROGENATION
REACTION INTERMEDIATES
ALCOHOLS
ALDEHYDES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROXY COMPOUNDS
KINETICS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
TRANSITION ELEMENTS
ZINC COMPOUNDS
400201* - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)