Design and characterization of zeolite-supported cobalt carbonyl catalysts

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6930087

Connaway, M C

Transition metal compounds such as Co/sub 2/(CO)/sub 8/ have often been used to catalyze various organic reactions. Severe difficulties may be encountered when attempts are made to recover and separate the soluble catalysts. A heterogeneous system consisting of Co/sub 2/(CO)/sub 8/ impregnated on zeolites with faujasitic structure has been designed and investigated using a variety of techniques. In situ FTIR spectroscopy and carbon monoxide evolution were used to identify the major products generated, namely Co/sub 4/(CO)/sub 12/ and Co(CO)/sub 4//sup -/. Disproportionation may be induced thus forming Co(CO)/sub 4//sup -/ and an associated cation from the supported subcarbonyls by addition of various ligands such as methanol. The location of the supported cobalt carbonyls is determined by their reactivity toward various phosphines with various kinetic diameters. The materials prepared in this manner were found to be active in catalyzing the methanol carbonylation reaction and following thermolysis were also found to be active Fischer-Tropsch catalysts. Major products observed in the carbonylation of methanol were methyl acetate and an acetaldehyde dimethyl acetal. The supported cobalt catalyst displays greater activity than Co/sub 2/(CO)/sub 8/ in solution for the carbonylation reaction when conducted under similar conditions. In the Fischer-Tropsch process, selectivity is seen for the production of linear, short-chain hydrocarbons.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg (USA)
• OSTI ID: 6930087
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CARBONYLATION
CATALYSIS
CARBONYLS
CATALYTIC EFFECTS
COBALT COMPOUNDS
FISCHER-TROPSCH SYNTHESIS
METHANOL
CATALYST SUPPORTS
ZEOLITES
ALCOHOLS
CHEMICAL REACTIONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
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