Selective formation of methanol from synthesis gas over palladium catalysts
Journal Article
·
· J. Catal.; (United States)
Hydrogenation of carbon monoxide over supported Pd catalysts gave methanol in high selectivity at 260 to 350/sup 0/C and 150 to 16,000 psig of pressure. Methanation became significant only outside the temperature--pressure regime for which methanol formation is thermodynamically favorable. The behavior of Pt and Ir appears similar although fewer data have been gathered. The catalytic behavior of these three noble metals toward synthesis gas is thus not only different from that commonly thought but also sharply contrasted with that of the other Group VIII metals for which ultimate C-O bond hydrogenolysis and hydrocarbon formation are a dominating feature. Silica-supported Pd was directly compared with Ni at 314/sup 0/C and 12.25 atm of CO:H/sub 2/ (30:70); Pd not only gave methanol formation rather than the methanation observed for Ni but also much less chain growth activity than Ni. It is suggested that these differences in catalytic performance may be related to the inability of Pd (and Pt and Ir as well) to chemisorb CO dissociatively at reaction temperatures, compared to other Group VIII metals.
- Research Organization:
- Union Carbide Corp., Tarrytown, NY
- OSTI ID:
- 5046540
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 52:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090221* -- Alcohol Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
GASES
HIGH TEMPERATURE
HYDROGEN
HYDROXY COMPOUNDS
IRIDIUM
MEDIUM PRESSURE
METALS
METHANATION
METHANOL
NICKEL
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REFRACTORY METALS
SYNTHESIS
SYNTHESIS GAS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
VERY HIGH PRESSURE
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
GASES
HIGH TEMPERATURE
HYDROGEN
HYDROXY COMPOUNDS
IRIDIUM
MEDIUM PRESSURE
METALS
METHANATION
METHANOL
NICKEL
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REFRACTORY METALS
SYNTHESIS
SYNTHESIS GAS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
VERY HIGH PRESSURE