Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system
Conference
·
· Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
OSTI ID:7101445
Carbon monoxide and water were converted to hydrogen and carbon dioxide at 175/sup 0/ or 185/sup 0/C, 200-400 psig, 3-23 M water concentration, 0.01 or 0.005 M rhodium concentration, and 0.1-0.9 M hydrogen iodide concentration. A complex interaction occurred between hydrogen iodide and the water concentrations. The reaction apparently took place by a combination of oxidation of an anionic monovalent rhodium(I) carbonyl iodide complex to one of four different rhodium(III) complexes, depending on reaction conditions, and reduction back to the monovalent form. In IR studies, the monovalent anion predominated at low hydrogen iodide and high water concentrations; the trivalent trans-tetraiododicarbonyl rhodate anion, at the opposite concentrations. A rate equation was derived on the assumption that the effective acid concentration was the controlling step of the reaction, which was first order in rhodium concentration.
- Research Organization:
- Monsanto Co.
- OSTI ID:
- 7101445
- Report Number(s):
- CONF-790415-
- Conference Information:
- Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 24:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
080104 -- Hydrogen-- Production-- Water Gas Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELEMENTS
EQUATIONS
HALOGEN COMPOUNDS
HALOGENS
HYDRIODIC ACID
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
IODINE
IODINE COMPOUNDS
KINETIC EQUATIONS
KINETICS
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
RHODIUM
SHIFT PROCESSES
SPECTRA
TRANSITION ELEMENTS
WATER
WATER GAS PROCESSES
080104 -- Hydrogen-- Production-- Water Gas Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELEMENTS
EQUATIONS
HALOGEN COMPOUNDS
HALOGENS
HYDRIODIC ACID
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
IODINE
IODINE COMPOUNDS
KINETIC EQUATIONS
KINETICS
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
RHODIUM
SHIFT PROCESSES
SPECTRA
TRANSITION ELEMENTS
WATER
WATER GAS PROCESSES