Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system
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-
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 24:1; Conference: 177. national meeting of the American Chemical Society, Honolulu, HI, USA, 1 Apr 1979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rhodium complx catalyzed methanol carbonylation. Effects of medium and varius additives
Activation of the water molecule. V. Rhodium(I) hydride catalyzed water gas shift reaction. Identification of the elemental reactions comprising the catalytic cycles
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
08 HYDROGEN
HYDRIODIC ACID
CATALYTIC EFFECTS
RHODIUM
WATER GAS PROCESSES
CATALYSTS
CHEMICAL REACTION KINETICS
CARBON MONOXIDE
INFRARED SPECTRA
IODINE
KINETIC EQUATIONS
SHIFT PROCESSES
WATER
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EQUATIONS
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IODINE COMPOUNDS
KINETICS
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
SPECTRA
TRANSITION ELEMENTS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
080104 - Hydrogen- Production- Water Gas Processes