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Title: Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Monsanto Co.
OSTI Identifier:
7101445
Alternate Identifier(s):
OSTI ID: 7101445
Report Number(s):
CONF-790415-
Journal ID: CODEN: ACPCA
Resource Type:
Conference
Journal Name:
Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
Additional Journal Information:
Journal Volume: 24:1; Conference: 177. national meeting of the American Chemical Society, Honolulu, HI, USA, 1 Apr 1979
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, 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

Citation Formats

Singleton, T.C., Park, L.J., Price, J.L., and Forster, D. Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system. United States: N. p., 1979. Web.
Singleton, T.C., Park, L.J., Price, J.L., & Forster, D. Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system. United States.
Singleton, T.C., Park, L.J., Price, J.L., and Forster, D. Thu . "Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system". United States.
@article{osti_7101445,
title = {Water-gas shift reaction in the homogeneous rhodium-iodine catalyst system},
author = {Singleton, T.C. and Park, L.J. and Price, J.L. and Forster, D.},
abstractNote = {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.},
doi = {},
journal = {Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)},
number = ,
volume = 24:1,
place = {United States},
year = {1979},
month = {2}
}

Conference:
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