skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Poisoning by carbon monoxide in the hydrogen exchange reaction between deuterium gas and water preadsorbed on a platinum--alumina catalyst

Abstract

Poisoning by carbon monoxide in the exchange reaction between deuterium and the water preadsorbed on a platinum--alumina catalyst was studied, by measuring not only the rate of reaction but also its kinetic behavior and the adsorption of reactants on the catalyst surface. The shape of the poisoning curve is closely associated with the kinetic behavior and exhibited an abrupt change on freezing the adsorbed water below 273/sup 0/K. When the rate is proportional to deuterium pressure and independent of the amount of water adsorbed, the exchange rate dropped sharply by carbon monoxide adsorbed of a few percent coverage without any marked changes in the amount and the rate of hydrogen adsorption on the platinum surface. However, at temperatures lower than 273/sup 0/K and at higher deuterium pressures, the rate depends not on the deuterium pressure but on the amount of water adsorbed. The migration of hydrogen in or through the adsorbed water is seemingly sufficiently suppressed by freezing to control the overall reaction rate. In this case, a small amount of adsorption of carbon monoxide did not show any toxicity, but then a steep poisoning started accompanying a change in the kinetic behavior. It was accordingly demonstrated that the mechanismmore » of the reaction may be better understood by studying poisoning and measuring adsorption, overall rate, and kinetic behavior.« less

Authors:
 [1];
  1. (Sagami Chemical Research Center, Sagamihara, Kanagawa, Japan)
Publication Date:
OSTI Identifier:
6299404
Resource Type:
Journal Article
Journal Name:
J. Catal.; (United States)
Additional Journal Information:
Journal Volume: 56:2
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DEUTERIUM; ISOTOPIC EXCHANGE; PLATINUM; CATALYTIC EFFECTS; ADSORPTION; ALUMINIUM OXIDES; CARBON MONOXIDE; CATALYST SUPPORTS; CATALYSTS; CHEMICAL REACTION KINETICS; CHEMICAL REACTIONS; EXPERIMENTAL DATA; ISOLATED VALUES; ISOTOPE EFFECTS; LOW PRESSURE; MEDIUM TEMPERATURE; POISONING; PRESSURE DEPENDENCE; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; WATER; ALUMINIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DATA; DATA FORMS; ELEMENTS; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; INFORMATION; ISOTOPES; KINETICS; LIGHT NUCLEI; MECHANICAL STRUCTURES; METALS; NUCLEI; NUMERICAL DATA; ODD-ODD NUCLEI; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; REACTION KINETICS; SORPTION; STABLE ISOTOPES; SUPPORTS; TRANSITION ELEMENTS; 400203* - Isotope Exchange & Isotope Separation- (-1987); 400202 - Isotope Effects, Isotope Exchange, & Isotope Separation

Citation Formats

Iida, I., and Tamaru, K. Poisoning by carbon monoxide in the hydrogen exchange reaction between deuterium gas and water preadsorbed on a platinum--alumina catalyst. United States: N. p., 1979. Web. doi:10.1016/0021-9517(79)90109-X.
Iida, I., & Tamaru, K. Poisoning by carbon monoxide in the hydrogen exchange reaction between deuterium gas and water preadsorbed on a platinum--alumina catalyst. United States. doi:10.1016/0021-9517(79)90109-X.
Iida, I., and Tamaru, K. Thu . "Poisoning by carbon monoxide in the hydrogen exchange reaction between deuterium gas and water preadsorbed on a platinum--alumina catalyst". United States. doi:10.1016/0021-9517(79)90109-X.
@article{osti_6299404,
title = {Poisoning by carbon monoxide in the hydrogen exchange reaction between deuterium gas and water preadsorbed on a platinum--alumina catalyst},
author = {Iida, I. and Tamaru, K.},
abstractNote = {Poisoning by carbon monoxide in the exchange reaction between deuterium and the water preadsorbed on a platinum--alumina catalyst was studied, by measuring not only the rate of reaction but also its kinetic behavior and the adsorption of reactants on the catalyst surface. The shape of the poisoning curve is closely associated with the kinetic behavior and exhibited an abrupt change on freezing the adsorbed water below 273/sup 0/K. When the rate is proportional to deuterium pressure and independent of the amount of water adsorbed, the exchange rate dropped sharply by carbon monoxide adsorbed of a few percent coverage without any marked changes in the amount and the rate of hydrogen adsorption on the platinum surface. However, at temperatures lower than 273/sup 0/K and at higher deuterium pressures, the rate depends not on the deuterium pressure but on the amount of water adsorbed. The migration of hydrogen in or through the adsorbed water is seemingly sufficiently suppressed by freezing to control the overall reaction rate. In this case, a small amount of adsorption of carbon monoxide did not show any toxicity, but then a steep poisoning started accompanying a change in the kinetic behavior. It was accordingly demonstrated that the mechanism of the reaction may be better understood by studying poisoning and measuring adsorption, overall rate, and kinetic behavior.},
doi = {10.1016/0021-9517(79)90109-X},
journal = {J. Catal.; (United States)},
number = ,
volume = 56:2,
place = {United States},
year = {1979},
month = {2}
}