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Exchange reaction between hydrogen and deuterium. II - Proposal for an heterogeneous initiation mechanism of gaseous phase reactions

Journal Article:

Abstract

Investigation of experimental data related to evolution period exhibited by H/sub 2/-D/sub 2/ exchange process requires to take into account the variation against time of every atomic species -adsorbed or not- implied in the reaction mechanism. The formation of first chain carriers involves: - chemisorption of either gaseous reactant on the surface active centres (..sigma..), e.g.: ..sigma.. + 1/2 H/sub 2/ reversible ..sigma..H; - consecutive generation of atomic species through hetero-homogeneous transfer between chemisorbed species (..sigma..H) and gaseous molecules: ..sigma..H+H/sub 2/..--> sigma..+H/sub 2/+H/sup 0/, ..sigma..H+D/sub 2/..--> sigma..+HD+D/sup 0/. Therefore, it can be shown that the heterogeneous initiation process of a gas phase reaction identifies to a chain linear mechanism. Such an heterogeneous sequence conditions the further proceeding of the homogeneous chain reaction; both evolutions being kinematically connected. Rate constant of hydrogen adsorption on silica glass: ksub(a1) approximately 10/sup 14/ exp(-47/RT)Isup(0,5).molesup(-0,5).S/sup -1/ has been evaluated.
Authors:
Marteau, Chantal; Gaillard-Cusin, Francoise; James, Henri [1] 
  1. Centre National de la Recherche Scientifique, 45 - Orleans-la-Source (France). Centre de Recherches sur la Chimie de Combustion et des Hautes Temperatures
Publication Date:
May 01, 1978
Product Type:
Journal Article
Reference Number:
AIX-10-462720; EDB-79-132078
Resource Relation:
Journal Name: J. Chim. Phys.; (France); Journal Volume: 75:5
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DEUTERIUM; ISOTOPIC EXCHANGE; CATALYSIS; CHEMISORPTION; GASES; REACTION KINETICS; CHEMICAL REACTIONS; FLUIDS; HYDROGEN ISOTOPES; ISOTOPES; KINETICS; LIGHT NUCLEI; NUCLEI; ODD-ODD NUCLEI; SEPARATION PROCESSES; SORPTION; STABLE ISOTOPES; 400203* - Isotope Exchange & Isotope Separation- (-1987)
OSTI ID:
5917262
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Journal ID: CODEN: JCPBA
Submitting Site:
INIS
Size:
Pages: 498-504
Announcement Date:

Journal Article:

Citation Formats

Marteau, Chantal, Gaillard-Cusin, Francoise, and James, Henri. Exchange reaction between hydrogen and deuterium. II - Proposal for an heterogeneous initiation mechanism of gaseous phase reactions. France: N. p., 1978. Web.
Marteau, Chantal, Gaillard-Cusin, Francoise, & James, Henri. Exchange reaction between hydrogen and deuterium. II - Proposal for an heterogeneous initiation mechanism of gaseous phase reactions. France.
Marteau, Chantal, Gaillard-Cusin, Francoise, and James, Henri. 1978. "Exchange reaction between hydrogen and deuterium. II - Proposal for an heterogeneous initiation mechanism of gaseous phase reactions." France.
@misc{etde_5917262,
title = {Exchange reaction between hydrogen and deuterium. II - Proposal for an heterogeneous initiation mechanism of gaseous phase reactions}
author = {Marteau, Chantal, Gaillard-Cusin, Francoise, and James, Henri}
abstractNote = {Investigation of experimental data related to evolution period exhibited by H/sub 2/-D/sub 2/ exchange process requires to take into account the variation against time of every atomic species -adsorbed or not- implied in the reaction mechanism. The formation of first chain carriers involves: - chemisorption of either gaseous reactant on the surface active centres (..sigma..), e.g.: ..sigma.. + 1/2 H/sub 2/ reversible ..sigma..H; - consecutive generation of atomic species through hetero-homogeneous transfer between chemisorbed species (..sigma..H) and gaseous molecules: ..sigma..H+H/sub 2/..--> sigma..+H/sub 2/+H/sup 0/, ..sigma..H+D/sub 2/..--> sigma..+HD+D/sup 0/. Therefore, it can be shown that the heterogeneous initiation process of a gas phase reaction identifies to a chain linear mechanism. Such an heterogeneous sequence conditions the further proceeding of the homogeneous chain reaction; both evolutions being kinematically connected. Rate constant of hydrogen adsorption on silica glass: ksub(a1) approximately 10/sup 14/ exp(-47/RT)Isup(0,5).molesup(-0,5).S/sup -1/ has been evaluated.}
journal = {J. Chim. Phys.; (France)}
volume = {75:5}
journal type = {AC}
place = {France}
year = {1978}
month = {May}
}