Published June 1957 | Version v1
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A study on the isotope effects in the reduction of carbon dioxide by zinc

Creators

  • 1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires

Description

We have determined the isotope effects which occur in the reduction of carbon dioxide by zinc. It has been shown that in the case of irreversible surface reactions, Bernstein's equation which permits the calculation of the fractionation factor is still valid. These experimental factors are in good agreement with those obtained by calculating the partition functions of the adsorbed activated complexes. In the reaction mechanism used, the model of the activated complex corresponds to the dissociation of one of the carbon oxygen bonds CO2 → CO + O. Perturbations arising from the slight reversibility of the reaction Zn + CO2 ↔ ZnO + CO on the isotope effects on the carbon and oxygen atoms have also been calculated. (author)

Availability note (English)

Available from INIS in electronic form

Abstract (French)

Nous avons etudie les effets isotopiques qui ont lieu dans la reduction du gaz carbonique par le zinc. La validite de l'equation de Bernstein qui permet de calculer le facteur de fractionnement a ete demontree pour le cas d'une reaction irreversible de surface. Ces facteurs de fractionnement experimentaux sont en bon accord avec ceux obtenus par le calcul des fonctions de partition isotopiques des complexes actives adsorbes. Dans le mecanisme de reaction utilise, le modele du complexe active correspond a la dissociation d'une des liaisons carbone oxygene CO2 → CO + O. Les effets perturbateurs de la reversibilite de la reduction Zn + CO2 ↔ ZnO + CO sur les effets isotopiques du carbone et ceux de l'oxygene ont ete egalement evalues. (auteur)

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Additional details

Additional titles

Original title (French)
Etude des effets isotopiques dans la reduction du gaz carbonique par le zinc

Publishing Information

Imprint Pagination
82 p.
Report number
CEA-R--726

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
38045533
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
ACTIVATION ENERGY; ADSORPTION; CARBON 12; CARBON 14; CARBON DIOXIDE; CHEMICAL REACTION KINETICS; CHEMISORPTION; COMPARATIVE EVALUATIONS; DATA COVARIANCES; DISSOCIATION ENERGY; HAMILTONIAN FUNCTION; INTEGRAL CALCULUS; IONIZATION CHAMBERS; ISOTOPE EFFECTS; ISOTOPIC EXCHANGE; KINETIC EQUATIONS; LABELLED COMPOUNDS; LCAO METHOD; MASS SPECTROMETERS; MOLECULAR ORBITAL METHOD; OXYGEN 18; PARTITION FUNCTIONS; POTENTIALS; REDUCTION; ROTATION-VIBRATION MODEL; SURFACE PROPERTIES; ZINC
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CALCULATION METHODS; CARBON COMPOUNDS; CARBON ISOTOPES; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; COLLECTIVE MODEL; ELEMENTS; ENERGY; EQUATIONS; EVALUATION; EVEN-EVEN NUCLEI; FUNCTIONS; ISOTOPES; KINETICS; LIGHT NUCLEI; MATHEMATICAL MODELS; MATHEMATICS; MEASURING INSTRUMENTS; METALS; NUCLEAR MODELS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; OXYGEN ISOTOPES; RADIATION DETECTORS; RADIOISOTOPES; REACTION KINETICS; SEPARATION PROCESSES; SORPTION; SPECTROMETERS; STABLE ISOTOPES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
44 refs.