Abstract
As a result of hydrogen isotope separations which we have carried out on supports containing palladium, we believe that we can now make a double contribution, theoretical and experimental, to the work which has already been published in this field. From the fundamental point of view we have developed and studied the validity of a simple model, in our particular case of a separation coefficient {alpha} which is very different to unity. This model, which is of a counter-current isotopic exchange, neglects the longitudinal diffusion in the gas phase and the lateral diffusion in the adsorbed phase and only takes into account the surface resistance to exchange between the phases. It is therefore possible to estimate the efficiency of a chromatography column in terms of the height equivalent of a theoretical plate (HETP). The slight differences observed between the actual chromatograms and the simple model justify both the research undertaken into a more complex model taking into account the diffusion, and the adoption of a simple model for comparing the efficiency of several columns. We describe also a new and simple graphical method for deducing the number of theoretical plates of a column in chromatograms of the frontal and band
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Botter, F;
Menes, J;
Tistchenko, S;
Dirian, G
[1]
- Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Citation Formats
Botter, F, Menes, J, Tistchenko, S, and Dirian, G.
Frontal and band displacement chromatography of the hydrogen isotopes on palladium; Chromatographies frontale et de deplacement de bande des isotopes de l'hydrogene sur palladium.
France: N. p.,
1964.
Web.
Botter, F, Menes, J, Tistchenko, S, & Dirian, G.
Frontal and band displacement chromatography of the hydrogen isotopes on palladium; Chromatographies frontale et de deplacement de bande des isotopes de l'hydrogene sur palladium.
France.
Botter, F, Menes, J, Tistchenko, S, and Dirian, G.
1964.
"Frontal and band displacement chromatography of the hydrogen isotopes on palladium; Chromatographies frontale et de deplacement de bande des isotopes de l'hydrogene sur palladium."
France.
@misc{etde_20795904,
title = {Frontal and band displacement chromatography of the hydrogen isotopes on palladium; Chromatographies frontale et de deplacement de bande des isotopes de l'hydrogene sur palladium}
author = {Botter, F, Menes, J, Tistchenko, S, and Dirian, G}
abstractNote = {As a result of hydrogen isotope separations which we have carried out on supports containing palladium, we believe that we can now make a double contribution, theoretical and experimental, to the work which has already been published in this field. From the fundamental point of view we have developed and studied the validity of a simple model, in our particular case of a separation coefficient {alpha} which is very different to unity. This model, which is of a counter-current isotopic exchange, neglects the longitudinal diffusion in the gas phase and the lateral diffusion in the adsorbed phase and only takes into account the surface resistance to exchange between the phases. It is therefore possible to estimate the efficiency of a chromatography column in terms of the height equivalent of a theoretical plate (HETP). The slight differences observed between the actual chromatograms and the simple model justify both the research undertaken into a more complex model taking into account the diffusion, and the adoption of a simple model for comparing the efficiency of several columns. We describe also a new and simple graphical method for deducing the number of theoretical plates of a column in chromatograms of the frontal and band displacement types. Experimentally we give in particular the criteria for the validity of the model used, the law as a function of the {sup {alpha}}H{sub 2}-HD temperature, the study of the HETP as a function of the various parameters on several palladium containing supports, and the possibilities of an application to preparative chromatography. (authors) [French] Grace aux separations des isotopes de l'hydrogene que nous avons realisees sur masses palladiees, nous pensons apporter aux etudes precedemment publiees dans ce domaine, une double contribution, theorique et experimentale. Du point de vue fondamental, on a developpe et etudie la validite d'un modele simple, dans notre cas particulier d'un coefficient de separation {alpha} tres different de 1. Ce modele, celui d'un echange isotopique a contre courant, neglige les diffusions longitudinales en phase gazeuse et laterale en phase adsorbee et ne tient compte que de la resistance superficielle a l'echange entre phases. Il permet de chiffrer l'efficacite d'une colonne de chromatographie en hauteur equivalente a un plateau theorique (HEPT). Les ecarts legers observes entre les chromatogrammes reels et le modele simple justifient d'une part l'etude entreprise d'un modele plus elabore tenant compte des diffusions, d'autre part l'adoption du modele simple pour la comparaison de l'efficacite de plusieurs colonnes. Nous donnons egalement une methode graphique simple et nouvelle de deduire le nombre de plateaux theoriques d'une colonne des chromatogrammes de deplacement de bande et de frontales. Experimentalement, nous donnons essentiellement les criteres de validite du modele utilise, la loi en fonction de la temperature de {sup {alpha}}H{sub 2}-HD, l'etude de la HEPT en fonction de divers parametres sur plusieurs masses palladiees, et les possibilites de l'application a la chromatographie preparative. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}
title = {Frontal and band displacement chromatography of the hydrogen isotopes on palladium; Chromatographies frontale et de deplacement de bande des isotopes de l'hydrogene sur palladium}
author = {Botter, F, Menes, J, Tistchenko, S, and Dirian, G}
abstractNote = {As a result of hydrogen isotope separations which we have carried out on supports containing palladium, we believe that we can now make a double contribution, theoretical and experimental, to the work which has already been published in this field. From the fundamental point of view we have developed and studied the validity of a simple model, in our particular case of a separation coefficient {alpha} which is very different to unity. This model, which is of a counter-current isotopic exchange, neglects the longitudinal diffusion in the gas phase and the lateral diffusion in the adsorbed phase and only takes into account the surface resistance to exchange between the phases. It is therefore possible to estimate the efficiency of a chromatography column in terms of the height equivalent of a theoretical plate (HETP). The slight differences observed between the actual chromatograms and the simple model justify both the research undertaken into a more complex model taking into account the diffusion, and the adoption of a simple model for comparing the efficiency of several columns. We describe also a new and simple graphical method for deducing the number of theoretical plates of a column in chromatograms of the frontal and band displacement types. Experimentally we give in particular the criteria for the validity of the model used, the law as a function of the {sup {alpha}}H{sub 2}-HD temperature, the study of the HETP as a function of the various parameters on several palladium containing supports, and the possibilities of an application to preparative chromatography. (authors) [French] Grace aux separations des isotopes de l'hydrogene que nous avons realisees sur masses palladiees, nous pensons apporter aux etudes precedemment publiees dans ce domaine, une double contribution, theorique et experimentale. Du point de vue fondamental, on a developpe et etudie la validite d'un modele simple, dans notre cas particulier d'un coefficient de separation {alpha} tres different de 1. Ce modele, celui d'un echange isotopique a contre courant, neglige les diffusions longitudinales en phase gazeuse et laterale en phase adsorbee et ne tient compte que de la resistance superficielle a l'echange entre phases. Il permet de chiffrer l'efficacite d'une colonne de chromatographie en hauteur equivalente a un plateau theorique (HEPT). Les ecarts legers observes entre les chromatogrammes reels et le modele simple justifient d'une part l'etude entreprise d'un modele plus elabore tenant compte des diffusions, d'autre part l'adoption du modele simple pour la comparaison de l'efficacite de plusieurs colonnes. Nous donnons egalement une methode graphique simple et nouvelle de deduire le nombre de plateaux theoriques d'une colonne des chromatogrammes de deplacement de bande et de frontales. Experimentalement, nous donnons essentiellement les criteres de validite du modele utilise, la loi en fonction de la temperature de {sup {alpha}}H{sub 2}-HD, l'etude de la HEPT en fonction de divers parametres sur plusieurs masses palladiees, et les possibilites de l'application a la chromatographie preparative. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}