Process of polarization and analysis of the water adsorption on a zeolite |
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| Authors: | G Chabanis V Mouton A Abdoulaye J C Giuntini J V Zanchetta J Vanderschueren |
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| Institution: | (1) Lab. de Physicochimie des Matériaux Solides (URA D0407-CNRS) Equipe de Chimie-Physique, Université Montpellier II, Place Eugène Bataillon, F 34095 Montpellier Cedex 5, France;(2) Laboratoire de Chimie Macromoléculaire et Chimie-Physique Groupe d'étude des polymères industriels et de dosimétrie appliquée B6, Institut de Chimie au Sart-Tilman, B 4000 Liège, Belgique |
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| Abstract: | We report the study of the dielectric relaxation mechanisms in the zeolite Na-X, “Faujasite”, by means of the method of Thermally
Stimulated Depolarization Currents (TSDC), and polarization conductivity versus frequency. We give particular interest to
the effect of adsorption on the evolution of dielectric parameters. Two distinct relaxation processes attributed to adsorbed
water were found by TSDC measurements. Moreover, the polarization conductivity gives two sets of values of the potential barrier
height. The evolution of the polarization conductivity as a function of the rate p/p° is comparable to the curve showing the
isothermal water adsorption.
Paper presented at the 1st Euroconference on Solid State Ionics, Zakynthos, Greece, 11–18 Sept. 1994 |
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