The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X

 

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dc.contributor.advisor Coetzer, J en_ZA
dc.contributor.author Swart, Stephen en_ZA
dc.date.accessioned 2016-02-15T07:15:49Z
dc.date.available 2016-02-15T07:15:49Z
dc.date.issued 1984 en_ZA
dc.identifier.citation Swart, S. 1984. The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/17040
dc.description Bibliography: pages 96-102. en_ZA
dc.description.abstract Zeolite 13X was synthesized in the sodium form. Some transition metal cations were introduced into the zeolite framework by ion exchange reactions. These different cationic zeolite forms were doped or impregnated with sodium metal, utilizing the adsorptive properties of the zeolite. An A.C. technique was used to determine the electrical conductivity of the dehydrated ion exchanged zeolites and the sodium impregnated zeolite samples as a function of temperature. The conductivity value obtained was used to determine some thermodynamic parameters relating to the conduction process. For the dehydrated ion exchanged zeolites the electrical conductivity showed a general decrease with a decreasing ion exchange capacity. The sodium impregnated zeolites showed an increase in conductivity with respect to the dehydrated unimpregnated samples. This was attributed to the presence of Na₆⁵+ centres in the impregnated zeolites. The reduction of some of the metal cations by the sodium on impregnation did not appear to have any significant effect on the overall ionic conductivity of the samples. The conductivity as a function of temperature and pressure for the dehydrated sodium form of zeolite 13X and its impregnated counterpart was determined. The conductivity was found to increase with increasing pressure and temperature. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Chemistry en_ZA
dc.title The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Chemistry en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Swart, S. (1984). <i>The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/17040 en_ZA
dc.identifier.chicagocitation Swart, Stephen. <i>"The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1984. http://hdl.handle.net/11427/17040 en_ZA
dc.identifier.vancouvercitation Swart S. The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1984 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17040 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Swart, Stephen AB - Zeolite 13X was synthesized in the sodium form. Some transition metal cations were introduced into the zeolite framework by ion exchange reactions. These different cationic zeolite forms were doped or impregnated with sodium metal, utilizing the adsorptive properties of the zeolite. An A.C. technique was used to determine the electrical conductivity of the dehydrated ion exchanged zeolites and the sodium impregnated zeolite samples as a function of temperature. The conductivity value obtained was used to determine some thermodynamic parameters relating to the conduction process. For the dehydrated ion exchanged zeolites the electrical conductivity showed a general decrease with a decreasing ion exchange capacity. The sodium impregnated zeolites showed an increase in conductivity with respect to the dehydrated unimpregnated samples. This was attributed to the presence of Na₆⁵+ centres in the impregnated zeolites. The reduction of some of the metal cations by the sodium on impregnation did not appear to have any significant effect on the overall ionic conductivity of the samples. The conductivity as a function of temperature and pressure for the dehydrated sodium form of zeolite 13X and its impregnated counterpart was determined. The conductivity was found to increase with increasing pressure and temperature. DA - 1984 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1984 T1 - The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X TI - The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X UR - http://hdl.handle.net/11427/17040 ER - en_ZA


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