Gas-solid chromatographic studies of two well-known catalysts

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dc.contributor.advisorIrving, H M N Hen_ZA
dc.contributor.advisorKoch, Klaus Ren_ZA
dc.contributor.authorMason, Robert Peteren_ZA
dc.date.accessioned2016-10-19T03:58:03Z
dc.date.available2016-10-19T03:58:03Z
dc.date.issued1983en_ZA
dc.descriptionBibliography:pages 116-120.en_ZA
dc.description.abstractThis work was initiated to explore the scope and feasibility of using a gas chromatograph to study catalytic reactions. Various methods have been proposed in the literature and it was decided to investigate various possible systems. Two catalysts were chosen for study. The dehydration of alcohols over alumina catalysts has been extensively studied and found to be ideally suited to studies by gas chromatography. The effect of modification of the catalyst by inorganic ions and by water was investigated. The dehydration of ethanol and pentanol were studied. Results indicated that alumina has two types of active sites responsible for the dehydration of alcohols. Zeolite catalysts are well-known and in this work the catalytic cracking of alkanes over zeolite Y was studied. The reaction mechanism was found to be complex and catalyst deactivation due to build-up of highly carbonaceous deposits occurred. All components of the reaction products were produced at similar rates to the overall reaction rate indicating that desorption of alkane product species was not the rate determining step. Between 150° and 300°C propane was the smallest product formed. Only alkanes were found in the product spectrum which was temperature dependent. Addition of hydrogen gas greatly increased the amount of detectable products. Heptane was found to react significantly above 200 °C, hexane about above 225°C and pentane above 250°C. Hexane and cyclohexane reacted at similar temperatures.en_ZA
dc.identifier.apacitationMason, R. P. (1983). <i>Gas-solid chromatographic studies of two well-known catalysts</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/22190en_ZA
dc.identifier.chicagocitationMason, Robert Peter. <i>"Gas-solid chromatographic studies of two well-known catalysts."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1983. http://hdl.handle.net/11427/22190en_ZA
dc.identifier.citationMason, R. 1983. Gas-solid chromatographic studies of two well-known catalysts. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mason, Robert Peter AB - This work was initiated to explore the scope and feasibility of using a gas chromatograph to study catalytic reactions. Various methods have been proposed in the literature and it was decided to investigate various possible systems. Two catalysts were chosen for study. The dehydration of alcohols over alumina catalysts has been extensively studied and found to be ideally suited to studies by gas chromatography. The effect of modification of the catalyst by inorganic ions and by water was investigated. The dehydration of ethanol and pentanol were studied. Results indicated that alumina has two types of active sites responsible for the dehydration of alcohols. Zeolite catalysts are well-known and in this work the catalytic cracking of alkanes over zeolite Y was studied. The reaction mechanism was found to be complex and catalyst deactivation due to build-up of highly carbonaceous deposits occurred. All components of the reaction products were produced at similar rates to the overall reaction rate indicating that desorption of alkane product species was not the rate determining step. Between 150° and 300°C propane was the smallest product formed. Only alkanes were found in the product spectrum which was temperature dependent. Addition of hydrogen gas greatly increased the amount of detectable products. Heptane was found to react significantly above 200 °C, hexane about above 225°C and pentane above 250°C. Hexane and cyclohexane reacted at similar temperatures. DA - 1983 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1983 T1 - Gas-solid chromatographic studies of two well-known catalysts TI - Gas-solid chromatographic studies of two well-known catalysts UR - http://hdl.handle.net/11427/22190 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22190
dc.identifier.vancouvercitationMason RP. Gas-solid chromatographic studies of two well-known catalysts. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1983 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22190en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleGas-solid chromatographic studies of two well-known catalystsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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