Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman

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dc.contributor.advisorVan Steen, Ericen_ZA
dc.contributor.authorJacobs, Kelvin Stephenen_ZA
dc.date.accessioned2014-07-31T11:09:21Z
dc.date.available2014-07-31T11:09:21Z
dc.date.issued2002en_ZA
dc.descriptionBibliography: leaves 89-94.
dc.description.abstractMetathesis is a very versatile reaction, which allows the conversion of Simple, relatively inexpensive olefins into specialty, high-purity olefins which are useful intermediates in the fragrance, agricultural and many other specialty chemical industries. Supported molybdenum on alumina is an active heterogeneous catalyst for the metathesis of olefins. Its activity, as a function of time, passes a maximum. It is known that the activity of molybdenum-based catalyst increases up to monolayer capacity. Catalysts with various Mo-Ioadings were prepared by controlled adsorption method using ammonium heptamolybdate as a precursor. A catalyst using a new slurry impregnation method was also prepared for comparative reasons. Before the metathesis process, the molybdenum catalysts are activated at 550°C under N2 in a fixed bed reactor. The loading of the prepared catalysts was below and above monolayer capacity. It was observed that up to a loading 0.3 g Mo03 per g Ab03 the initial conversion increases more than proportional to the Mo03- loading. The catalysts with a Mo03-loading higher than 0.3 g Mo03 per gram AIz03 show initially a lower activity, ie. The activity per molybdenum atom in the catalyst decreases. With increasing time-on-stream the activity of the catalysts declines. The decline is much stronger over the catalysts with a rligher initial activity.en_ZA
dc.identifier.apacitationJacobs, K. S. (2002). <i>Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/5314en_ZA
dc.identifier.chicagocitationJacobs, Kelvin Stephen. <i>"Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2002. http://hdl.handle.net/11427/5314en_ZA
dc.identifier.citationJacobs, K. 2002. Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Jacobs, Kelvin Stephen AB - Metathesis is a very versatile reaction, which allows the conversion of Simple, relatively inexpensive olefins into specialty, high-purity olefins which are useful intermediates in the fragrance, agricultural and many other specialty chemical industries. Supported molybdenum on alumina is an active heterogeneous catalyst for the metathesis of olefins. Its activity, as a function of time, passes a maximum. It is known that the activity of molybdenum-based catalyst increases up to monolayer capacity. Catalysts with various Mo-Ioadings were prepared by controlled adsorption method using ammonium heptamolybdate as a precursor. A catalyst using a new slurry impregnation method was also prepared for comparative reasons. Before the metathesis process, the molybdenum catalysts are activated at 550°C under N2 in a fixed bed reactor. The loading of the prepared catalysts was below and above monolayer capacity. It was observed that up to a loading 0.3 g Mo03 per g Ab03 the initial conversion increases more than proportional to the Mo03- loading. The catalysts with a Mo03-loading higher than 0.3 g Mo03 per gram AIz03 show initially a lower activity, ie. The activity per molybdenum atom in the catalyst decreases. With increasing time-on-stream the activity of the catalysts declines. The decline is much stronger over the catalysts with a rligher initial activity. DA - 2002 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman TI - Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman UR - http://hdl.handle.net/11427/5314 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/5314
dc.identifier.vancouvercitationJacobs KS. Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2002 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5314en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleInvestigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ ramanen_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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