Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins

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dc.contributor.advisorO'Connor, Cyrilen_ZA
dc.contributor.authorHowden, Michael Gen_ZA
dc.date.accessioned2016-09-06T14:45:50Z
dc.date.available2016-09-06T14:45:50Z
dc.date.issued1993en_ZA
dc.description.abstractThe use of organic bases in the synthesis of zeolites can lead to the crystallisation of several completely original structures. Zeolite ZSM-5 is produced using tetrapropylammonium cations. This cationic material can be replaced by amines or diamines, although in this case it becomes more difficult to synthesise the zeolite. ZSM-5 has a three dimensional channel system, having apertures which are slightly larger than 0,5 nm. This means that during reactions, there is a control over the size of the molecules that can enter or exit from the pores of the zeolite: this process is called "shape selective11 catalysis. The conversion of methanol over ZSM-5 proceeds via dehydration to give firstly dimethyl ether and then light olefins. The olefins may subsequently undergo dehydrocyclisation to produce a mixture of light paraffins and aromatics, which are restricted to monocyclics and do not contain more than ten carbon atoms. As a result of these properties, ZSM-5 is an ideal catalyst for several industrial processes. Methanol can be converted directly to synthetic gasoline, or by restricting the conversion, olefins can be obtained. Naturally olefins themselves, as well as alkanes, can be converted to aromatics. An entirely different reaction has been found by using a high pressure and relative low temperature, where olefins can be oligomerised to produce diesel.en_ZA
dc.identifier.apacitationHowden, M. G. (1993). <i>Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/21701en_ZA
dc.identifier.chicagocitationHowden, Michael G. <i>"Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1993. http://hdl.handle.net/11427/21701en_ZA
dc.identifier.citationHowden, M. 1993. Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Howden, Michael G AB - The use of organic bases in the synthesis of zeolites can lead to the crystallisation of several completely original structures. Zeolite ZSM-5 is produced using tetrapropylammonium cations. This cationic material can be replaced by amines or diamines, although in this case it becomes more difficult to synthesise the zeolite. ZSM-5 has a three dimensional channel system, having apertures which are slightly larger than 0,5 nm. This means that during reactions, there is a control over the size of the molecules that can enter or exit from the pores of the zeolite: this process is called "shape selective11 catalysis. The conversion of methanol over ZSM-5 proceeds via dehydration to give firstly dimethyl ether and then light olefins. The olefins may subsequently undergo dehydrocyclisation to produce a mixture of light paraffins and aromatics, which are restricted to monocyclics and do not contain more than ten carbon atoms. As a result of these properties, ZSM-5 is an ideal catalyst for several industrial processes. Methanol can be converted directly to synthetic gasoline, or by restricting the conversion, olefins can be obtained. Naturally olefins themselves, as well as alkanes, can be converted to aromatics. An entirely different reaction has been found by using a high pressure and relative low temperature, where olefins can be oligomerised to produce diesel. DA - 1993 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1993 T1 - Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins TI - Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins UR - http://hdl.handle.net/11427/21701 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21701
dc.identifier.vancouvercitationHowden MG. Synthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefins. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1993 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21701en_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.titleSynthesis of highly siliceous ZSM-5 using diaminoalkanes and their application for the conversion of methanol to light olefinsen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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