{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/5325"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/5325","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Migration of potassium in an iron-based Fischer-Tropsch/zeolite composite catalyst","abstract":"The product of the Fischer-Tropsch synthesis is low in aromatics and as a result has relatively poor gasoline quality (with respect to the octane number). Due to the low octane value of gasoline, extensive work-up to improve the octane number is required. Thus the cracking of longer chain hydrocarbons and the oligomerisation of light olefins may increase the yield of gasoline products. The branched and aromatic products formed from skeleton isomerisation and aromatisation reaction over acid zeolites have a high octane number. Thus an alternative process proposed for the production of high quality gasoline from synthesis gas utilises a composite catalyst comprising of an alkali promoted iron based Fischer Tropsch (FT) catalyst and an acidic co-catalyst (ZSM-5) [Udaya et al, 1990; Schulz et al, 1991]. Therefore by using a zeolite combined with a Fischer Tropsch catalyst will result in an increase in the selectivity and quality of the gasoline range products [Botes and Böhringer, 2004, Schulz et al, 1991].","abstract_html":"The product of the Fischer-Tropsch synthesis is low in aromatics and as a result has relatively poor gasoline quality (with respect to the octane number). Due to the low octane value of gasoline, extensive work-up to improve the octane number is required. Thus the cracking of longer chain hydrocarbons and the oligomerisation of light olefins may increase the yield of gasoline products. The branched and aromatic products formed from skeleton isomerisation and aromatisation reaction over acid zeolites have a high octane number. Thus an alternative process proposed for the production of high quality gasoline from synthesis gas utilises a composite catalyst comprising of an alkali promoted iron based Fischer Tropsch (FT) catalyst and an acidic co-catalyst (ZSM-5) [Udaya et al, 1990; Schulz et al, 1991]. Therefore by using a zeolite combined with a Fischer Tropsch catalyst will result in an increase in the selectivity and quality of the gasoline range products [Botes and Böhringer, 2004, Schulz et al, 1991].","abstract_has_math":false,"creators":["Gwagwa, Xoliswa Yolanda"],"institution":"Department of Chemical Engineering","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2008,"date_issued":"2008","date_published":"2008","updated_at":"2026-07-22T22:22:55Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/5325","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Gwagwa, Xoliswa Yolanda"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-07-31T11:09:44Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-31T11:09:44Z"]},{"key":"dc:date.issued","label":"Date","values":["2008"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Chemical Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["MSc"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/5325"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Includes abstract.","Includes bibliographical references (leaves 76-82)."]},{"key":"dc:description.abstract","label":"Abstract","values":["The product of the Fischer-Tropsch synthesis is low in aromatics and as a result has relatively poor gasoline quality (with respect to the octane number). Due to the low octane value of gasoline, extensive work-up to improve the octane number is required. Thus the cracking of longer chain hydrocarbons and the oligomerisation of light olefins may increase the yield of gasoline products. The branched and aromatic products formed from skeleton isomerisation and aromatisation reaction over acid zeolites have a high octane number. Thus an alternative process proposed for the production of high quality gasoline from synthesis gas utilises a composite catalyst comprising of an alkali promoted iron based Fischer Tropsch (FT) catalyst and an acidic co-catalyst (ZSM-5) [Udaya et al, 1990; Schulz et al, 1991]. Therefore by using a zeolite combined with a Fischer Tropsch catalyst will result in an increase in the selectivity and quality of the gasoline range products [Botes and Böhringer, 2004, Schulz et al, 1991]."]},{"key":"dc:title","label":"Title","values":["Migration of potassium in an iron-based Fischer-Tropsch/zeolite composite catalyst"]}]}],"canonical_facts":{"dc:creator":["Gwagwa, Xoliswa Yolanda"],"dc:date.accessioned":["2014-07-31T11:09:44Z"],"dc:date.available":["2014-07-31T11:09:44Z"],"dc:date.issued":["2008"],"dc:description":["Includes abstract.","Includes bibliographical references (leaves 76-82)."],"dc:description.abstract":["The product of the Fischer-Tropsch synthesis is low in aromatics and as a result has relatively poor gasoline quality (with respect to the octane number). Due to the low octane value of gasoline, extensive work-up to improve the octane number is required. Thus the cracking of longer chain hydrocarbons and the oligomerisation of light olefins may increase the yield of gasoline products. The branched and aromatic products formed from skeleton isomerisation and aromatisation reaction over acid zeolites have a high octane number. Thus an alternative process proposed for the production of high quality gasoline from synthesis gas utilises a composite catalyst comprising of an alkali promoted iron based Fischer Tropsch (FT) catalyst and an acidic co-catalyst (ZSM-5) [Udaya et al, 1990; Schulz et al, 1991]. Therefore by using a zeolite combined with a Fischer Tropsch catalyst will result in an increase in the selectivity and quality of the gasoline range products [Botes and Böhringer, 2004, Schulz et al, 1991]."],"dc:identifier.uri":["http://hdl.handle.net/11427/5325"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Chemical Engineering"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Migration of potassium in an iron-based Fischer-Tropsch/zeolite composite catalyst"],"dc:type":["Master Thesis"],"dc:type.qualificationlevel":["Masters"],"dc:type.qualificationname":["MSc"]},"updated_at":"2026-07-22T22:22:55Z"}