{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/38467"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/38467","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Aromatic hydroxylations over titanium-substituted crystalline silicates","abstract":"This work focuses on aromatic hydroxylations over titanium-substituted zeolites of different pore sizes (TS-1, Al-free Ti-beta and Ti-HMS) using aqueous H2O2 as the oxidant. The aim was to gain a deeper understanding of the key factors controlling activity and selectivity, which implied an investigation of the reaction kinetics and the adsorption and diffusion properties of reactants and products in the various catalysts using different solvents. The role of shape selectivity inside the micropores of the solids and the reaction at their external surface was also examined.","abstract_html":"This work focuses on aromatic hydroxylations over titanium-substituted zeolites of different pore sizes (TS-1, Al-free Ti-beta and Ti-HMS) using aqueous H2O2 as the oxidant. The aim was to gain a deeper understanding of the key factors controlling activity and selectivity, which implied an investigation of the reaction kinetics and the adsorption and diffusion properties of reactants and products in the various catalysts using different solvents. The role of shape selectivity inside the micropores of the solids and the reaction at their external surface was also examined.","abstract_has_math":false,"creators":["Wilkenhöner, Uwe"],"institution":"Department of Chemical Engineering","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["van Steen, Eric","Gammon, David"],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001","date_published":"2001","updated_at":"2026-07-22T22:23:35Z","subjects":["chemical engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/38467","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["van Steen, Eric","Gammon, David"]},{"key":"dc:creator","label":"Author","values":["Wilkenhöner, Uwe"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-09-08T11:44:13Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-09-08T11:44:13Z"]},{"key":"dc:date.issued","label":"Date","values":["2001"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Chemical Engineering"]},{"key":"dc:type","label":"Dc Type","values":["Doctoral Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral","PhD"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["chemical engineering"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/38467"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This work focuses on aromatic hydroxylations over titanium-substituted zeolites of different pore sizes (TS-1, Al-free Ti-beta and Ti-HMS) using aqueous H2O2 as the oxidant. The aim was to gain a deeper understanding of the key factors controlling activity and selectivity, which implied an investigation of the reaction kinetics and the adsorption and diffusion properties of reactants and products in the various catalysts using different solvents. The role of shape selectivity inside the micropores of the solids and the reaction at their external surface was also examined."]},{"key":"dc:title","label":"Title","values":["Aromatic hydroxylations over titanium-substituted crystalline silicates"]}]}],"canonical_facts":{"dc:contributor.advisor":["van Steen, Eric","Gammon, David"],"dc:creator":["Wilkenhöner, Uwe"],"dc:date.accessioned":["2023-09-08T11:44:13Z"],"dc:date.available":["2023-09-08T11:44:13Z"],"dc:date.issued":["2001"],"dc:description.abstract":["This work focuses on aromatic hydroxylations over titanium-substituted zeolites of different pore sizes (TS-1, Al-free Ti-beta and Ti-HMS) using aqueous H2O2 as the oxidant. The aim was to gain a deeper understanding of the key factors controlling activity and selectivity, which implied an investigation of the reaction kinetics and the adsorption and diffusion properties of reactants and products in the various catalysts using different solvents. The role of shape selectivity inside the micropores of the solids and the reaction at their external surface was also examined."],"dc:identifier.uri":["http://hdl.handle.net/11427/38467"],"dc:publisher.department":["Department of Chemical Engineering"],"dc:subject":["chemical engineering"],"dc:title":["Aromatic hydroxylations over titanium-substituted crystalline silicates"],"dc:type":["Doctoral Thesis"],"dc:type.qualificationlevel":["Doctoral","PhD"]},"updated_at":"2026-07-22T22:23:35Z"}