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Title: Applications of colloidal gold and palladium nano-catalysts
Author: Hamill, Conor Daniel
ISNI:       0000 0004 5372 1477
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2014
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Colloidal synthesis can be used to functionally design the morphology of nanoparticles for specific applications. A sol-immobilisation technique has been successfully employed to synthesize bi-metallic gold and palladium nano-catalysts. The ability of a gold and palladium bimetallic catalyst to selectively oxidise toluene has been used to enhance the hydrocarbon selective catalytic reduction (HC-SCR) of NOx. The influence of reactor configuration on performance is also evaluated and an alternative HC-SCR system design is presented. The capacity of gold and palladium nano-catalysts to produce benzonitrile at low temperatures was further explored. Both nitroxidation and ammoxidation synthesis routes were employed to maximise nitrile productivity. The rate limiting partial oxidation step is 'by-passed' by utilising benzyl alcohol as a reactant, and the subsequent production of benzonitrile is evaluated for an array of Au-Pd catalysts. The ammoxidation of an aliphatic alcohol; ethanol is also examined. Currently 90% of ethanol production is sourced from biomass, with bio-ethanol considered a sustainable platform chemical of the future. The influence of metal composition, preparation method, metal loading and support selection on catalytic performance is assessed. The stability of the gold and palladium catalysts is examined and deactivation mechanisms are explored. A potential process for the ammoxidation for ethanol is presented and the various unit operations required for a high purity grade acetonitrile product are discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available