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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/30117

Title: Catalytic Gasification of Activated Sludge in Near-critical Water
Authors: Afif, Elie Jose Antonio
Advisor: Farnood, Ramin
Department: Chemical Engineering and Applied Chemistry
Keywords: supercritical water
gasification
activated sludge
catalyst
hydrothermal
Issue Date: 30-Nov-2011
Abstract: This thesis was the report of the research done on the near-critical water gasification (NCWG) as an application for activated sludge treatment. The research started with the use of model compounds and binary mixtures of these compounds as feeds for the NCWG. High gasification yields were obtained using a commercial catalyst (Raney nickel), and it was found that interactions between model compounds in the binary mixtures resulted in lowering the gasification efficiencies. The research then shifted to the use of actual activated sludge samples and the search for novel catalysts for that application. Almost 70% of the sludge was gasified in the presence of the high amounts of Raney nickel. Hydrogen was the main product in the gas phase. However, Raney nickel lost half its activity after only 8 minutes of exposure to supercritical water. For some model compounds, novel catalysts formulated in our laboratories had better activities than the commercial ones. This was not the case for the NCWG of activated sludge.
URI: http://hdl.handle.net/1807/30117
Appears in Collections:Master

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