{"id":{"repo_id":"birmingham","oai_identifier":"oai:etheses.bham.ac.uk:1501"},"canonical_url":"https://search.dev.ndltd.org/etd/birmingham/oai:etheses.bham.ac.uk:1501","repository":{"repo_id":"birmingham","name":"University of Birmingham","base_url":"https://etheses.bham.ac.uk/cgi/oai2"},"display":{"title":"Removal of nitrogen containing hydrocarbons from wastewater by catalytic and non-catalytic hydrothermal oxidation, in sub- and supercritical conditions","abstract":"The results of the hydrothermal oxidation of 1,8 diazabicyclo[5.4.0]undec-7-ene (DBU), a toxic nitrogen-containing organic compound by different processes is presented here. Subcritical experiments (wet air oxidation (WAO) and catalytic wet air oxidation(CWAO)), were conducted in a batch reactor and supercritical water oxidation (SCWO) experiments were conducted in a tubular reactor. The key operating parameters investigated were temperature, pressure, initial organic concentration; for catalytic experiments, the effect of catalyst metal loading and weight were also investigated. Commercially available Ru/Al\\(_2\\)O\\(_3\\) pellets were selected for catalytic study after various catalysts were screened. Results indicated that temperature was the key operating parameter in all 3 processes that affected DBU removal, TOC removal and ammonia yield. Ru/Al\\(_2\\)O\\(_3\\) pellets enhanced the DBU removal, TOC removal and decreased ammonia yield compared to WAO. Complete DBU removal was achieved by catalytic wet air oxidation and supercritical water oxidation. Kinetic data was acquired and a pseudo first order kinetic model was used to quantify the oxidation rate. WAO and CWAO were investigated for the treatment of hazardous industrial effluent with a high initial ammonia concentration and complete ammonia removal was achieved using Ru/Al\\(_2\\)O\\(_3\\) pellets. A novel ruthenium coated reticulated foam monolith was investigated as an alternative for heterogeneous catalyst instead of Ru/Al\\(_2\\)O\\(_3\\) pellets, the results show that it improved catalyst stability and could be an alternative to pellets for wastewater treatment.","abstract_html":"The results of the hydrothermal oxidation of 1,8 diazabicyclo[5.4.0]undec-7-ene (DBU), a toxic nitrogen-containing organic compound by different processes is presented here. Subcritical experiments (wet air oxidation (WAO) and catalytic wet air oxidation(CWAO)), were conducted in a batch reactor and supercritical water oxidation (SCWO) experiments were conducted in a tubular reactor. The key operating parameters investigated were temperature, pressure, initial organic concentration; for catalytic experiments, the effect of catalyst metal loading and weight were also investigated. Commercially available Ru/Al<span class=\"etd-inline-math\"><sub>2</sub></span>O<span class=\"etd-inline-math\"><sub>3</sub></span> pellets were selected for catalytic study after various catalysts were screened. Results indicated that temperature was the key operating parameter in all 3 processes that affected DBU removal, TOC removal and ammonia yield. Ru/Al<span class=\"etd-inline-math\"><sub>2</sub></span>O<span class=\"etd-inline-math\"><sub>3</sub></span> pellets enhanced the DBU removal, TOC removal and decreased ammonia yield compared to WAO. Complete DBU removal was achieved by catalytic wet air oxidation and supercritical water oxidation. Kinetic data was acquired and a pseudo first order kinetic model was used to quantify the oxidation rate. WAO and CWAO were investigated for the treatment of hazardous industrial effluent with a high initial ammonia concentration and complete ammonia removal was achieved using Ru/Al<span class=\"etd-inline-math\"><sub>2</sub></span>O<span class=\"etd-inline-math\"><sub>3</sub></span> pellets. A novel ruthenium coated reticulated foam monolith was investigated as an alternative for heterogeneous catalyst instead of Ru/Al<span class=\"etd-inline-math\"><sub>2</sub></span>O<span class=\"etd-inline-math\"><sub>3</sub></span> pellets, the results show that it improved catalyst stability and could be an alternative to pellets for wastewater treatment.","abstract_has_math":true,"creators":["Osibo, Oluwaponmile Olumayowa"],"institution":"University of Birmingham","degree_name":"d_ph","degree_level":"d_ph","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07","date_published":"2011-07","updated_at":"2026-07-24T01:11:33Z","subjects":["TP Chemical technology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.sponsor","label":"Sponsor","values":["na"]},{"key":"dc:creator","label":"Author","values":["Osibo, Oluwaponmile Olumayowa"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07"]},{"key":"dc:date.issued","label":"Date","values":["2011-07"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["College of Engineering & Physical Sciences","School of Chemical Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Birmingham"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["http://etheses.bham.ac.uk//id/eprint/1501/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["d_ph"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["d_ph"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["TP Chemical technology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://etheses.bham.ac.uk//id/eprint/1501/1/Osibo11PhD.pdf","http://etheses.bham.ac.uk//id/eprint/1501/2/Decl_IS_Osibo11PhD.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The results of the hydrothermal oxidation of 1,8 diazabicyclo[5.4.0]undec-7-ene (DBU), a toxic nitrogen-containing organic compound by different processes is presented here. Subcritical experiments (wet air oxidation (WAO) and catalytic wet air oxidation(CWAO)), were conducted in a batch reactor and supercritical water oxidation (SCWO) experiments were conducted in a tubular reactor. The key operating parameters investigated were temperature, pressure, initial organic concentration; for catalytic experiments, the effect of catalyst metal loading and weight were also investigated. Commercially available Ru/Al\\(_2\\)O\\(_3\\) pellets were selected for catalytic study after various catalysts were screened. Results indicated that temperature was the key operating parameter in all 3 processes that affected DBU removal, TOC removal and ammonia yield. Ru/Al\\(_2\\)O\\(_3\\) pellets enhanced the DBU removal, TOC removal and decreased ammonia yield compared to WAO. Complete DBU removal was achieved by catalytic wet air oxidation and supercritical water oxidation. Kinetic data was acquired and a pseudo first order kinetic model was used to quantify the oxidation rate. WAO and CWAO were investigated for the treatment of hazardous industrial effluent with a high initial ammonia concentration and complete ammonia removal was achieved using Ru/Al\\(_2\\)O\\(_3\\) pellets. A novel ruthenium coated reticulated foam monolith was investigated as an alternative for heterogeneous catalyst instead of Ru/Al\\(_2\\)O\\(_3\\) pellets, the results show that it improved catalyst stability and could be an alternative to pellets for wastewater treatment."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Removal of nitrogen containing hydrocarbons from wastewater by catalytic and non-catalytic hydrothermal oxidation, in sub- and supercritical conditions"]}]}],"canonical_facts":{"dc:contributor.sponsor":["na"],"dc:creator":["Osibo, Oluwaponmile Olumayowa"],"dc:date":["2011-07"],"dc:date.issued":["2011-07"],"dc:description.abstract":["The results of the hydrothermal oxidation of 1,8 diazabicyclo[5.4.0]undec-7-ene (DBU), a toxic nitrogen-containing organic compound by different processes is presented here. Subcritical experiments (wet air oxidation (WAO) and catalytic wet air oxidation(CWAO)), were conducted in a batch reactor and supercritical water oxidation (SCWO) experiments were conducted in a tubular reactor. The key operating parameters investigated were temperature, pressure, initial organic concentration; for catalytic experiments, the effect of catalyst metal loading and weight were also investigated. Commercially available Ru/Al\\(_2\\)O\\(_3\\) pellets were selected for catalytic study after various catalysts were screened. Results indicated that temperature was the key operating parameter in all 3 processes that affected DBU removal, TOC removal and ammonia yield. Ru/Al\\(_2\\)O\\(_3\\) pellets enhanced the DBU removal, TOC removal and decreased ammonia yield compared to WAO. Complete DBU removal was achieved by catalytic wet air oxidation and supercritical water oxidation. Kinetic data was acquired and a pseudo first order kinetic model was used to quantify the oxidation rate. WAO and CWAO were investigated for the treatment of hazardous industrial effluent with a high initial ammonia concentration and complete ammonia removal was achieved using Ru/Al\\(_2\\)O\\(_3\\) pellets. A novel ruthenium coated reticulated foam monolith was investigated as an alternative for heterogeneous catalyst instead of Ru/Al\\(_2\\)O\\(_3\\) pellets, the results show that it improved catalyst stability and could be an alternative to pellets for wastewater treatment."],"dc:format":["application/pdf"],"dc:identifier.uri":["http://etheses.bham.ac.uk//id/eprint/1501/1/Osibo11PhD.pdf","http://etheses.bham.ac.uk//id/eprint/1501/2/Decl_IS_Osibo11PhD.pdf"],"dc:publisher.department":["College of Engineering & Physical Sciences","School of Chemical Engineering"],"dc:publisher.institution":["University of Birmingham"],"dc:relation.isreferencedby":["http://etheses.bham.ac.uk//id/eprint/1501/"],"dc:subject":["TP Chemical technology"],"dc:title":["Removal of nitrogen containing hydrocarbons from wastewater by catalytic and non-catalytic hydrothermal oxidation, in sub- and supercritical conditions"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["d_ph"],"dc:type.qualificationname":["d_ph"]},"updated_at":"2026-07-24T01:11:33Z"}