{"id":{"repo_id":"uoit","oai_identifier":"oai:ontariotechu.scholaris.ca:10155/2107"},"canonical_url":"https://search.dev.ndltd.org/etd/uoit/oai:ontariotechu.scholaris.ca:10155/2107","repository":{"repo_id":"uoit","name":"Ontario Institute of Technology","base_url":"https://ontariotechu.scholaris.ca/server/oai/request"},"display":{"title":"Experimental and analytical investigation of a new integrated reactor for hydrogen and methanol production with ocean carbon dioxide","abstract":"This study introduces and evaluates a novel integrated three-compartment electrolytic cation exchange membrane (E-CEM) reactor designed for the simultaneous extraction of carbon dioxide (CO₂) from ocean water and the generation of hydrogen (H₂), with the goal of green methanol synthesis. The E-CEM reactor operates through electrochemical acidification and cation exchange processes to convert oceanic bicarbonates and carbonates into gaseous CO₂, while concurrently producing hydrogen via ocean water electrolysis. A maximum CO₂ extraction rate of 1514.60 mg/min is achieved under optimized conditions, 13–14.80 V, 1.80–2.0 M electrolyte concentration, and pH 2.2–3.0. Hydrogen generation increases to 2.07 mg/min at 12.80 V with 1.70 mol/L concentration. Further optimization of raising the concentration to 1.85 mol/L and reducing the pH to 2.0 increases H₂ production to 2.20 mg/min. In terms of sustainability, the E-CEM reactor demonstrates a 20% higher exergetic sustainability index compared to the peristaltic pump under ambient pressures ranging from 100 to 1000 kPa. In methane production tests using an H-cell setup, 1.5 M electrolyte yields the highest output, reaching 900 ppm during early stages. H-cell methanol synthesis, confirms via the acetylacetone spectrophotometric method, shows improved yields with increasing electrolyte concentration: 5.50 mg/L at 0.5 M, 7.20 mg/L at 1.5 M and 8.70 mg/L at 2.0 M. In the integrated H-cell and E-CEM configuration, methanol production reaches 4.20 mg/L at 7 V. Overall, the integrated E-CEM system demonstrates an energy efficiency of 7% and an exergy efficiency of 9%. While these values demonstrate promising performance, they also indicate room for further optimization. The E-CEM reactor is therefore placed as a promising and scalable green solution for sustainable CO₂ utilization and hydrogen-based energy systems.","abstract_html":"This study introduces and evaluates a novel integrated three-compartment electrolytic cation exchange membrane (E-CEM) reactor designed for the simultaneous extraction of carbon dioxide (CO₂) from ocean water and the generation of hydrogen (H₂), with the goal of green methanol synthesis. The E-CEM reactor operates through electrochemical acidification and cation exchange processes to convert oceanic bicarbonates and carbonates into gaseous CO₂, while concurrently producing hydrogen via ocean water electrolysis. A maximum CO₂ extraction rate of 1514.60 mg/min is achieved under optimized conditions, 13–14.80 V, 1.80–2.0 M electrolyte concentration, and pH 2.2–3.0. Hydrogen generation increases to 2.07 mg/min at 12.80 V with 1.70 mol/L concentration. Further optimization of raising the concentration to 1.85 mol/L and reducing the pH to 2.0 increases H₂ production to 2.20 mg/min. In terms of sustainability, the E-CEM reactor demonstrates a 20% higher exergetic sustainability index compared to the peristaltic pump under ambient pressures ranging from 100 to 1000 kPa. In methane production tests using an H-cell setup, 1.5 M electrolyte yields the highest output, reaching 900 ppm during early stages. H-cell methanol synthesis, confirms via the acetylacetone spectrophotometric method, shows improved yields with increasing electrolyte concentration: 5.50 mg/L at 0.5 M, 7.20 mg/L at 1.5 M and 8.70 mg/L at 2.0 M. In the integrated H-cell and E-CEM configuration, methanol production reaches 4.20 mg/L at 7 V. Overall, the integrated E-CEM system demonstrates an energy efficiency of 7% and an exergy efficiency of 9%. While these values demonstrate promising performance, they also indicate room for further optimization. The E-CEM reactor is therefore placed as a promising and scalable green solution for sustainable CO₂ utilization and hydrogen-based energy systems.","abstract_has_math":false,"creators":["Akci Turgut, Hilal Sayhan"],"institution":"University of Ontario Institute of Technology","degree_name":"Doctor of Philosophy (PhD)","degree_level":null,"degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Dincer, Ibrahim"],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-06-01","date_published":"2025-06-01","updated_at":"2026-07-24T05:35:22Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10155/2107","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Dincer, Ibrahim"]},{"key":"dc:creator","label":"Author","values":["Akci Turgut, Hilal Sayhan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2026-06-05T15:44:49Z"]},{"key":"dc:date.issued","label":"Date","values":["2025-06-01"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Ontario Institute of Technology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10155/2107"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This study introduces and evaluates a novel integrated three-compartment electrolytic cation exchange membrane (E-CEM) reactor designed for the simultaneous extraction of carbon dioxide (CO₂) from ocean water and the generation of hydrogen (H₂), with the goal of green methanol synthesis. The E-CEM reactor operates through electrochemical acidification and cation exchange processes to convert oceanic bicarbonates and carbonates into gaseous CO₂, while concurrently producing hydrogen via ocean water electrolysis. A maximum CO₂ extraction rate of 1514.60 mg/min is achieved under optimized conditions, 13–14.80 V, 1.80–2.0 M electrolyte concentration, and pH 2.2–3.0. Hydrogen generation increases to 2.07 mg/min at 12.80 V with 1.70 mol/L concentration. Further optimization of raising the concentration to 1.85 mol/L and reducing the pH to 2.0 increases H₂ production to 2.20 mg/min. In terms of sustainability, the E-CEM reactor demonstrates a 20% higher exergetic sustainability index compared to the peristaltic pump under ambient pressures ranging from 100 to 1000 kPa. In methane production tests using an H-cell setup, 1.5 M electrolyte yields the highest output, reaching 900 ppm during early stages. H-cell methanol synthesis, confirms via the acetylacetone spectrophotometric method, shows improved yields with increasing electrolyte concentration: 5.50 mg/L at 0.5 M, 7.20 mg/L at 1.5 M and 8.70 mg/L at 2.0 M. In the integrated H-cell and E-CEM configuration, methanol production reaches 4.20 mg/L at 7 V. Overall, the integrated E-CEM system demonstrates an energy efficiency of 7% and an exergy efficiency of 9%. While these values demonstrate promising performance, they also indicate room for further optimization. The E-CEM reactor is therefore placed as a promising and scalable green solution for sustainable CO₂ utilization and hydrogen-based energy systems."]},{"key":"dc:title","label":"Title","values":["Experimental and analytical investigation of a new integrated reactor for hydrogen and methanol production with ocean carbon dioxide"]}]}],"canonical_facts":{"dc:contributor.advisor":["Dincer, Ibrahim"],"dc:creator":["Akci Turgut, Hilal Sayhan"],"dc:date.accessioned":["2026-06-05T15:44:49Z"],"dc:date.issued":["2025-06-01"],"dc:description.abstract":["This study introduces and evaluates a novel integrated three-compartment electrolytic cation exchange membrane (E-CEM) reactor designed for the simultaneous extraction of carbon dioxide (CO₂) from ocean water and the generation of hydrogen (H₂), with the goal of green methanol synthesis. The E-CEM reactor operates through electrochemical acidification and cation exchange processes to convert oceanic bicarbonates and carbonates into gaseous CO₂, while concurrently producing hydrogen via ocean water electrolysis. A maximum CO₂ extraction rate of 1514.60 mg/min is achieved under optimized conditions, 13–14.80 V, 1.80–2.0 M electrolyte concentration, and pH 2.2–3.0. Hydrogen generation increases to 2.07 mg/min at 12.80 V with 1.70 mol/L concentration. Further optimization of raising the concentration to 1.85 mol/L and reducing the pH to 2.0 increases H₂ production to 2.20 mg/min. In terms of sustainability, the E-CEM reactor demonstrates a 20% higher exergetic sustainability index compared to the peristaltic pump under ambient pressures ranging from 100 to 1000 kPa. In methane production tests using an H-cell setup, 1.5 M electrolyte yields the highest output, reaching 900 ppm during early stages. H-cell methanol synthesis, confirms via the acetylacetone spectrophotometric method, shows improved yields with increasing electrolyte concentration: 5.50 mg/L at 0.5 M, 7.20 mg/L at 1.5 M and 8.70 mg/L at 2.0 M. In the integrated H-cell and E-CEM configuration, methanol production reaches 4.20 mg/L at 7 V. Overall, the integrated E-CEM system demonstrates an energy efficiency of 7% and an exergy efficiency of 9%. While these values demonstrate promising performance, they also indicate room for further optimization. The E-CEM reactor is therefore placed as a promising and scalable green solution for sustainable CO₂ utilization and hydrogen-based energy systems."],"dc:identifier.uri":["https://hdl.handle.net/10155/2107"],"dc:language.iso":["en"],"dc:title":["Experimental and analytical investigation of a new integrated reactor for hydrogen and methanol production with ocean carbon dioxide"],"dc:type":["Dissertation"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_name":["Doctor of Philosophy (PhD)"],"thesis:institution_name":["University of Ontario Institute of Technology"]},"updated_at":"2026-07-24T05:35:22Z"}