title: The Quest for Value-Added Products from Carbon Dioxide and Water in a Dielectric Barrier Discharge: A Chemical Kinetics Study.
abstract: Recycling of carbon dioxide by its conversion into value-added products has gained significant interest owing to the role it can play for use in an anthropogenic carbon cycle. The combined conversion with H2O could even mimic the natural photosynthesis process. An interesting gas conversion technique currently being considered in the field of CO2conversion is plasma technology. To investigate whether it is also promising for this combined conversion, we performed a series of experiments and developed a chemical kinetics plasma chemistry model for a deeper understanding of the process. The main products formed were the syngas components CO and H2, as well as O2and H2O2, whereas methanol formation was only observed in the parts-per-billion to parts-per-million range. The syngas ratio, on the other hand, could easily be controlled by varying both the water content and/or energy input. On the basis of the model, which was validated with experimental results, a chemical kinetics analysis was performed, which allowed the construction and investigation of the different pathways leading to the observed experimental results and which helped to clarify these results. This approach allowed us to evaluate this technology on the basis of its underlying chemistry and to propose solutions on how to further improve the formation of value-added products by using plasma technology.
authors.affiliation: Department of Chemistry, research group PLASMANT, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium.
authors.forename: Ramses
authors.identifier: 0000-0002-3911-4035
authors.initials: R
authors.lastname: Snoeckx
authors.affiliation: Chimie analytique et chimie des interfaces, Université Libre de Bruxelles, Campus de la Plaine, Bâtiment A, CP255, boulevard du Triomphe, 1050, Bruxelles, Belgium.
authors.forename: Alp
authors.initials: A
authors.lastname: Ozkan
authors.affiliation: Chimie analytique et chimie des interfaces, Université Libre de Bruxelles, Campus de la Plaine, Bâtiment A, CP255, boulevard du Triomphe, 1050, Bruxelles, Belgium.
authors.forename: Francois
authors.initials: F
authors.lastname: Reniers
authors.affiliation: Department of Chemistry, research group PLASMANT, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium.
authors.forename: Annemie
authors.initials: A
authors.lastname: Bogaerts
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D017097:Electric Impedance; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D000432:Methanol / Q000737:chemistry; D008956:Models, Chemical; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D002245:Carbon Dioxide; D006861:Hydrogen Peroxide; D000432:Methanol
keywords: carbon dioxide; kinetics; nonthermal plasma; plasma chemistry; water splitting