Title Effect of argon or helium on the $CO_{2}$ conversion in a dielectric barrier dischargeEffect of argon or helium on the $CO_{2}$ conversion in a dielectric barrier discharge Author Ramakers, Marleen Michielsen, Inne Aerts, Robby Meynen, Vera Bogaerts, Annemie Faculty/Department Faculty of Sciences. Chemistry Research group Laboratory of adsorption and catalysis Plasma, laser ablation and surface modeling - Antwerp (PLASMANT) Publication type article Publication 2015Weinheim, 2015 Subject Physics Chemistry Source (journal) Plasma processes and polymers. - Weinheim Volume/pages 12(2015):8, p. 755-763 ISSN 1612-8850 ISI 000359672400007 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract This paper demonstrates that the CO2 conversion in a dielectric barrier discharge rises drastically upon addition of Ar or He, and the effect is more pronounced for Ar than for He. The effective CO2 conversion, on the other hand, drops upon addition of Ar or He, which is logical due to the lower CO2 content in the gas mixture, and the same is true for the energy efficiency, because a considerable fraction of the energy is then consumed into ionization/excitation of Ar or He atoms. The higher absolute CO2 conversion upon addition of Ar or He can be explained by studying in detail the Lissajous plots and the current profiles. The breakdown voltage is lower in the CO2/Ar and CO2/He mixtures, and the discharge gap is more filled with plasma, which enhances the possibility for CO2 conversion. The rates of electron impact excitationdissociation of CO2, estimated from the electron densities and mean electron energies, are indeed higher in the CO2/Ar and (to a lower extent) in the CO2/He mixtures, compared to the pure CO2 plasma. Moreover, charge transfer between Ar+ or Ar2+ ions and CO2, followed by electron-ion dissociative recombination of the CO2+ ions, might also contribute to, or even be dominant for the CO2 dissociation. All these effects can explain the higher CO2 conversion, especially upon addition of Ar, but also upon addition of He. E-info https://repository.uantwerpen.be/docman/iruaauth/847da8/b8a5b3f2988.pdf Full text (open access) https://repository.uantwerpen.be/docman/irua/cc14b8/10604.pdf E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000359672400007&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000359672400007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000359672400007&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle