Catalyst‐enhanced plasma oxidation of n‐butane over α‐MnO2 in a temperature‐controlled twin surface dielectric barrier discharge reactor. Issue 4 (15th February 2021)

• Record Type: Journal Article
• Authors: Peters, Niklas; Schücke, Lars; Ollegott, Kevin; Oberste‐Beulmann, Christian; Awakowicz, Peter; Muhler, Martin
• Is Part Of: Plasma processes and polymers. Volume 18:Issue 4(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-15
• Subjects: catalysis -- coatings -- dielectric barrier discharges -- manganese dioxide -- volatile organic compounds; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.202000127
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract: A twin surface dielectric barrier discharge is used for the catalyst‐enhanced plasma oxidation of 300 ppm n ‐butane in synthetic air. Plasma‐only operation results in the conversion of n ‐butane into CO and CO2 . Conversion is improved by increasing the temperature of the feed gas, but selectivity shifts to undesired CO. α‐MnO2 is used as a catalyst deposited on the electrodes by spray coating with a distance of 1.5 mm between the uncoated grid lines and the square catalyst patches to prevent the inhibition of plasma ignition. The catalyst strongly influences selectivity, reaching 40% conversion and 73% selectivity to CO2 at a specific energy density of 390 J·L −1 and 140°C, which is far below the onset temperature of thermocatalytic n ‐butane conversion. Abstract : A twin surface dielectric barrier discharge is used for the catalyst‐enhanced plasma oxidation of 300 ppm n ‐butane in synthetic air. Conversion is improved by increasing the temperature of the feed gas, but selectivity shifts in favor of undesired CO. Spray‐coated electrodes with a distance of 1.5 mm between the uncoated grid lines and the square α‐MnO2 catalyst patches strongly influence the selectivity in favor of CO2 . The same conversion of 40% is reached with 73% selectivity to CO2 at 390 J·L −1 and 140°C far below the onset temperature of thermocatalytic n ‐butane conversion.