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Catalyst‐enhanced plasma oxidation of n ‐butane over α‐MnO 2 in a temperature‐controlled twin surface dielectric barrier discharge reactor
Author(s) -
Peters Niklas,
Schücke Lars,
Ollegott Kevin,
ObersteBeulmann Christian,
Awakowicz Peter,
Muhler Martin
Publication year - 2021
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202000127
Subject(s) - dielectric barrier discharge , butane , selectivity , catalysis , materials science , ignition system , chemical engineering , plasma , dielectric , analytical chemistry (journal) , inorganic chemistry , chemistry , organic chemistry , optoelectronics , thermodynamics , physics , quantum mechanics , engineering
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 CO 2 . Conversion is improved by increasing the temperature of the feed gas, but selectivity shifts to undesired CO. α‐MnO 2 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 CO 2 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.