Title
Gas purification by nonthermal plasma : a case study of ethylene Gas purification by nonthermal plasma : a case study of ethylene
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Easton, Pa ,
Subject
Chemistry
Biology
Source (journal)
Environmental science and technology / American Chemical Society. - Easton, Pa
Volume/pages
47(2013) :12 , p. 6478-6485
ISSN
0013-936X
ISI
000320749000051
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The destruction of ethylene in a dielectric barrier discharge plasma is investigated by the combination of kinetic modeling and experiments, as a case study for plasma-based gas purification. The influence of the specific energy deposition on the removal efficiency and the selectivity toward CO and CO2 is studied for different concentrations of ethylene. The model allows the identication of the destruction pathway in dry and humid air. The latter is found to be mainly initiated by metastable N2 molecules, but the further destruction steps are dominated by O atoms and OH radicals. Upon increasing air humidity, the removal efficiency drops by ±15% (from 85% to 70%), but the selectivity toward CO and CO2 stays more or less constant at 60% and 22%, respectively. Beside CO and CO2, we also identified acetylene, formaldehyde, and water as byproducts of the destruction process, with concentrations of 1606 ppm, 15033 ppm, and 185 ppm in humid air (with 20% RH), respectively. Finally, we investigated the byproducts generated by the humid air discharge itself, which are the greenhouse gases O3, N2O, and the toxic gas NO2.
E-info
https://repository.uantwerpen.be/docman/iruaauth/a8c485/63eba86b081.pdf
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