Effect of CO2 and water vapors on NOx removal efficiency under conditions of DC corona discharge in cylindrical discharge reactor

Citation
R. Gasparik et al., Effect of CO2 and water vapors on NOx removal efficiency under conditions of DC corona discharge in cylindrical discharge reactor, JPN J A P 1, 39(1), 2000, pp. 306-309
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
39
Issue
1
Year of publication
2000
Pages
306 - 309
Database
ISI
SICI code
0021-4922(200001)39:1<306:EOCAWV>2.0.ZU;2-4
Abstract
Carbon dioxide (CO2) and water vapors effects on NOx removal efficiency was studied in the wire-cylinder discharge reactor utilizing a DC power supply . The content of CO2 in both wet and dry aired initial gases was 0%, 5%, 10 %, 15% and 20%, respectively. NOx treatment efficiency strongly depended on a DC positive corona discharge mode, which changed with CO2 concentration regardless the water content. A glow mode of corona discharge, established when the concentration of CO2 in the initial gas was 0% and 5%, exhibited v ery low removal efficiency (removal rate tinder 10% and energy yield about 1.1 NO g/kWh). In the cases of 10%-, 15%- and 20%-content-of-CO2 input gas, the glow corona mode was transferred into a streamer for both wet and dry initial gases. Therefore, the removal efficiency dramatically enhanced-the most efficient treatment was achieved when 15% of CO2 was included in the i nitial gas (5.1 NO E/kWh for wet gas and 4.8 NO g/kWh for dry gas). Water v apors played an important role in NO2 removal via the mutual reaction formi ng HNO3. Therefore, in the wet-air supplied reactor the highest removal rat es of NOx were as high as 48%, while in dry-air supplied reactor only 15%.