Application of Non-Thermal Plasma for NOx Reduction in the Flue Gases

Rolandas Paulauskas, Indrek Jõgi, Nerijus Striūgas, Dainius Martuzevičius, Kalev Erme, Jüri Raud and Martynas Tichonovas
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Rolandas Paulauskas: Faculty of Chemical Technology, Kaunas University of Technology, Radvilenu road 19, LT50254 Kaunas, Lithuania
Indrek Jõgi: Laboratory of Plasma Physics, Institute of Physics, University of Tartu, W. Ostwaldi st. 1, 50411 Tartu, Estonia
Nerijus Striūgas: Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos st. 3, LT44403 Kaunas, Lithuania
Dainius Martuzevičius: Faculty of Chemical Technology, Kaunas University of Technology, Radvilenu road 19, LT50254 Kaunas, Lithuania
Kalev Erme: Laboratory of Plasma Physics, Institute of Physics, University of Tartu, W. Ostwaldi st. 1, 50411 Tartu, Estonia
Jüri Raud: Laboratory of Plasma Physics, Institute of Physics, University of Tartu, W. Ostwaldi st. 1, 50411 Tartu, Estonia
Martynas Tichonovas: Faculty of Chemical Technology, Kaunas University of Technology, Radvilenu road 19, LT50254 Kaunas, Lithuania

Energies, 2019, vol. 12, issue 20, 1-13

Abstract: Over the years, ever more stringent requirements on the pollutant emissions, especially NO X , from combustion systems burning natural gas are introduced by the European Union (EU). Among all NO X reduction methods, the flue gas treatment by plasma is widely applied and could be used for both small scale and domestic combustion systems. However, the removal efficiency depends on concentrations of oxygen, water vapor, traces of hydrocarbons, and nitrogen oxides in flue gas. In order to analyze the application of the NO X reduction for small-scale or domestic combustion systems, experiments of NO X reduction by non-thermal plasma from real flue gases originating from premixed methane combustion at different equivalence ratio (ER) values were performed. It was determined that the residual oxygen in flue gas plays an important role for improvement of NO to NO 2 oxidation efficiency when O 2 concentrations are equal to or higher than 6%. The power consumption for the plasma oxidation constituted approximately 1% of the burner power. In the case of ozone treatment, the addition of O 3 to flue gas showed even more promising results as NO formed during combustion was fully oxidized to NO 2 at all ER values.

Keywords: non-thermal plasma; dielectric barrier discharge; premixed flame burner; combustion; flue gas; NOx removal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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