Experimental study on the optimization of dielectric barrier discharge reactor for NO<inf>x</inf>treatment

Abstract

In this paper, a comprehensive study of a DBD reactor is conducted to investigate the optimum operating conditions of the reactor for NOx treatment. For each parameter, the objective is to find the maximum NOx removal efficiency with the minimum consumed power. Different effective parameters of the reactor i.e. electrode length and diameter, electrode and dielectric materials as well as parameters of power generator, i.e. voltage and frequency, are investigated. The results show that for this configuration, the electrode with 20 cm length and 10 mm diameter has the best performance. Aluminum as the inside electrode material and quartz as the dielectric material are selected. Furthermore, the optimum value for the pulse frequency is 16.6 kHz. For the mentioned optimum conditions, the NOx removal efficiency achieved is equal to almost 82% at the input power of 486 W. Furthermore, the highest achieved NOx removal is almost 92% at the input power of 864 W. The results of this paper can be used to reduce the energy consumption of NTP systems to acceptable levels.

Study on the Effect of Structure Parameters on NO Oxidation in DBD Reactor under Oxygen-Enriched Condition

“…Sci. 2020, 10, x FOR PEER REVIEW 6 of 16 It is worth noticing that the oxidation degree of NOX rises first and then shows a decline trend with the increase of SED under oxygen-enriched condition, which is different from the NOX removal efficiency behavior under the condition of non-oxygen [19].…”

“…The experimental results show that increasing the electrode diameter can obtain higher oxidation degree of NO X and reduce the energy consumption of DBD reactor. Increasing inner electrode diameter can reduce the gas gap of DBD reactor, which promotes the E/N of gas gap with the same supply voltage [16,19]. As E/N increases, the mean electron energy increases as well; thus, increasing the inner electrode diameter makes it easier for DBD reactor to generate O radicals and promote NO oxidation.…”

“…The VDBD reactor was widely used for the treatment of NO X and SO X . The structure parameters of DBD reactor have great impact on NO removal efficiency and energy consumption, which has become a research hotspot [14][15][16][17][18][19]. For SOX removal, wet scrubbing can achieve a higher removal efficiency (more than 95%), while, for NOX removal, wet scrubbing has a low removal efficiency.…”

“…The VDBD reactor was widely used for the treatment of NOX and SOX. The structure parameters of DBD reactor have great impact on NO removal efficiency and energy consumption, which has become a research hotspot [14][15][16][17][18][19].…”

“…In 2015 and 2016, Anaghizi and Talebizadeh et al used the mixture of NO and N 2 as the simulated diesel exhaust. The effects of electrode length, electrode material and electrode diameter on NO removal were studied [18,19].…”