The Configuration Effects of Electrode on the Performance of Dielectric Barrier Discharge Reactor for NO_{<italic>x</italic>} Removal

Abstract

In this paper, a dielectric barrier discharge cylindrical reactor has been analyzed in order to increase the efficiency of nitrogen oxide (NO x ) removal from the simulated gas under the room temperature. The effects of electrode shape as well as electrode diameter and electrode length are investigated in the nonthermal plasma reactor. Two different electrode configurations (rod and screw thread electrodes) are examined. The experimental result shows that for the rod electrode, NO x removal efficiency is enhanced by increasing the electrode diameter. However, the screw thread electrode is more effective in decreasing NO x concentration. Finally, the results showed that the average input power requirement for NO x removal can be reduced almost 14% using a 1-mm screw thread electrode instead of a rod electrode.Index Terms-Dielectric barrier discharge (DBD) reactor, electrode configuration, NO x removal, nonthermal plasma (NTP), rod electrode, screw thread electrode.

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

“…1-a and 1-b, respectively. The setup consists of the DBD reactor, high voltage pulse power generator, gas feeding system and the measurement system [25]. The plasma reactor used in the present study is a DBD reactor, which is shown in Figure 1b.…”

“…The other gas components of NOx cylinder are N2, H2O, N2O, and CO2. The amount of each gas contained in the NOx cylinder can be found in [25]. The gas system was sealed precisely in order to prevent any gas leakage from the joints and tubes [14].…”

“…Furthermore, the increase of electrode length increases the gas residence time. Therefore, the gas is under the plasma state for more time to the plasma and more NOx can be removed from the exhaust gas [25,40]. However, increasing the NOx removal efficiency is due to the increase in the electrical energy consumption.…”

One-Dimensional Simulation of Synergistic Desulfurization and Denitrification Processes for Electrostatic Precipitators Based on a Fluid-Chemical Reaction Hybrid Model

“…The transport equation of electron and electron energy in the fluid model is obtained from a two-order approximate solution of the Boltzmann Equation [17], as shown in Equations (1) and (2):…”

“…The electron energy usually comes from the acceleration of electrons by an external electric field. Recent studies have shown that NTP has good performance for the removal of gaseous pollutants such as NO and SO 2 [1][2][3], and industrial demonstration applications have been carried out because of its compact structure and high energy-efficiency [4,5]. Gas discharge at atmospheric pressure is the most common form of NTP used for flue gas treatment, such as corona discharge, dielectric barrier discharge, and so on [6,7].…”