Nobel NOx and Voc Treatment Using Concentration and Plasma Decomposition

Stringent NOx and volatile organic compound (VOC) flue gas regulation was set force for various emission sources. The conventional emission control technologies such as SCR for NOx treatment and incineration and catalysts treatment for VOCs have limitations in terms of costs and performance. A novel economical and cost effective device is mandated to meet the regulation. A new approach consists of flue gas adsorption, desorption (concentration and adsorbent regeneration), followed by nonthermal plasma decomposition was developed. These hybrid processes make the flue gas volume order of magnitude small, resulting in the reduction of the energy cost, reactor size and power supply. This concept was applied for NOx, various VOCs and hazardous air pollutants treatment. More than 90% of NOx and VOCs reduction was achieved using a series of surface discharge units. The energy efficiencies of 3.35 g(NO₂)/kWh for NOx and 34.2 g/kWh for toluene were achieved using concentration technique, followed by surface discharge plasma reactor. This process results one order of magnitude energy and cost effective, compared with the continuous low concentration plasma treatment.