Research On Optimizing Dielectric Barrier Discharge Reactor And The Using For NO Reduction

NO as one of the main air pollutants can cause acid rain and photochemistry fog, endanger the humanity as well as ecological environment. NO is ministry of environmental criteria pollutant and contribute significantly to urban air pollution. Comparing with the conventional DeNOx technologies, non-thermal plasma (NTP) shows more advantages, such as faster reaction rate, lower energy cost and less secondary pollutants. This thesis was conducted to evaluate influencing factors of a dielectric barrier discharge (DBD) reactor in the destruction of Nitric Oxide (NO), a common by-product of stationary combustion sources.This thesis is organized into several sections. The literature review describes the NO problem and background of DBD plasma reactors and their application on NO removal. The theory section describes the mechanisms of plasma formation and reaction and various equations used to determine power consumption.Following these sections, the procedure portion will describe the process variables examined and the materials and methods used to analyze the process. The results and discussion section will present findings and assess of the effects of the operational parameters and geometry of reactor on NO conversion. The results and discussion section will be declared in four sections:effects of characteristics plasma power, effects of geometry of reactor, effects of operational parameters, effects of dielectric materials and filling mode. Finally, the overall success of the research and suggestions for further investigations will be presented in the summary section.(1) Compared to glass and corundum material, quartz material were more suitable to be used as dielectric layer of DBD reactor.(2) There were optimal discharge gap and the discharge length for DBD reactor, at which the best NO conversion was abtained.(3) Introducing the dielectric pellet (catalytic and non-catalytic)into discharge area is possible to reduce the energy cosumption of the DBD reactor.(4) The NO conversion of cycled adsorption-NTP desorption and decomposition was more than95%, while the generation of NO2and energy consumption were reduced.