Experimental study on the optimization of dielectric barrier discharge reactor for no x treatment p. The computed eairgap is close to the dielectric strength in air, i. Ozone synthesis in the discharge with pulse supply. Dielectricbarrier discharges silent discharges combine the ease of atmospheric pressure operation with nonequilibrium plasma conditions suited for many plasma chemical processes. Carbon dioxide splitting in a dielectric barrier discharge plasma. Characterization of a dielectric barrier discharge dbd for waste gas treatment 1. In the reverse half of the cycle, electrons are supplied by surface discharges on the dielectric and move toward the metal electrode. The purpose of this paper is to study and design a nonthermal dielectric barrier discharge generator generated by a dc power supply, by designing two different geometries of the electrode. Modeling of dielectric barrier discharge plasma actuator balaji jayaraman, youngchang cho and wei shyy department of aerospace engineering university of michigan, ann arbor, mi 48109 glow discharge at atmospheric pressure using a dielectric barrier discharge can induce fluid flow, and operate as an actuator for flow control. Effect of dielectric and liquid on plasma sterilization. Pdf dielectric barrier discharge control of a turbulent. Dielectric barrier and corona discharges plasma school. The reactor operating conditions for the desired reaction have been calculated using the dissociation of water molecules as a model reaction.
It generates a visually diffuse plasma with a high power density in the immediate. Co2 dissociation studies in dielectric barrier discharges. Numerical optimization research on the dielectric barrier. In order to overcome these problems, a single species dbd model for a point to plane configuration is presented in this paper. Dielectric barrier discharge indiumtin oxide dc magnetron xray photoelectron spectroscopy aluminumdoped zinc oxide azo is a material that can have high electrical conductivity while being highly transparent at the same time. Carbon dioxide splitting in a dielectric barrier discharge. Electrical characteristics and modeling of a filamentary. Ghomi university of shahid beheshti laser and plasma research institute, tehran, iran m. A numerical investigation of dielectric barrier discharge aimed to simulate the electro hydro dynamic interaction is presented. The discharge system is working in open air at atmospheric pressure. Shukrullah 1 department of mechanical engineering, universiti teknologi petronas. Crookes developed the tube named after him to study uorescence phenomena and electrical discharges g. The most efficient method to get cold plasma at atmospheric pressure is dielectric barrier dischargedbd.
Nari enhanceddielectricbarrierdischargebodyforcegeneraonusing. A dielectric barrier discharge plasma reactor has been designed and constructed. Another principle for the treatment of web and fabrics is based on the socalled diffuse coplanar surface barrier discharge see figure 6c. The discharge characteristics dependence upon dielectric material and applied voltage are simulated and the ehd. Role of surface vs gas phase dynamics a interaction between filaments b diffuse discharges v. Flatbed, jet and handhold versions of sdbd plasma generators provide the required. Dielectric barrier discharge, ozone generation, and their. Filamentary mode and homogeneous dbd mode of discharge were studied.
Help us write another book on this subject and reach those readers. The effects of packing materials were investigated in terms of discharge characteristics, removal efficiency and byproducts formation. Co and byproduct formation during co2 reduction in. Co2 dissociation studies in dielectric barrier discharges f. Basics and biomedical applications of dielectric barrier. Chemical and electrical diagnosis of two configurations of dielectric barrier discharges applied to nitric oxides degradation n. Physical chemistry of the barrier discharg dvs media. Kushner university of illinois deparment of electrical and computer engineering. Intensity control of dielectric barrier discharge filaments. The electrical dynamics of dielectric barrier discharges technische. Characteristics of microdischarge depend on electrode. Influence of plasma dielectric barrier discharge on oligomerization of carbon monoxide was shown. Electrical characteristics and modeling of a filamentary dielectric barrier discharge in atmospheric air ciri elektrik dan model suatu nyahcas dielektrik berpenghadang dalam udara atmosfera w.
Keywords wind turbine aerodynamics dielectric barrier discharge dbd plasma actuation active. Intensity control of dielectric barrier discharge filaments by matthew crawford paliwoda a thesis presented to the faculty of the graduate school of the missouri university of science and technology in partial fulfillment of the requirements for the degree master of science in aerospace engineering 2016 approved by joshua l. This study has been carried out by measuring current and voltage with a high frequency digital oscilloscope. Electrostatic analysis of dc discharge phenomena in air. Intracellular electric fields produced by dielectric. The dielectric barrier consisted of two glass slabs, which cover both reactor electrodes. Dielectricbarrier discharges silent discharges are nonequilibrium discharges that can be conveniently operated over a. Experimental study of acetone removal by packedbed. This is not required in radio frequency and microwave discharges. Limiting the migration of bisphenol a from polycarbonate. The discharge is a transient diffused glow at low frequency alternating voltage 60 hz and changes to a. Dielectric barrier discharge control of a turbulent boundary layer in a supersonic flow article pdf available in applied physics letters 974. Electrical characterization of dielectric barrier discharge. Mohan sankaran, daniel lacks case western reserve university, u.
Numerical investigation on the effects of dielectric barrier on a. Co and byproduct formation during co 2 reduction in dielectric barrier discharges f. Time evolution of the electron current extraction from the mdbd in 1atm n2 at 10 mhz log scale, cm. Pdf dielectricbarrier discharges silent discharges are used on a large industrial scale. Once again, the applied voltage varied up to 23 kv and the total flow rate was maintained at 100 mlmin. Concearning the stability and enhancement the role of dielectric barrier discharge dbd in medical applications, i would like to ask about the more effected type of used dielectric materials in. The discharge is taking place in normal atmospheric air, at about 30 khz, with a discharge gap of about 4 mm. Study on no conversion characteristics in dielectric. Numerical optimization research was made for the dielectric barrier discharge dbd reactor for nox removal in order to improve the efficiency of the dbd reactor. Characterization of a dielectric barrier discharge dbd.
Methanol production in ac dielectric barrier discharge. Chemical and electrical diagnosis of two configurations of. Study on no conversion characteristics in dielectric barrier discharge process. Brooks, alex fridman, and haifeng ji department of chemistry, drexel university, philadelphia, pennsylvania 19104, united states. Discharge structure and microdischarge properties dielectricbarrier discharges are characterised by the presence of one or more insulating layers in the current path between metal electrodes in addition to the discharge space. Modeling of dielectric barrier discharge plasma actuator. Dielectric barrier discharge dbd plasma pretreatment of lignocellulosic materials in air at atmospheric pressure for their improved wettability. Dielectric barrier discharge, ozone generation, and their applications complex plasmas summer institute 2008 jose l. Sdbd plasma for disinfection sdbd plasma tnos cold atmosphericpressure sdbd surface dielectric barrier discharge plasma can be tailormade for cleaning, activation, coating deposition and disinfection of plastics, glass, ceramics and metals. Characterization of an inhouse built 50 hz single dielectric barrier discharge system having asymmetric electrodes m.
In this paper, several designs of dielectric barrier discharge dbd plasma actuators are presented for aerospace applications and the focus is. Oligomerization of carbon monoxide in plasma of the. A dielectric barrier discharge produced using mica sheets as dielectric, put on two steel plates as electrode. A pedagogical study of aerodynamic feedback control by. The nanosecond pulsed dielectric barrier discharge nsdbd in high pressure air produces nonequilibrium plasma. The identification of organic byproducts was conducted.
Characterisation of a dielectric barrier discharge with a square mesh. As a result, the breakdown strength of reactor was 44. Different planar or cylindrical configurations are common fig. Wong abstract the electrical characteristics of a filamentary dielectric barrier discharge dbd are studied experimentally and. One is a planar electrode model, and the other is a plasma jet model. Degradation of glucocorticoids in water by dielectric barrier discharge and dielectric barrier discharge combined with calcium peroxide. Abstractdielectric barrier discharge dbd is the electrical discharge between the electrodes in the presence of an insulating barrier. Dielectric barrier discharge dbd plasma pretreatment of. The discharge duration of the first current pulse in half cycle of different voltage polarity is same in discharge if the two electrodes temperatures are same. Plasma sterilization offers a faster, less toxic and versatile alternative to conventional sterilization methods. Single dielectric barrier discharge plasma enhanced. Degradation of glucocorticoids in water by dielectric barrier. In this paper, the optimization method proposed by our studying team was adopted to carry out the numerical optimization research on the discharge gap of the reactor.
Lopez saint peters college department of applied science and technology physics division jersey city, new jersey usa. Performance characterization and quantification of. Glowarc discharge mode was also studied by means of electrical characterization without using the dielectric barrier between the electrodes. Experimental study of lowpressure nitrogen dielectric. Using a relatively small, low temperature, atmospheric, dielectric barrier discharge surface plasma generator, we achieved. Residence time investigation in a coaxial dielectric. Lee, wonseok jung, jaewoo chung, yuri choi, moohyun cho, and won namkung. Rahimzadeh amirkabir university of technology department of mechanical engineering, tehran, iran s. The dbd discharge has been generated in planar geometry reactor powered by ac voltage provided by conventional high voltage transformer. By this method, which has application area at industry, non.
A discharge drift diffusive model according to the townsend avalanche is described and used to duplicate the plasma kinetics of a dbd actuator. Direct nonoxidative methane conver sion by dielectric. The treatments are carried out at low discharge powers \1. It has been used in many applications such as displays, mobile devices and solar cells. Valine under nonthermal dielectric barrier discharge plasma yingying li, arben kojtari, gary friedman, ari d. Problems of the active power definition in the barrier 163 discharge with dielectric of high specific capacity. Characteristics of dielectric barrier discharge reactor. In this study, doublelayered solid dielectric barriers and planeplane electrode system are used to examine the dc discharge characteristics of air under atmospheric pressure. In most gases at this pressure the discharge consists of a large number of randomly distributed shortlived microdischarges. But it becomes different if the two electrodes have different temperatures. The discharge moment is always ahead when the low temperature electrode is an instantaneous cathode. Dielectric barrier discharge is used as a cheap technique for surface treatment of polycarbonate. In this study, a packedbed dielectric barrier discharge dbd reactor was developed for acetone removal. Ing andreas schulz institute of interfacial process engineering and.
Direct nonoxidative methane conversion by dielectric barrier discharge a modeling study xiaozhou shen, joseph toth, r. The electrical and spectral characteristics of a dielectric barrier discharge dbd are experimentally investigated in a sealed off coaxial cylinder. This paper features the pulse polarity effect on ozone generation efficiency by adjusting the applied voltage and the flow rate in a coaxial dielectric barrier discharge reactor. Publishers pdf, also known as version of record includes final page. Institute of interfacial process engineering and plasma technology characterization of a dielectric barrier discharge dbd for waste gas treatment examiner. Pohang university of science and technology chinju. Siemens introduced dielectric barrier discharge for ozone production in 1857, but rst sistematic studies about ionized gases were undertaken a couple of decades later, when j. Characteristics of dielectric barrier discharge ozone. Pdf dielectric barrier discharges dbds are plasmas generated in configurations with an insulating dielectric material between the.
Wanget al electron current from an rf microdielectric barrier discharge 2169 fig. Electron current from an rf microdielectric barrier discharge. Dielectric barrier discharge plasma reactor springerlink. Dielectricbarrier discharge dbd is the electrical discharge between two electrodes separated by an insulating dielectric barrier. Experimental study on the optimization of dielectric. For a single dielectric barrier discharge, during onehalf of the ac cycle, electrons leave the metal electrode and move towards the dielectric where they accumulate locally. Ozone and nitrogen oxides synthesis, energy 161 consumption. They combine the advantages of nonequilibrium plasma.
Basics and biomedical applications of dielectric barrier discharge dbd, biomedical engineering, trends in materials science, anthony n. Quasistationary numerical model of the dielectric barrier. We propose a mechanism to explain many features of the multifilament dielectric barrier discharge. Simultaneous remediation of no x and oxidation of soot using dielectric barrier discharges rajesh dorai and mark j.
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