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