Barrier Discharges

Figure C2.13.3. Schematic illustrations of various electric discharges (a) DC-glow discharge, R denotes a resistor (b) capacitively coupled RF discharge, MN denotes a matching network (c), (d) inductively coupled RF discharge, MN denotes matching network (e) dielectric barrier discharge.

A special type of tlie RF discharge is tlie silent or dielectric barrier discharge [23] which can be operated at pressures... 

Kogeischatz U, Eiiasson B and Egii W 1995 Dieiectric barrier discharges. Principies and appiications J. Physique iV 7 C4 47-66... 

Dielectric barrier discharges (DBD) is the case in which a dielectric material is placed on the electrode surfaces. Similar to corona discharges, small-scale electron streamers are formed. In the DBD mode of operation, the threshold electric field... 

Effect of a dielectric barrier discharge (DBD) type non-thermal plasma on a synthetic gaseous reaction mixture... 

Figure 12.3. Electrode geometries for dielectric barrier discharges (A) planar electrode configuration (B) coaxial configuration (1 - electrodes 2 - dielectric).

Another computational model for the removal of nitrogen oxides in a pulsed dielectric barrier discharge was developed by Gentile and Kushner [75] for gas mixtures containing N2/02/H20 (85 5 10) and 500ppm NO. The results show that NO concentration decreases relatively fast in time, whereas the densities of the reaction products (HNOz,... 

Rudolph, R., Francke, K.P. and Miessner, H. (2002) Concentration dependence of VOC decomposition by dielectric barrier discharges, Plasma Chem. Plasma Process. 220, 401-12. 

Ma, H., Chen, P., Zhang, M., et al. Study of S02 removal using non-thermal plasma induced by dielectric barrier discharge (DBD), Plasma Chem. Plasma Process 21, 239-54. 

Takaki, K., Shimizu, M., Mukaigawa, S. et al. (2004) Effect of Electrode Shape in Dielectric Barrier Discharge Plasma Reactor for NOx Removal, IEEE Trans. PI. Sci. 32, 32-8. 

Jani, M.A., Toda, K., Takaki, K. el al. (2000) An experimental comparison between electrode shapes for NOx treatment using a dielectric barrier discharge, J. Phys. D Appl. Phys. 33, 3078-82. 

Takaki, K., Jani, M.A. and Fujiwara, T. (1999) Removal of nitric oxide in flue gases by multi-point to plane dielectric barrier discharge, IEEE Trans. Plasma Sci. 27, 1137—45. 

Chang, M.B., Kushner, M.J. and Rood, MJ. (1992) Gas-phase removal of NO from gas streams via dielectric barrier discharges, Environ. Sci. Technol., 26, 777-81. 

Daou, F., Vincent, A. and Amouroux, J. (2003) Point and multipoint to plane barrier discharge process for removal of NOx from engine exhaust gases Understanding of the reactional mechanism by isotopic labeling, Plasma Chem. Plasma Process 23, 309-25. 

Ravi, V., Mok, Y.S., Rajanikanth, B.S. et al. (2003) Temperature effect on hydrocarbon-enhanced nitric oxide conversion using a dielectric barrier discharge reactor, Fuel Processing Technology 81, 187-99. 

Dorai, R. and Kushner, M.J. (2001) Effect of multiple pulses on the plasma chemistry during the remediation of NOx using dielectric barrier discharges, J. Phys. D Appl. Phys. 34, 574-83. 

Dorai, R., Hassouni, K. and Kushner, M.J. (2000) Interaction between soot particles and NOx during dielectric barrier discharge plasma remediation of simulated diesel exhaust, J. Appl. Phys. 88, 6060-71. 

Mok, Y.S. and Huh, Y.J. (2005) Simultaneous removal of nitrogen oxides and particulate matters from diesel engine exhaust using dielectric barrier discharge and catalysis hybrid system, Plasma Chem. Plasma Process. 25, 625-39. 

Upadhyay et al. [98] used primarily correlated XPS and water contact angle measurements to study the surface degradation and recovery of amorphous films of a PMMA and a poly (aryl ether ether ketone) (PEEK). Surface modification of the films was carried out in a dielectric barrier discharge (DBD) unit, samples being treated with different dose levels of dielectric discharge. The modified (treated) samples were then stored for one month and re-examined. Figure 35 shows C(ls) and 0(1 s) XPS envelopes and their curve-fitting deconvolutions,... 

Jiang, T. et al., Plasma methane conversion using dielectric-barrier discharges with zeolite, Catal. Today, 72, 229, 2002. 

A disadvantage with conventional plasma treatment techniques is the requirement for treatments to take place in a vacuum, adding to the equipment costs. However, if a dielectric material is placed between the electrodes of the plasma equipment, then treatment can be performed at atmospheric pressure. This method is known as a dielctric barrier discharge treatment and has been the subject of some recently reported studies. 

Bente, M., Avramidis, G., Forster, S., Rohwer, E.G. and Viol, W. (2004). Wood surface modification in dielectric barrier discharges at atmospheric pressure for creating water repellent characteristics. Holz alsRoh- und Werkstoff, 62(3), 157-163. 

Rehn, P. and Viol, W. (2003). Dielectric barrier discharge treatments at atmospheric pressure for wood surface modification. Holz. als Roh- und Werkstoff, 61(2), 145-150. 

De Geyter N, Morent R, Leys C et al (2007) Treatment of polymer films with a dielectric barrier discharge in air, helium and argon at medium pressure. Surf Coat Technol 201 7066-7075... 

Spectral outputs of some typical metal halide lamps compared to that of the standard mercury lamp mercury barrier discharge lamp (a) mercury barrier discharge lamp, (b) iron additive lamp, and (c) gallium additive lamp. (Courtesy of American Ultraviolet Company.)... 

---