Classical absorption and emission spectroscopy of barrier discharges in /NO and mixtures

By using emission and classical absorption spectroscopy with a continuum light source we have investigated dielectric barrier discharges in /NO and mixtures. The concentrations of NO, , , , and were measured inside the discharge and in the exhaust. In the discharge space resolved absorption spectroscopy was performed. In discharges with high content of NO or electron impact induced dissociation of NO and turned out to be important. In discharges in pure nitrogen we found emission from NO and O. This indicates a surface reaction of atomic nitrogen with chemisorbed oxygen and desorption of atomic oxygen. No indication for the presence of physisorbed NO was detected. A novel method for obtaining the electron distribution function from absolutely measured light intensities was applied and the results compared to solutions of the Boltzmann equation.

[1]  N. Bibinov,et al.  A comparative study of the electron distribution function in the positive columns in and /He dc glow discharges by optical spectroscopy and probes , 1998 .

[2]  C. Ferreira,et al.  Surface kinetics of N and O atoms in discharges , 1996 .

[3]  B. Jettkant,et al.  Spectroscopic density determination of nitrogen species in an ECR discharge , 1994 .

[4]  J. Lawler,et al.  High sensitivity absorption spectroscopy in glow discharge plasmas , 1993 .

[5]  Ulrich Kogelschatz,et al.  Nonequilibrium volume plasma chemical processing , 1991 .

[6]  U. Küchler,et al.  Microdischarges in air-fed ozonizers , 1991 .

[7]  Michael Hirth,et al.  Ozone synthesis from oxygen in dielectric barrier discharges , 1987 .

[8]  B. Eliasson,et al.  Electron impact dissociation in oxygen , 1986 .

[9]  S. Sander.  Temperature dependence of the NO3 absorption spectrum , 1986 .

[10]  Paul J. Crutzen,et al.  Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry: Supplement I CODATA Task Group on Chemical Kinetics , 1982 .

[11]  L. C. Lee,et al.  Quantitative absorption and fluorescence studies of NO between 1060 And 2000 a , 1981 .

[12]  H. Johnston,et al.  The photochemistry of the nitrate radical and the kinetics of the nitrogen pentoxide-ozone system , 1978 .

[13]  Hideo Okabe,et al.  Photochemistry of small molecules , 1978 .

[14]  T. Nakayama,et al.  Ionization Potential and Absorption Coefficients of Nitrogen Dioxide , 1959 .

[15]  F. F. Marmo.  Absorption Coefficients of Nitrogen Oxide in the Vacuum Ultraviolet , 1953 .