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29. OES analysis in a nonthermal plasma used for toxic gas removal: Rotational and excitation temperature estimation.

Author

Pacheco, M., Pacheco, J., Moreno, H., Mercado, A., Valdivia, R., and Santana, A.

Abstract

Nonthermal plasma technologies are often used for cleaning toxic gases. In this work, we will present an optical emission spectroscopy (OES) study in a dielectric barrier discharge (DBD) used to remove NO x specifically. Rotational temperatures are calculated from the UV-OH band ( A 2Σ, ν = 0 → X 2Π ν′ = 0) situated between 306–310 nm; for the rotational temperature, a fitting method was employed (comparison between experimental data with a synthetic molecular spectrum). Excitation temperatures were calculated using OII atomic lines situated in a wavelength range of 300–700 nm using a Boltzman’s plot method. From calculated temperatures, a thermal inequity characteristic of nonthermal plasma discharges has been high-lighted. The influence of the percentage of water added to the DBD reactor is also studied in the removal efficiency and in the OH band intensities and temperatures. [ABSTRACT FROM AUTHOR]

Published
2008
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