Radical density measurement at low-pressure discharge denitrification by appearance mass spectrometry

K. Ito, K. Hagiwara, H. Nakaura, H. Tanaka, K. Onda

Research output: Contribution to journalArticle

Abstract

In discharge denitrification, radical production by electron collision with combustion gas is a key process which determines the denitrification process and its performance. In this study N, O, OH and H radical densities have been measured by appearance mass spectrometry in a low-pressure discharge field with parallel electrodes (2 cm gap) under simulated combustion gas flow. Also, electric field, electron number density and electron temperature at the radical sampling position have been measured by the Langmuir probe method. Under constant discharge pressure the radical density (cm-3) was about 1011 -1012 cm-3 and the density increased with increasing the discharge current. Under constant discharge current, both the radical concentration [-] and electron temperature increased with decreasing pressure. The radical concentration in the cathode fall region was greater than that for the outer region. Additionally, we measured the concentration change of NO mixed in the simulated combustion gas and observed a little change of the NO concentration.

Original languageEnglish
Pages (from-to)1472-1476
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number3 A
Publication statusPublished - Mar 1 2001

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Denitrification
Mass spectrometry
mass spectroscopy
low pressure
Electron temperature
Langmuir probes
Electrons
Gases
Flow of gases
Cathodes
Electric fields
electron energy
Sampling
Electrodes
electrostatic probes
gases
gas flow
electron scattering
cathodes
sampling

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Radical density measurement at low-pressure discharge denitrification by appearance mass spectrometry. / Ito, K.; Hagiwara, K.; Nakaura, H.; Tanaka, H.; Onda, K.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 40, No. 3 A, 01.03.2001, p. 1472-1476.

Research output: Contribution to journalArticle

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