Distribution of OH within silent discharge plasma reactors

Barrier discharges in humid air generate large quantities of OH and are well suited for the treatment of gas-based pollutants. In order to understand and optimize the formation and utilization of OH, we have imaged the spatial and temporal distribution of the OH radical with resolution of 40 /spl mu...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1996-02, Vol.24 (1), p.91-92
Main Authors: Coogan, J.J., Sappey, A.D.
Format: Article
Language:English
Subjects:
Air pollution
Air quality and air pollution
Applied sciences
Argon
Atmospheric pollution
Charge coupled devices
Chemical technology
Dielectrics
Electrodes
Electrons
Exact sciences and technology
Gases
Inductors
Optical filters
Oxygen
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma production and heating
Plasma sources
Plasmas
Pollution
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Summary:Barrier discharges in humid air generate large quantities of OH and are well suited for the treatment of gas-based pollutants. In order to understand and optimize the formation and utilization of OH, we have imaged the spatial and temporal distribution of the OH radical with resolution of 40 /spl mu/m and 100 ns. Using a flowing mix of Ar/O/sub 2//H/sub 2/O (78.5/20/1.5), we have found that OH exists only within the 85-/spl mu/m radius channel formed by the transient microdischarge. At modest power densities of 0.1 W/cm/sup 2/, over l0/sup 6//cm/sup 2//s of these small filaments quickly fill the entire reactor volume.
ISSN:0093-3813
1939-9375
DOI:10.1109/27.491706