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Influence of humidity on photochemical ozone generationwith 172 nm xenon excimer lamps

Published online by Cambridge University Press:  17 April 2009

M. J. Salvermoser ,
U. Kogelschatz  and
D. E. Murnick
M. J. Salvermoser*
Affiliation:
Scientific Advisor to UV Solutions, Newark, NJ 07103, USA
U. Kogelschatz
Affiliation:
Retired from ABB Corporate Research, 5405 Baden, Switzerland
D. E. Murnick
Affiliation:
Department of Physics, Rutgers University, Newark, NJ 07102, USA
*
[email protected]
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Abstract

The reaction kinetics of photochemical ozone (O3) generation in humid air and oxygen (O2) using efficient, narrow band vacuum ultra violet (VUV) 172 nm xenon excimer lamps is discussed. Trace amounts of water (H2O) vapor in the process gas leads to hydroxyl (OH) and hydroperoxy (HO2) radical formation. These radicals drive a catalytic O3 destruction cycle limiting O3 saturation concentration. This catalytic O3 destruction cycle was included into a quantitative kinetic model describing photochemical O3 production. Experimental O3 saturation concentrations obtained with coaxial VUV driven photochemical O3 generators compare satisfactorily with the models predictions.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 47 , Issue 2: 11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI) , August 2009 , 22812
Copyright
© EDP Sciences, 2009

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