Resonant Raman-scattering measurements of trichloroethene in a thermal boundary layer.
Concentration profiles of trichloroethene were measured in a boundary-layer flow over a heated ceramic surface. Raman scattering was excited with the fifth harmonic of a Nd:YAG laser at 213 nm. This wavelength took advantage of a resonance in the trichloroethene molecule to significantly enhance the C2HCl3 scattering cross section. The resonant Raman system was calibrated in a heated flow. The optical system was optimized so that measurements could be obtained close to the solid surface, normally a significant challenge for a spontaneous Raman-scattering setup. Measured concentrations indicated the lack of catalytic activity on a bare alumina surface. However, the results showed that a surface that was coated with Cr2O3-based zeolite was catalytically active.
Zhang
Yanda
Y
Department of Mechanical and Aeronautical Engineering, University of California-Davis, 95616, USA.
Kelly
Peter B
PB
Kennedy
Ian M
IM
D002516:Ceramics; D006358:Hot Temperature; D007834:Lasers; D008962:Models, Theoretical; D009994:Osmolar Concentration; D010084:Oxidation-Reduction; D010782:Photolysis; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman; D014241:Trichloroethylene / Q000032:analysis*
D014241:Trichloroethylene