Resonant Raman-scattering measurements of trichloroethene in a thermal boundary layer

Yanda Zhang; Peter B. Kelly; Ian M. Kennedy

Resonant Raman-scattering measurements of trichloroethene in a thermal boundary layer

Yanda Zhang, Peter B. Kelly, Ian M. Kennedy

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

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 trichioroethene 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.

Original language	English (US)
Pages (from-to)	2962-2972
Number of pages	11
Journal	Applied Optics
Volume	41
Issue number	15
State	Published - May 20 2002

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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N2 - 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 trichioroethene 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.

AB - 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 trichioroethene 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.

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Resonant Raman-scattering measurements of trichloroethene in a thermal boundary layer

Abstract

ASJC Scopus subject areas

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