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Ultraviolet and visible fluorescence in the fuel pyrolysis regions of gaseous diffusion flames

✍ Scribed by F. Beretta; V. Cincotti; A. D'Alessio; P. Menna

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 525 KB
Volume: 61
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(85)90102-6

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✦ Synopsis

Fluorescence measurements have been made from the fuel region of methane and ethylene diffusion flames employing the more intense uv lines of a high pressure mercury lamp (250, 310, 334,365,405, and 436 nm) and the blue and green lines of an argon ion laser (488 and 514.5 nm).

The collected spectra exhibited remarkable different features when the excitation wavelengths were moved from uv to visible. An identification of individual PAH responsible for the fluorescence was attempted on the basis of the relative abundance in combustion systems and their spectroscopic properties, namely, excitation and emission spectra and quantum efficiency.

The measurements carried out inside ethylene flame indicate that the relative distribution of PAH is similar although the absolute amount was much higher.

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