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Laser-Induced Fluorescence Measurements of Formaldehyde in a Methane/Air Diffusion Flame.


pdf icon Laser-Induced Fluorescence Measurements of Formaldehyde in a Methane/Air Diffusion Flame. (603 K)
Harrington, J. E.; Smyth, K. C.

Chemical Physics Letters, Vol. 202, No. 3-4, 196-202, January 22, 1993.

Keywords:

diffusion flames; formaldehyde; lasers; fluorescence

Abstract:

Laser-induced fluorescence has been observed from the formaldehyde electronic transition in a well characterized, laminar methane/air diffusion flame burning at atmospheric pressure. This represents the first optical measurement in flames of naturally occurring formaldehyde, an important intermediate in the oxidation of hydrocarbons. Both 355 nm and tunable dye laser excitation of fluorescence are demonstrated. The observed fluorescence signals are corrected for partition function effects and for estimated collisional quenching rates to obtain relative concentration profiles.