✦ LIBER ✦

Multiphoton ionization of methyl radicals in CH4 pyrolysis

✍ Scribed by Mau-Song Chou

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 225 KB
Volume: 114
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(85)80913-1

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✦ Synopsis

The technique of resonance enhanced multiphoton ionization has been applied to in situ detection of methyl radicals in high-temperature atmospheric pressure CH, pyrolysis. The detection is via three-photon ionization using two-photon resonances to the 3p *A;' state 'of CH; at 333.5 and 329.5 nm for the 0: and 2: bands, respectively. Deuterium isotope shifts in both bands are also observed in CD4 pyrolysis. The detection sensitivity is estimated to be at the ppm level. The methyl radical concentration profiles are measured as a function of reaction time.

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