Detection of some stable species during the oxidation of methane by coupling a jet-stirred reactor (JSR) to cw-CRDS

Chiheb Bahrini (1) , Olivier Herbinet (1) , Pierre Alexandre Glaude (1) , Coralie Schoemaecker (2) , Christa Fittschen (2) , Frédérique Battin-Leclerc (1)

1 LRGP - Laboratoire Réactions et Génie des Procédés
2 PC2A - Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522

We present the coupling of a jet-stirred reactor to detection by cw-CRDS in the near infrared and first results obtained during the oxidation of methane. The mixture is rapidly expanded from the jet-stirred reactor into a 80 cm-long cw-CRDS cell maintained at a the pressure around 1.33 kPa, thus freezing the reaction and decreasing pressure broadening of the absorption lines. Some stable species (CH4, H2O and CH2O) have been quantified through their well structured spectra around 1506 nm, while H2O2 and HO2 radicals could not be detected.

Mots clés: cw-CRDS; jet-stirred reactor; methane; formaldehyde

Domaines: Chimie théorique et/ou physique

Chiheb Bahrini, Olivier Herbinet, Pierre Alexandre Glaude, Coralie Schoemaecker, Christa Fittschen, et al.. Detection of some stable species during the oxidation of methane by coupling a jet-stirred reactor (JSR) to cw-CRDS. Chemical Physics Letters, 2012, 534, pp.1-7. ⟨10.1016/j.cplett.2012.03.012⟩. ⟨hal-00726381⟩