Non-intrusive detection of methanol in gas phase using infrared degenerate four-wave mixing

摘要: Sensitive and non-intrusive detection of gas-phase methanol with high spatial temporal resolution has for the first time been reported using mid-infrared degenerate four-wave mixing (IR-DFWM). IR-DFWM spectra have successfully recorded in nitrogen-diluted gas flows at room temperature 300 A degrees C, by probing ro-vibrational transitions belonging to fundamental C-H stretching modes, nu (2) (9), O-H mode, (1). The limit vapor atmospheric pressure is estimated be 250 ppm present setup. Potential interference from CH4 CO2 discussed CO2, it was found that free possible. These results show potential applications both combustion catalytic environments, such as hydrogenation oxidation. (Less)