Disturbance of laser-induced-fluorescence measurements of NO in methane-air flames containing chlorinated species by photochemical effects induced by 225-nm-laser excitation.

Laser-induced fluorescence measurements of NO in CH(4)-air flames seeded with CH(3)Cl and CH(2)Cl(2) are described. The measurements are perturbed by strong photochemical effects characterized by UV emissions. The contribution of these background emissions is taken into account on the basis of an on-line-off-line resonance procedure. First results indicate an important increase of NO in the presence of chlorinated species. Background emissions observed in the range 220-260 nm and at 278 nm are ascribed, respectively, to electronically excited HCl and CCl photofragments. It is shown that C(2)H(3)Cl and CHCl(2) species are responsible for the formation of HCl and CCl, respectively, and a photolytic mechanism for formation of the photofragments is proposed.

[1]  N. Laurendeau,et al.  Experimental assessment of O(2) interferences on laser-induced fluorescence measurements of NO in high-pressure, lean premixed flames by use of narrow-band and broadband detection. , 1996, Applied optics.

[2]  A. Hirano,et al.  Two-dimensional quenching lifetime measurement of OH:A2Σ+(υ′ = 1) and NO:A2Σ(υ′ = 0) in atmospheric-pressure flames , 1996 .

[3]  C. Koshland.  Impacts and control of air toxics from combustion , 1996 .

[4]  P. Desgroux,et al.  CH3 detection in flames using photodissociation-induced fluorescence , 1996 .

[5]  U. Meier,et al.  Laser-induced fluorescence thermometry and concentration measurements on NOA–X (0-0) transitions in the exhaust gas of high pressure CH4/air flames , 1995 .

[6]  R. Hanson,et al.  Laser-induced fluorescence measurements of NO and OH mole fraction in fuel-lean, high-pressure (1–10 atm) methane flames: Fluorescence modeling and experimental validation , 1995 .

[7]  Richard A. Yetter,et al.  Kinetic interactions of CO, NOx, and HCI emissions in postcombustion gases , 1995 .

[8]  M. Castaldi,et al.  Chemical Structures of Fuel-Rich, Premixed, Laminar Flames of 1, 1- C2H4Cl2/CH4/O2/Ar , 1995 .

[9]  J. Werner,et al.  An Extended Flame Zone in the Combustion of CH3Cl , 1995 .

[10]  M. Thomson,et al.  An experimental and numerical study of the high-temperature oxidation of 1,1,1-C2H3Cl3☆ , 1994 .

[11]  P. Desgroux,et al.  A comparison of ESR and LIF hydroxyl radical measurements in flame , 1994 .

[12]  Kei Sato,et al.  The photodissociation dynamics of dichloroethenes at 214 and 220 nm , 1993 .

[13]  C. Carter,et al.  Laser-Saturated Fluorescence Measurements of Nitric Oxide in Laminar, Flat, C2H6/O2/N2 Flames at Atmospheric Pressure , 1993 .

[14]  B. A. Williams,et al.  Resonance ionization spectroscopy of the chloroethylenes , 1993 .

[15]  M. Kawasaki,et al.  Mechanism of the ultraviolet photodissociation of chloroethylenes determined from the Doppler profiles, spatial anisotropy, and power dependence of the photofragments , 1992 .

[16]  C. McEnally,et al.  The detection of ethyl chloride using photofragmentation , 1992 .

[17]  J. Jeffries,et al.  Detection of chlorinated hydrocarbons via Laser-atomization/Laser-induced fluorescence , 1992 .

[18]  Charles H. Kruger,et al.  Arrays of radiative transition probabilities for the N2 first and second positive, no beta and gamma, N+2 first negative, and O2 Schumann-Runge band systems , 1992 .

[19]  J. Jeffries,et al.  LIF measurements in methane/air flames of radicals important in prompt-NO formation , 1992 .

[20]  C. Koshland,et al.  Detection of chlorinated hydrocarbons in combustion using in situ FTIR spectroscopy , 1992 .

[21]  R. Gordon,et al.  PRODUCT STATE DISTRIBUTION IN THE PHOTODISSOCIATION OF VINYL CHLORIDE AT 193 NM , 1991 .

[22]  W. Forst,et al.  Ultraviolet absorption spectra of the CH2Cl and CHCl2 radicals and the kinetics of their self-recombination reactions from 273 to 686 K , 1991 .

[23]  J. Jeffries,et al.  Laser-induced fluorescence of O(3p(3)P), O(2), and NO near 226 nm: photolytic interferences and simultaneous excitation in flames. , 1989, Optics letters.

[24]  S. Arepalli,et al.  Resonantly enhanced two‐photon spectroscopy of HCl and DCl in the 77 000–87 000 cm−1 region , 1987 .

[25]  Stephen R. Leone,et al.  Time-resolved FTIR photofragment emission spectroscopy: HCl vibrational distributions from the 193 nm photolysis of chloroethylenes , 1986 .

[26]  S. Senkan,et al.  Chemical Structure of Fuel-Rich 1,2-C2H4Cl2/CH4/O2/Ar Flames: Effects of Micro-Probe Cooling on the Sampling of Flames of Chlorinated Hydrocarbons , 1986 .

[27]  F. Stuhl,et al.  Cl2 and HCl emissions in the ArF‐laser photolyses of chlorinated compounds: Identification and mechanism of generation , 1986 .

[28]  J. Nee,et al.  Quantitative photoabsorption and fluorescence study of HCl in vacuum ultraviolet , 1986 .

[29]  U. Nagashima,et al.  Photofragmentation of mono‐ and dichloroethylenes: Translational energy measurements of recoiling Cl and HCl fragments , 1985 .

[30]  M. Castillejo,et al.  Xenon halide exciplex formation by 193 nm laser multiphoton dissociation of vinyl halides in the presence of Xe , 1985 .

[31]  D. S. Ginter,et al.  Electronic spectra and structure of the hydrogen halides: Characterization of the electronic structure of HCl lying between 82 900 and 93 500 cm−1 above X1Σ+ , 1981 .

[32]  J. D. Mcdonald,et al.  Infrared emission spectroscopy of the products of UV‐dissociated chloroethylenes , 1981 .

[33]  J. Tiee,et al.  UV laser photochemistry of CCl4 and CCl3F , 1980 .

[34]  A. Douglas,et al.  The electronic spectra of HCl and HF , 1979 .

[35]  M. Berry.  The chloroethylene photochemical lasers: Vibrational energy content of the HCl molecular elimination products , 1974, IEEE Journal of Quantum Electronics.

[36]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[37]  R. F. Barrow,et al.  The Transition V1σ+ - X1σ+ in Hydrogen Chloride , 1959 .