Abstract

Laser-induced fluorescence measurements of NO in CH4–air flames seeded with CH3Cl and CH2Cl2 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 C2H3Cl and CHCl2 species are responsible for the formation of HCl and CCl, respectively, and a photolytic mechanism for formation of the photofragments is proposed.

© 1998 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Sensitive in situ detection of chlorinated hydrocarbons in gas mixtures

Charles S. McEnally, Robert F. Sawyer, Catherine P. Koshland, and Donald Lucas
Appl. Opt. 33(18) 3977-3984 (1994)

Photochemical effects in multiple species fluorescence imaging in hydrogen–nitrous oxide flames

J. E. M. Goldsmith, Marcus Aldén, and Ulf Westblom
Appl. Opt. 29(33) 4852-4859 (1990)

Quantitative two-photon LIF imaging of carbon monoxide in combustion gases

Jerry M. Seitzman, Jurgen Haumann, and Ronald K. Hanson
Appl. Opt. 26(14) 2892-2899 (1987)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription