The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Detection of HCl in a Premixed CH4/O-2/Ar Flame Seeded with CHCl3 Using Mid-IR Polarization Spectroscopy

På svenska

Author

Summary, in English

Mid-infrared polarization spectroscopy (IRPS) was applied to detect HCl in flames. For the first time, sensitive and nonin trusive HCl detection with a manner of high spatial- and temporal-resolution in harsh reactive gas flow has been demonstrated in this work. In an atmospheric pressure premixed CH4/O-2/Ar flat flame, trace level HCl was prepared by seeding small amount chloroform through the Ar flow. IRPS HCl detection in the burnt region of the equivalent flame was pert formed by probing the fundamental ro-vibration transitions with a 3.2 mu m tunable pulsed laser produced through difference frequency mixing of a 1064 nm and a tunable 800 nm laser beams from a injection seeded Nd:YAG and a dye laser pumped by the second harmonic of the same Nd:YAG laser, respectively. High resolution IRPS excitation scans were recorded in the flames both with and without chloroform seeding. All the HCl rotation lines in the chosen spectral range were recognized among the dense lines from hot water, which was the majority species in the burnt region of the flat flame. The saturation behavior of the HCl IRPS was investigated by study the variation of the signal intensity with pumping laser pulse energy and the saturation pulse energy was found to be 250 mu J. in the setup. The dependence of the IRPS signal on the HCl number density was also investigated and a detection limit of less than 100 ppm in the atmospheric pressure flame was estimated based on the measurements. The potential interference from water lines related to the IRPS application was also investigated.

Department/s

Publishing year

2008

Language

English

Pages

222-226

Publication/Series

Proceedings of the Ninth Asia-Pacific International Symposium on Combustion and Energy Utilization

Document type

Conference paper

Publisher

World Publishing Corporation

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • mid-infrared Polarization Spectroscopy
  • diagnostics
  • laser combustion
  • HCl detection

Conference name

9th Asia-Pacific International Symposium on Combustion and Energy Utilization

Conference date

2008-11-02 - 2008-11-06

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-7-5062-9284-9