Synthetically generated calibration spectra for combustion analysis by FTIR

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Courtesy of CIC Photonics, Inc.

Challenges for FTIR Analysis in Combustion Applications (1/2)

  • Combustion applications generate high amount of water vapor and CO2
  • Their absorption spectra strongly overlap with other species of real interest for the combustion analyses
  • The difference of concentration level of water vapor and CO2 with respect other combustion products can range from 1 to 5 orders of magnitude

Challenges for FTIR Analysis in Combustion Applications (2/2)

  • The high intensity spectral features of water vapor and CO2 at high concentration work like narrow band pass filters to block all the available light in the spectral regions they occupy
  • The less intense features of water and CO2 that overlap with other combustion species will normally show a non-linear behavior in their absorption spectrum

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