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EGA – Optical In-Situ Evolved Gas Analysis

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Possible Techniques:

  • FTIR: Fourier Transform Infrared Spectroscopy
  • Measurement of basic and trace gas components until ppm range, 
  • (for example H2O, CO2, CO, H2S……)
  • Polar Molecules are necessary
  • Raman-Spectroscopy:
  • Measurement of basic gas components
  • Also non polar molecules like H2 or N2 measurable
  • ELIF: Excimer Laser induced Fragmentation Fluorescence
  • UV-Laser-based Method of Measuring of gaseous alkaline compounds (for example NaCI, NaOH, KCI, KOH)
  • Also at 193 nm a entry through UV_saphire is possible

Advantages of the optical In-Situ window:

  • No Cooling / Modification of the measuring gas (for example no out-condensation, no transition reaction, no equilibrium shift) many materials with high condensation temperature for example alkali metals (Na, K and their combinations) are now able to be measured, heated capillary only suitable for some 200 – 250°C, the optical port allows measurement until 1600°C
  • No intervention into the measuring system (for example when pulling gas by vacuum)
  • No contamination of the measuring gas in the capillary to M/S or FTIR
  • Real-time online-Measurement (no dead time until measuring volume enters the measuring instrument

Ota yhteyttä

Chris Bradburn

Chris

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