- Author
-
Schlosser, E.
- Title
- High Temperature In-Situ Measurement of Potassium. BFRL Fire Research Seminar. VHS Video.
- Coporate
- Ruprecht-Karls-Universitat, Heidelberg, Germany
- Report
-
Video,
January 18, 2000,
- Keywords
-
potassium
|
high temperature
|
gas turbine engines
- Abstract
- Since fossil fuels will still be used as important energy sources for the next decades it is important to increase the efficiency and to reduce the CO2 emission. This can be achieved by using high temperature furnaces and gas turbines. The high temperature and pressure however will result in the increased release of alkali and heavy metals that lead to severe problems with corrosion of the gas turbines. This is why the manufacturers of those turbines demand low concentration limits of those elements. Present research is focused on developing new, improved filters for hot gases and analyzing the chemistry of alkali metals in flue gases. Because of the process conditions and the high reactivity of the species, extractive sensors are not suitable. An in-situ measurement is needed to monitor the efficiency of the filters and as a general diagnostic tool. We have developed a compact in-situ spectrometer based on diode lasers. In order to simulate industrial applications, we used an oven to demonstrate the sensitivity of the optical measurement of potassium that results from thermal dissociation of KCl at 1273K. With an absorption path length of 6.1cm we have been able to determine concentrations down to 7.5 x 10(6) atoms/cm3.