- Author
-
Buckley, S. G.
- Title
- Laser Methods for Real-Time, In Situ Measurement of Metals in Combustion Systems. BFRL Fire Research Seminar. VHS Video.
- Coporate
- Maryland Univ., College Park
- Report
-
Video
June 10, 1999
- Keywords
-
lasers
|
metals
|
combustion
- Abstract
- There is a continuing interest in real-time methods for measurement of metals in high temperature systems. Pending regulations and concerns over the health effects of the toxic metals drive some interest, as do process control requirements. Increased use of metals in fire suppression, and the desire to understand complex flows and chemistry occurring during the suppression event may be another driver for improved diagnostic techniques for metals. These measurements are often complicated by the need to measure metals in both the gas-phase and in the condensed phase as aerosols. This talk will highlight excimer laser fragmentation-fluorescence spectroscopy (ELFFS) and laser-induced breakdown spectroscopy (LIBS) as methods for making in situ, real-time measurements of metal species in combustion systems. Laboratory in-flame measurements and field stack measurements will illustrate the capabilities of each technique and suggest further applications. ELFFS measurements in flames will highlight the applicability of ELFFS to a variety of species and the response to a changing particle size. Laboratory and field measurements made using LIBS will illustrate the robust nature of the technique for a large number of species in vapor and/or aerosol phase. Current work to apply both of these techniques in real-world systems will be discussed.