- Author
-
Linteris, G. T.
- Title
- Mechanism of Flame Inhibition by Iron Compounds. BFRL Fire Research Seminar. VHS Video.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
Video,
June 15, 1999,
- Keywords
-
flame inhibition
- Abstract
- Iron pentacarbonyl (Fe(CO)5) exhibits extraordinary flame inhibition effects -- up to 100 times greater than CF3Br, under some circumstances, but little effect under others. This talk presents the results of experiments and numerical calculations for Fe(CO)5 flame inhibition in premixed and diffusion flames, and describes why the inhibition occurs under some conditions but not others. Previous results have indicated that the loss of effectiveness may be due to condensation of iron species to particulates. We have now made laser-light scattering and thermophoretic sampling measurements of particles in premixed and counterflow diffusion flames with added Fe(CO)5, and we provide evidence that the inhibition occurs in the gas phase. In addition, we present the first data on the flame inhibition by another, much less toxic iron compound ferrocene, and show how use of ferrocene with CO2 can overcome the loss of effectiveness that iron compounds alone experience at high mole fraction.