Acid Gas Production in Inhibited Propane-Air Diffusion Flames.
Acid Gas Production in Inhibited Propane-Air Diffusion
Linteris, G. T.
American Chemical Society. Halon Replacements -
Technology and Science. National Meeting, 208th.
Proceedings. ACS Symposium Series 611. Chapter 20.
August 21-25, 1994, Washington, DC, American Chemical
Society, Washington, DC, Miziolek, A. W.; Tsang, W.,
Editor(s)(s), 225-242 pp, 1995.
chemical inhibition; flame chemistry; flame models;
The proposed replacements to halon 1301, mainly
fluorinated and chlorinated hydrocarbons, are expected
to be required in significantly higher concentrations
than CF3Br to extinguish fires. At these higher
concentrations the by-products of the inhibited flames
may include correspondingly higher portions of corrosive
gases, including HF and HCl. To examine the chemical
and transport-related mechanisms important in producing
these acid gases, a series of inhibited flame tests are
performed with several types of laboratory-scale
burners, varying agent type and concentration. A
wet-chemistry analysis of the final products of the
flames using ion-selective electrodes for F anc Cl
provides an experimental basis for quantitative
understanding of the HF and HCl production. Production
rates are measured for co-flow laminar and jet diffusion
flames. Systematic selection of the agent
concentrations, burner type, and air flow rates allows
an assessment of the relative importance of agent
transport and chemical kinetics on the acid gas
production rates. These experimental results are then
compared to a model which estimates the maximum HF and
HCl production rates based on stoichiometric reaction to
the most stable products. The results demonstrate the
relative significance ofF, Cl, and H in the inhibitor
and fuel, as well as the effect of different burner