Postflame injection of fuel has been proposed as a means of reducing chlorinated hydrocarbons (CHCs) in a combustion exhaust. In this study, the effects of this strategy on CHCs and NO(χ) are investigated. A small amount of fuel, such as CO or CH3OH, has been injected into the postflame region from a turbulent combustion-driven flow reactor to assess its effect on the destruction of two CHCs (CH3Cl and C2H5Cl) and simultaneously, the oxidation of NO to NO2. The results suggest that this strategy is effective only in certain conditions. There is an optimal temperature ~ 1050 K, where NO is most effectively converted to NO2. Adding fuel to the postflame region increases the concentrations of both HO2and OH radicals, but temperature is the key factor in determining which radical will dominate the reaction pathway. For the destruction of CHCs, attack by OH is the major destruction route, with T > 1200 K desired. For NO oxidation, the HO2radical is the key species, and lower temperatures are necessary.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Physics and Astronomy(all)