Abstract

A study of the processes of formation of pollutants in the combustion of hydrocarbon fuels is of great current interest, especially in connection with the promising application of new types of lower-quality fuels of both petroleum and nonpetroleum origin. Ideas which are presently just taking shape about emissions of carbon monoxide and unburnt hydrocarbons (CxHy) and the effect on them of fuel quality reduce for the most part to an analysis of the processes Of atomization and vaporization of the fuel and the organization of the fuel-air mixture in the combustion zone. Thus, increase in the concentration of CO and CxHy in the small-gas regimes is associated with insufficient atomization of fuel and impoverishment of the fuel-air mixture, while increase in the content of nitrogen oxides in the maximal regimes is associated with growth of the flame temperature, and these phenomena intensify as one goes to heavier and thicker fuels with lower elementary hydrogen content.

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