INTEGRAL CARBON MASS BALANCE IN PREMIXED SOOTING FLAMES.

Article abstract of DOI:10.1002/bbpc.19870910108

In sooting C//2H//4-air, C//6H//6-air and C//2H//2-air flames the burned gases have been analyzed for different fuel-air ratios and the fractions of carbon which end up as CO and CO//2, as soot and as hydrocarbons have been determined. The amount of soot formed increases strongly with increasing fuel content beyond the threshold of soot formation, following approximately the same formal relation for the different fuels. At a given fuel concentration above the soot threshold the soot mass per cm**3 rises from C//2H//2 to C//2H//4 and to C//6H//6-air flames. The concentrations of hydrocarbons in the burned gases increase also with increasing fuel concentrations but in different ways for the different fuels. For benzene-air flames the carbon present as soot exceeds that present as hydrocarbon already at fuel concentrations slightly above the soot threshold.