![]() ![]() Pyrene predominates in the mixture but the carcinogen 3,4-benzopyrene is present in smaller amounts. The PCAH adsorbed on the soot particles leaving the flame have been analysed by programmed temperature gas chromatography. With ethane, the amounts of dry soot and CR increase to maxima and then decline whereas the chloroform-soluble material and PCAH decrease steadily with increase in oxygen/ethane molar ratio in the fuel stream. With ethylene, the amounts of dry soot, chloroform-soluble material, PCAH and carbonaceous residue (CR) all increase to maxima and then decrease. ![]() The amounts of chloroform-soluble material, polycyclic aromatic hydrocarbons (PCAH) and carbonaceous residue in the dry soot recovered from ethylene-air and ethane-air diffusion flames respectively have been determined and the effects on these of increasing additions of oxygen to the fuel have been investigated. ![]()
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