Abstract
AN investigation has been made of the polycyclic aromatic hydrocarbons associated with the soot in pre-mixed acetylene–oxygen flames operating at a pressure of 20 mm of mercury. The burner, diameter 5.125 in., incorporated a water-cooled porous metal disk and enabled a flat-flame to be stabilized above it with an extended reaction zone. Water-cooled stainless steel grids were inserted into the flame at varying heights above the burner and samples of soot were collected.
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