Sooting acetylene/oxygen flames

Figure 1. Number concentrations of species in sooting acetylene/ oxygen flames as a function of height above the burner for different fuel equivalence ratios () and cM gas velocities (v). Pressure = 20 mm Hg points = experimental data curves = estimated trends, (a) Total soot particles (b) charged soot particles = 3.0, v= 50 cmisec, Wersborg (7) (c) targe positive ions = 3,0, v = 38 cm sec, Yeung (9) (d) and (e) total positive ions, different assumed species sizes (see text), = 3,5, v = 50 cmisec. Frier (S),...

Figure 3. Effect of mixture composition on positive ion concentrations in a non-sooting flame (26). Acetylene/oxygen pressure = 4 mm Hg.

Figure 2, Volume concentration of heavy hydrocarbon molecules and soot at different heights above the burner in an acetylene/oxygen flame. Pressure = 20 mm Hg fuel equivalence ratio = 3.0 cold gas velocity = 50 cm sec.

Chrysene occurs as a product of combustion of fossil fuels and has been detected in automobile exhaust. Chrysene has also been detected in air samples collected from a variety of regions nationally and internationally. The concentrations were dependent on proximity to nearby sources of pollution such as traffic highways and industries, and was also dependent on seasons (generally higher concentrations were noted in winter months). Chrysene has also been detected in cigarette smoke and in other kinds of soot and smoke samples (carbon black soot, wood smoke, and soot from premixed acetylene oxygen flames). It has been detected as a component in petroleum products including clarified oil, solvents, waxes, tar oil, petrolatum, creosote, coal tar, cracked petroleum residue, extracts of bituminous coal, extracts from shale, petroleum asphalts, and coal tar pitch. 

Ion Concentrations in Premixed Acetylene-Oxygen Flames near the Soot Threshold... 

Acetylene-oxygen flame near soot threshold... 

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