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Production of Polycyclic Aromatic Hydrocarbons From Underventilated Hydrocarbon Diffusion Flames.


pdf icon Production of Polycyclic Aromatic Hydrocarbons From Underventilated Hydrocarbon Diffusion Flames. (326 K)
Tolocka, M. P.; Miller, J. H.

Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Proceedings. Fall Technical Meeting, 1995. October 16-18, 1995, Worcester, MA, 253-256 pp, 1995.

Sponsor:

National Institute of Standards and Technology, Gaithersburg, MD

Keywords:

combustion; diffusion flames; polycyclic aromatic hydrocarbons; soot; underventilated combustion

Abstract:

Polycyclic Aromatic Hydrocarbons (PAH) are ubiquitous products of incomplete combustion, and have been found adsorbed on the particulate emissions from wood fires, pulverized coal combustion, waste incineration, and laboratory scale flames. Because specific PAH are known to be mutagenic, measuring the concentration levels of these compounds is important in assessing risk from these combustion sources. It has been recently noted that soot generated from underventilated diffusion flames is remarkably different in structure than soot from overventilated combustion, and the smoke generated from underventilated combustion has a much higher organic composition. It is expected that the organic component of the soot is largely PAH, molecules which are thought to be the precursors to soot formation. We present here initial quantiative measurements of PAH absorbed on the surface of particles generated from overventilated and underventilated flames.