Effects of Aromatic Species on Soot Particle Size Distribution and Species Concentration in a Well Stirred Reactor/Plug Flow Reactor.
Effects of Aromatic Species on Soot Particle Size
Distribution and Species Concentration in a Well Stirred
Reactor/Plug Flow Reactor.
Manzello, S. L.; Lenhert, D. B.; Stroud, C. B.; Tsang,
Combustion Institute/Western States. Fifth (5th) Joint
Meeting of the U.S. Sections. Meeting Theme:
Fundamentals of Combustion, Air Pollution and Global
Warming, Alternative Fuels. Hosted by The University of
California. March 25-28, 2007, San Diego, CA, 1-9 pp,
combustion; soot; particle size distribution; aromatics;
additives; polycyclic aromatic hydrocarbons; fuel/air
ration; benzene; soot inception; ethylene; air;
residence time; soot formation; injection; probes;
experiments; gas chromatography; mass spectrometers
A well-stirred-reactor (WSR) followed by a plug flow
reactor (PFR) is being used to study PAR growth and soot
inception. For a given fuel-air system, there is a
unique fuel-to-air equivalence ratio corresponding to
soot inception. This point has been determined for
ethylene-air combustion in the WSR/PFR and detailed
characterization of the soot particle size distribution
and species concentration in the vicinity of this point
with and without the addition of specific species
(aromatics) thought to be important for soot formation
processes were investigated. Two different dilution
probes designed for the WSR and PFR sections were
coupled to a nano-differential mobility analyzer
(nano-DMA) to understand the influence of aromatic
species on soot particle size distributions.
Concurrently, a gas chromatograph coupled to a mass
spectrometer (GCIMS) was used to analyze samples
extracted nom the WSR/PFR at a known residence time for
a given equivalence ratio and additive concentration.
These highly resolved measurements are being used to
develop and validate a quantitative kinetic database for
P AH growth and a soot inception model. Results obtained
for benzene are discussed.