Ultrafine Combustion Aerosol Generator.
Ultrafine Combustion Aerosol Generator.
(123 K)
Cleary, T. G.; Mulholland, G. W.; Ives, L. K.; Fletcher,
R. A.; Gentry, J. W.
Aerosol Science and Technology, Vol. 16, 166-170, 1992.
Keywords:
aerosol generators; combustion aerosols; particle size;
size distribution; mass spectroscopy
Abstract:
We are able to produce a narrowly distributed combustion
aerosol with a mean particle size of about 10 nm by
operating a laminar diffusion burner with acetylene fuel
in the nominal "presooting" condition. Number
concentrations of approximately 106 particles/cm3 are
obtained. The mean particle size obtained by
transmission electron microscopy (TEM) and by diffusion
battery (DB) is 7 nm and 10 nm, respectively. Both
measurements indicate a narrow size distribution with a
geometric standard deviation of less than 1.4. Laser
microprobe mass spectroscopy (LAMMS) indicates that the
particles are composed of phosphorous and sulfur
compounds, arising from acetylene fuel impurities, in
addition to carbonaceous material.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899