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Homogeneous nucleation in supersaturated vapor containing foreign seed aerosol

Warren, Dale R. and Okuyama, Kikuo and Kousaka, Yasuo and Seinfeld, John H. and Flagan, Richard C. (1987) Homogeneous nucleation in supersaturated vapor containing foreign seed aerosol. Journal of Colloid and Interface Science, 116 (2). pp. 563-581. ISSN 0021-9797. doi:10.1016/0021-9797(87)90152-4.

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The formation of aerosol particles by homogeneous nucleation in a supersaturated vapor containing seed aerosol has been studied experimentally and theoretically. In the laboratory, a room-temperature gas optionally containing zinc chloride particles is continuously mixed with a high-temperature gas saturated with dibutyl phthalate (DBP) vapor in a previously discussed device for the study of aerosol nucleation known as a particle size magnifier (PSM). A highly supersaturated vapor is rapidly formed in the mixing zone of the PSM, and gas-to-particle conversion ensues. The vapor may be converted to the aerosol phase by condensation onto the preexisting particles or by homogeneous nucleation to form new particles which then serve as condensation sites themselves. The split between these alternate pathways for gas-to-particle conversion may be deduced from measurements of the resulting aerosol concentrations for different initial supersaturations, seed aerosol concentrations, and seed aerosol sizes. The measured final aerosol concentrations are compared with those predicted by a dynamic model that combines expressions for classical nucleation theory and for steady-state particle growth, and agreement is found to within experimental uncertainties. Suppression of homogeneous nucleation by seed aerosol is not predicted to be strong unless seed aerosol number concentrations are larger than the number concentrations which would result from homogeneous nucleation alone.

Item Type:Article
Related URLs:
URLURL TypeDescription
Okuyama, Kikuo0000-0002-1477-1442
Seinfeld, John H.0000-0003-1344-4068
Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 1987 Elsevier. Received April 3, 1986; accepted July 24, 1986. This work was supported by National Science Foundation Grant ATM-8503103 and Japan Grant-in-Aid for Environmental Science 60030039.
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)60030039
Issue or Number:2
Record Number:CaltechAUTHORS:20150630-170240427
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Official Citation:Dale R Warren, Kikuo Okuyama, Yasuo Kousaka, John H Seinfeld, Richard C Flagan, Homogeneous nucleation in supersaturated vapor containing foreign seed aerosol, Journal of Colloid and Interface Science, Volume 116, Issue 2, April 1987, Pages 563-581, ISSN 0021-9797,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58722
Deposited By: Irina Meininger
Deposited On:22 Jul 2015 21:07
Last Modified:02 Mar 2023 22:07

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