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Aerosol Growth in a Steady-State, Continuous Flow Chamber: Application to Studies of Secondary Aerosol Formation

Seinfeld, John H. and Kleindienst, Tadeusz E. and Edney, Edward O. and Cohen, Jason B. (2003) Aerosol Growth in a Steady-State, Continuous Flow Chamber: Application to Studies of Secondary Aerosol Formation. Aerosol Science and Technology, 37 (9). pp. 728-734. ISSN 0278-6826. doi:10.1080/02786820300915.

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An analytical solution for the steady-state aerosol size distribution achieved in a steady-state, continuous flow chamber is derived, where particle growth is occurring by gas-to-particle conversion and particle loss is occurring by deposition to the walls of the chamber. The solution is presented in the case of two condensing species. By fitting the predicted steady-state aerosol size distribution to that measured, one may infer information about the nature of the condensing species from the calculated values of the species's molecular weights. The analytical solution is applied to three sets of experiments on secondary organic aerosol formation carried out in the U.S. Environmental Protection Agency irradiated continuous flow reactor, with parent hydrocarbons: toluene, f -pinene, and a mixture of toluene and f -pinene. Fits to the observed size distributions are illustrated by assuming two condensing products for each parent hydrocarbon; this is a highly simplified picture of secondary organic aerosol formation, which is known to involve considerably more than two condensing products. While not based on a molecular-level model of the gas-to-particle conversion process, the model does allow one to evaluate the extent to which the observed size distribution agrees with that based on a simple, two-component picture of condensation, and to study the sensitivity of those size distributions to variation of the essential properties of the condensing compounds, such as molecular weight. An inherent limitation of the steady-state experiment is that it is not possible to calculate the vapor pressures of the condensing species.

Item Type:Article
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URLURL TypeDescription
Seinfeld, John H.0000-0003-1344-4068
Kleindienst, Tadeusz E.0000-0002-3024-1564
Additional Information:This research was supported by the Biological and Environmental Research Program (BER), U.S. Department of Energy, Grant No. DE-FG03-01ER63099.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-01ER63099
Issue or Number:9
Record Number:CaltechAUTHORS:20230221-987794800.6
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:119330
Deposited By: Tony Diaz
Deposited On:21 Feb 2023 22:07
Last Modified:21 Feb 2023 22:07

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