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Measurement of Mass Transfer to Agglomerate Aerosols

Rogak, S. N. and Baltensperger, U. and Flagan, R. C. (1991) Measurement of Mass Transfer to Agglomerate Aerosols. Aerosol Science and Technology, 14 (4). pp. 447-458. ISSN 0278-6826. https://resolver.caltech.edu/CaltechAUTHORS:20150805-111317219

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Abstract

The mass transfer to agglomerate titanium dioxide aerosols produced in a thermal reactor was measured and compared to the mass transfer for spheres of the same mobility. The material transferred to the particles was ultrafine radioactive lead clusters produced via the decay chain of ^(227)Ac. The lead attachment rate was measured with an epiphaniometer, a device that mixes a fixed concentration of radioactive lead atoms with the sample for a period of several minutes and then measures the quantity of lead attached to the particles. In the free-molecular regime, where the particle diameter is small compared with the mean free path of the gas and the diffusing species, previous studies have shown by theory and experiment that the mass transfer to an aerosol is inversely proportional to the particle mobility. This study showed that this is also true for particles in the transition regime, where the particle diameter is comparable to the mean free path. Further, the mass transfer rate is shown to be independent of particle shape for particles of the same mobility, at least when the mean free paths of the gas and the diffusing species are comparable.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1080/02786829108959505DOIArticle
http://www.tandfonline.com/doi/abs/10.1080/02786829108959505PublisherArticle
ORCID:
AuthorORCID
Flagan, R. C.0000-0001-5690-770X
Additional Information:© 1991 American Association for Aerosol Research. Received July 16, 1990; accepted November 28, 1990. The authors gratefully acknowledge the financial support of the International Fine Particle Research Institute and the Swiss National Science Foundation. For the scanning electron microscopy we thank A. Portmann at the Institute for Inorganic Chemistry, University of Zurich, Switzerland.
Funders:
Funding AgencyGrant Number
International Fine Particle Research InstituteUNSPECIFIED
Swiss National Science Foundation (SNSF)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20150805-111317219
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150805-111317219
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59222
Collection:CaltechAUTHORS
Deposited By: Irina Meininger
Deposited On:05 Nov 2015 23:50
Last Modified:03 Oct 2019 08:44

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