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Ash Vaporization and Condensation During Combustion of a Suspended Coal Particle

Senior, C. L. and Flagan, R. C. (1982) Ash Vaporization and Condensation During Combustion of a Suspended Coal Particle. Aerosol Science and Technology, 1 (4). pp. 371-383. ISSN 0278-6826. doi:10.1080/02786828208958602.

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The results of a theoretical study of the formation and growth of the submicron flyash aerosol around a single burning coal particle are presented. The vaporization of ash and subsequent aerosol formation near the coal particle are studied because the local combustion environment influences these processes strongly. A mathematical model is developed that describes the transport of ash vapor and and the growth of the aerosol. The ash aerosol calculation is superimposed on an existing solution to the combustion problem. Included in the model are the effects of convective transport and of both homogeneous and heterogeneous condensation of the ash vapor. The results of the calculations show that refractory compounds with low surface tension, like silica, nucleate very near the coal particle's surface and produce a substantial mass loading of aerosol. The presence of the aerosol does not greatly affect the ash vaporization rate, which is primarily a function of combustion conditions. The size and amount of the submicron ash aerosol are determined by both the local combustion conditions and the ash's physical properties.

Item Type:Article
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URLURL TypeDescription
Senior, C. L.0000-0002-1454-4194
Flagan, R. C.0000-0001-5690-770X
Additional Information:© 1982 American Association for Aerosol Research. Received 14 May 1982; accepted 8 September 1982.
Issue or Number:4
Record Number:CaltechAUTHORS:20150623-112411565
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58447
Deposited By: Irina Meininger
Deposited On:23 Jun 2015 18:37
Last Modified:17 Apr 2023 19:47

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