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| Titel |
Particle size distributions from laboratory-scale biomass fires using fast response instruments |
| VerfasserIn |
S. Hosseini, Q. Li, D. Cocker, D. Weise, A. Miller, M. Shrivastava, J. W. Miller, S. Mahalingam, M. Princevac, H. Jung |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 16 ; Nr. 10, no. 16 (2010-08-30), S.8065-8076 |
| Datensatznummer |
250008737
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| Publikation (Nr.) |
 copernicus.org/acp-10-8065-2010.pdf |
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| Zusammenfassung |
| Particle size distribution from biomass combustion is an important parameter
as it affects air quality, climate modelling and health effects. To date,
particle size distributions reported from prior studies vary not only due
to difference in fuels but also difference in experimental conditions. This
study aims to report characteristics of particle size distributions in well
controlled repeatable lab scale biomass fires for southwestern United States
fuels with focus on chaparral. The combustion laboratory at the United
States Department of Agriculture-Forest Service's Fire Science Laboratory
(USDA-FSL), Missoula, MT provided a repeatable combustion and dilution
environment ideal for measurements. For a variety of fuels tested the major
mode of particle size distribution was in the range of 29 to 52 nm, which is
attributable to dilution of the fresh smoke. Comparing mass size
distribution from FMPS and APS measurement 51–68% of particle mass was
attributable to the particles ranging from 0.5 to 10 μm for PM10.
Geometric mean diameter rapidly increased during flaming and gradually
decreased during mixed and smoldering phase combustion. Most fuels
produced a unimodal distribution during flaming phase and strong biomodal distribution
during smoldering phase. The mode of combustion (flaming, mixed and
smoldering) could be better distinguished using the slopes in MCE (Modified Combustion Efficiency) vs. geometric
mean diameter than only using MCE values. |
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