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- W2050984770 abstract "Aerosols from combustion sources are of high concern since they present a risk for health and environment. Particle size distribution of aerosols and in particular number size distribution are easily and quickly obtained using an Electrical Low Pressure Impactor (ELPI). However, this technique is depending of aerosol density; ρ, which may lead to biased particle size distributions. Aerosol density from combustion sources is usually not well known and depends on several parameters. Aerosol density cannot be measured with usual methods since there is generally not enough matter collected on each stage of the ELPI. Our approach uses electronic microscopy to evaluate ρ at each impaction stage in order to increase the accuracy of the number size distributions resulting from the ELPI measurements. Particles were collected on glass substrates deposited on each impaction stages. Images were obtained using a scanning electron microscope and image processing tools were applied. This method was first tested with silica particles resulting from a combustion process which have a constant density found to be comprised between 2.2 and 2.4 g cm−3 for stages 2 (57 and 95 nm) and 3 (95 and 158 nm), respectively. Once validated, this method was used to determine the density of wood combustion aerosols. The results match well for fly ashes from wood combustion with densities varying from 1.1 to 3.0 g cm−3 for particles of mean equivalent diameter ranging from 69 to 157 nm, respectively." @default.
- W2050984770 created "2016-06-24" @default.
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- W2050984770 date "2009-05-01" @default.
- W2050984770 modified "2023-10-18" @default.
- W2050984770 title "Density measurement of fine aerosol fractions from wood combustion sources using ELPI distributions and image processing techniques" @default.
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- W2050984770 doi "https://doi.org/10.1016/j.fuel.2008.12.013" @default.
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