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| Hauptseite > Publikationsdatenbank > Assessing Optical Properties and Refractive Index of Combustion Aerosol Particles Through Combined Experimental and Modeling Studies > print |
| Hauptseite > Publikationsdatenbank > Assessing Optical Properties and Refractive Index of Combustion Aerosol Particles Through Combined Experimental and Modeling Studies > print |
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| 024 | 7 | _ | |2 doi |a 10.1080/02786826.2015.1020996 |
| 024 | 7 | _ | |2 ISSN |a 0278-6826 |
| 024 | 7 | _ | |2 ISSN |a 1521-7388 |
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| 100 | 1 | _ | |0 P:(DE-HGF)0 |a Kim, J. |b 0 |
| 245 | _ | _ | |a Assessing Optical Properties and Refractive Index of Combustion Aerosol Particles Through Combined Experimental and Modeling Studies |
| 260 | _ | _ | |a Philadelphia, Pa |b Taylor & Francis |c 2015 |
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| 520 | _ | _ | |a The variability of optical properties of combustion particles generated from a propane diffusion flame under varying fuel-to-air (C/O) ratios was studied with a three-wavelength nephelometer, a particle soot absorption photometer, and an integrating sphere photometer. Information on particle size distribution, morphology, and elemental carbon to total carbon (EC/TC) ratios were obtained from scanning mobility particle sizer measurements, transmission electron microscopy analyses, and thermal-optical analyses. Particles generated under a low C/O ratio (0.22) showed high elemental carbon fraction (EC/TC = 0.77) and low brown carbon to equivalent black carbon (BrC/EBC) ratio (0.01), and were aggregates composed of small primary particles. Rayleigh–Debye–Gans theory reproduced experimental single-scattering albedo, ω, absorption, and scattering Ångström exponents within 56, 3, and 18%, respectively. In contrast, particles produced under a high C/O ratio (0.60) showed low elemental carbon fraction (EC/TC = 0.09) and high BrC/EBC ratio >100, and were smaller and spherical in shape. Their optical properties were better modeled with Mie theory. By minimizing the difference between calculated and measured ω and Ångström exponents, refractive indices of OC at three visible wavelengths were deduced. Contrary to the widely accepted assumption that refractive index of BC is wavelength independent, BC-rich particles exhibited absorption Ångström exponent >1.0 which implies some degree of wavelength dependence. |
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| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Bauer, H. |b 1 |
| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Dobovičnik, T. |b 2 |
| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Hitzenberger, R. |b 3 |
| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Lottin, D. |b 4 |
| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Ferry, D. |b 5 |
| 700 | 1 | _ | |0 P:(DE-Juel1)136669 |a Petzold, A. |b 6 |e Corresponding author |u fzj |
| 773 | _ | _ | |0 PERI:(DE-600)2023330-9 |a 10.1080/02786826.2015.1020996 |g Vol. 49, no. 5, p. 340 - 350 |n 5 |p 340 - 350 |t Aerosol science and technology |v 49 |x 1521-7388 |y 2015 |
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