Measurement of the optical extinction coefficient of combustion-generated aerosol

This note describes measurements of the mass-specific extinction coefficient, σ s , of carbonaceous aerosol produced during hydrocarbon combustion. Measurements of σ s were obtained by laser extinction at λ = 632 nm . The aerosol was generated using a laminar diffusion flame, and the mass-specific e...

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Bibliographic Details
Published inJournal of aerosol science Vol. 36; no. 2; pp. 283 - 289
Main Authors Widmann, John F., Duchez, Jason, Yang, Jiann C., Conny, Joseph M., Mulholland, George W.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.02.2005
Elsevier Science
Subjects
Aerosols
Carbonaceous aerosol
Chemistry
Colloidal state and disperse state
Elemental carbon
Exact sciences and technology
Extinction coefficient
General and physical chemistry
Smoke
Soot
Total carbon
Extinction coefficient
Elemental carbon
Total carbon
Smoke
Soot
Carbonaceous aerosol
Optical measurement
Extinction
Aerosols
Combustion
Carbon
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Summary:This note describes measurements of the mass-specific extinction coefficient, σ s , of carbonaceous aerosol produced during hydrocarbon combustion. Measurements of σ s were obtained by laser extinction at λ = 632 nm . The aerosol was generated using a laminar diffusion flame, and the mass-specific extinction coefficient determined as a function of the global equivalence ratio, φ . The elemental carbon content of the aerosol was also determined with respect to φ . A relationship was developed between the elemental carbon/total carbon (EC/TC) ratio and σ s . A simple method of producing laboratory aerosol with controlled EC/TC ratio is also presented.
ISSN:0021-8502
1879-1964
DOI:10.1016/j.jaerosci.2004.09.005