کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5428715 1508689 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of aggregates' size distribution by angular light scattering
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
Measurement of aggregates' size distribution by angular light scattering
چکیده انگلیسی

A novel method is introduced for in situ determination of the size distribution of submicronic fractal aggregate particles by unique measurement of angular scattering of light. This method relies on the dependence of a new defined function Rg⋆ on the polydispersity of the aggregates' size distribution. The function Rg⋆ is then interpreted by the use of iso-level charts to determine the parameters of the log-normal soot size distribution. The main advantage of this method is its independence of the particle optical properties and primary sphere diameter. Moreover, except for the knowledge of fractal dimension, this method does not require any additional measurement. It is validated on monodisperse particles selected by a differential mobility analyzer and polydisperse soot from ethylene diffusion flame whose size distribution is independently determined by Transmission Electron Microscopy. Finally, the size distribution of soot generated by a commercial apparatus is measured by the proposed method and the comparison to that given by a commercial granulometer shows a good agreement.

► A novel method is introduced for in situ measurement of aggregates size distribution. ► Only measurements of scattered light at three angles are required. ► Neither the refractive index nor the primary sphere diameter is necessary. ► The method is validated experimentally on monodisperse and polydisperse particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 126, September 2013, Pages 140-149
نویسندگان
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