caa a22 4500 445372672 CHVBK 20180317142952.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00340-010-4315-0 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4315-0 Investigation of unburned carbon particles infly ash by means oflaser light scattering [Elektronische Daten] [R. Iannone, R. Morlacchi, R. Calabria, P. Massoli] A new optical method to determine the percentage of unburned carbon particles in fly ash from combustion of pulverized coal has been developed. The technique exploits the different properties of particles of ash and coal in the elastic scattering of polarized light. The polarization measurements were performed using a linearly polarized laser source and a receiving system able to simultaneously detect the scattered radiation polarized in parallel and orthogonal planes, under the scattering angle of 60°. The parallel and perpendicular components of the scattered light intensities are measured in order to determine the polarization ratio. The operation of the system was tested under various conditions using monodisperse glass spheres. The performance of the novel device was assessed in several sets of measurements with samples of fly ash produced from coal fired power plants. A correlation between the relative content of coal and ashes and the polarization ratio of scattered light was demonstrated. The resulting polarization ratio showed values ranging from 1.25 to 0.94 for a carbon content of 1.17wt% and 16.3wt%, respectively. The uncertainty on the measured percentage of unburned carbon was about1%. The proposed device represents an attractive tool for monitoring real-time burnout and combustion efficiency. Springer-Verlag, 2010 Iannone R. Loccioni, Environment R&D Lab., General Impianti srl, via Monteschiavo 3, 60030, Moie di Maiolati (AN), Italy aut Morlacchi R. Loccioni, Environment R&D Lab., General Impianti srl, via Monteschiavo 3, 60030, Moie di Maiolati (AN), Italy aut Calabria R. Istituto Motori, CNR, Via Marconi 8, 80125, Napoli, Italy aut Massoli P. Istituto Motori, CNR, Via Marconi 8, 80125, Napoli, Italy aut Applied Physics B Springer-Verlag 102/2(2011-02-01), 357-365 0946-2171 102:2<357 2011 102 340 https://doi.org/10.1007/s00340-010-4315-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4315-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iannone R. Loccioni, Environment R&D Lab., General Impianti srl, via Monteschiavo 3, 60030, Moie di Maiolati (AN), Italy aut NATIONALLICENCE 700 1- Morlacchi R. Loccioni, Environment R&D Lab., General Impianti srl, via Monteschiavo 3, 60030, Moie di Maiolati (AN), Italy aut NATIONALLICENCE 700 1- Calabria R. Istituto Motori, CNR, Via Marconi 8, 80125, Napoli, Italy aut NATIONALLICENCE 700 1- Massoli P. Istituto Motori, CNR, Via Marconi 8, 80125, Napoli, Italy aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/2(2011-02-01), 357-365 0946-2171 102:2<357 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer