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Modeling and Experimental Analysis of PSD Measurements through FBRM
Author(s) -
Ruf Alfred,
Worlitschek Jörg,
Mazzotti Marco
Publication year - 2000
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/1521-4117(200012)17:4<167::aid-ppsc167>3.0.co;2-t
Subject(s) - particle size distribution , particle size , optics , crystallization , dispersion (optics) , population , suspension (topology) , particle (ecology) , materials science , line (geometry) , biological system , chord (peer to peer) , computational physics , physics , chemistry , mathematics , thermodynamics , biology , geometry , ecology , distributed computing , demography , homotopy , sociology , computer science , pure mathematics
The Focused Beam Reflectance Measurement (FBRM) technique provides on‐line and in‐situ information about the chord length distribution of a population of particles in dispersion. This is rather promising for applications such as crystal size distribution control in crystallization processes. The objective of this study is to deepen the understanding of the characteristics of the FBRM measurement. On the one hand, a model is presented, which allows in principle to transform particle size distributions (PSD) into chord length distributions (CLD). On the other hand, measurements with particles in suspension show the critical dependence of the measurement on the optical properties of the system. A special technique has been developed to measure CLDs of single particles. These measurements clarify some of the above effects, detect possible over‐ and underestimations of particle size and give indications about how to interpret and exploit on‐line CLD spectra.