Rainer Jossen1, Martin C. Heine1, Gregory Beaucage2, Theyencheri Narayanan3, and Sotiris E. Pratsinis1. (1) Particle Technology Laboratory, Swiss Federal Institution of Technology Zurich, Sonneggstrasse 5 NO H 19, Zurich, 8092, Switzerland, (2) Chemical and Materials Engineering, University of Cincinnati, 400 Rhodes Hall, Mail location 12, Cincinnati, OH 45221, (3) ID02, European Synchrotron Research Facility, Grenoble, F-38043, France
Droplet and particle dynamics are studied in situ and non-intrusively in a particle-laden spray flame producing 15 g/h zirconia using 2D-Phase Doppler Anemometey (PDA), Fourier transform infrared (FTIR) emission/transmission spectroscopy and small angle x-ray scattering (SAXS). Droplet velocities are measured by PDA and droplets smaller than 4 ƒÝm are used to estimate the flame gas velocity. Gas temperature is measured in the particle-laden spray flame by FTIR emission/transmission spectroscopy. SAXS is used to measure simultaneously the evolution of primary-particle diameter, mass-fractal dimension, geometric standard deviation, particle volume fraction, particle number concentration, agglomerate size and number of primary particles per agglomerate of zirconia in the spray flame. For SAXS, a third-generation synchrotron source is used where nano- to microscales measurement were possible. PDA, FTIR and SAXS measurements are coupled to study particle growth as function of time in a defined temperature and velocity profile.
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