Developing breakage models relating morphological data to the milling

  • A hot wall titania reactor is simulated using a detailed population balance model.
  • Breakage models are developed utilising morphological data from the particle model.
  • Models are used to relate reactor conditions to the milling behaviour of particles.

abstractA detailed population balance model is used to relate the reactor conditions of flame synthesised titanium dioxide particles to their milling behaviour. Breakage models are developed that utilise morphological data captured by a detailed particle model to relate the structure of aggregate particles to their sizereduction behaviour in the post-synthesis milling process. Simulations of a laboratory-scale hot wall reactor are consistent with experimental data and milling curves predicted by the breakage models exhibit features consistent with experimental observations. The selected breakage model considers the overall fractal structure of the aggregate particles as well as the neck size between neighbouring primary particles. Application of the model to particles produced under different reactor residence times and temperatures demonstrates that the model can be used to relate reactor conditions to the milling performance of titanium dioxide particles.

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Keywords: titania, population balance, breakage, milling

Associated Projects: Nanoparticles and Particle Processes

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