Particle Formulation in Spray Fluidized Beds

Mirko Peglow, Seigiy Antonyuk, Michael Jacob, Stefan Palzer, Stefan Heinrich, and Evangeios Tsotsas 

Chapter 6 has shown that particles with desired properties can be produced by spray drying. In spray drying, the formation of the particles is a result of evaporation of the solvent from a solution or suspension. Product quality depends on the properties of the materials used, the operating conditions, and - to a certain extent - also on the equipment design. 

Recent progress in experimental methods for observation and characterization of the particle system were presented in Chapter 5 of Volume 2 of this series. As for design methods, it has been pointed out, in Chapter 6 of Volume 1 of this series, that population balance equations can be used. However, such equations contain kinetic terms for birth, growth and death of particles, which must be reliably known for practical application. Moreover, they are continuous, macro-scale representations that - by definition - cannot directly account for micro-scale physics. 

Modem Drying Technology Volume 3 Product Quality and Formulation, First Edition. 

General Principles of Particle Formulation in Spray Fluidized Beds 

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General Principles of Particle Formulation in Spray Fluidized Beds 297 wetting drying aggiomerate... 

The previous discussion pointed out that various material properties have a more or less strong influence on particle formulation in spray fluidized beds. Process conditions, such as the spraying rate, gas temperature, or the mass flow rate of the fluidization gas, can also very significantly affect the properties of the resulting particles. This aspect will be illustrated in the present section by means of selected examples. 

Chapter 5 Understanding and preventing structural changes during drying of gels Chapter 6 Morphology and properties of spray-dried particles Chapter 7 Particle formulation in spray fluidized beds... 

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