In this PhD thesis the flow stability in a laboratory three-dimensional prismatic spouted bed
is investigated both experimentally and in CFD-DEM simulations. Liquid is injected in
bottom-spray configuration with the aim of a homogeneous distribution of the coating suspension
on the whole particle bed. The range of stable spouting is increased by the installation of two
parallel draft plates. Nevertheless the instable spouting regime is found to be advantageous
for obtaining a homogeneous coating as the draft plates prevent the mixing in the depth of the
apparatus. In addition to the investigations on laboratory scale the residence time behavior
in a continuous pilot scale spouted bed is characterized using a novel tracer method with
magnetizable particles. The back-mixing in the apparatus is reduced by the insertion of
separation plates with defined transfer geometries.
