Particle Attrition in a Fluidised Bed
In this work a pilot scale fluidised bed is used to assess the particle attrition induced by a jet and the bubbling part bed of âGeldart group Bâ manganese dioxide particles, intended for use in the Chemical Looping Combustion. The effects of the jet gas velocity and orifice size on the rate of attrition are analysed. The study includes both ambient condition and operation at 700 Â°C.
The jet penetration height, for both cold and hot tests, is measured by monitoring the gas pressure using a pitot tube and compared with that obtained from an Eulerian-Eulerian CFD simulation. This is then used in the modelling of the effect of the jet velocity on the overall attrition rate. The model predictions of the rate of elutriated fines are compared with those of the existing models in literature.