ABSTRACT
This scientific research presents a study of Fluidization and De-Fluidization of different packing materials which are classified according to the Geldart’s Classification in a fluidized bed reactor in order to estimate the minimum Fluidization and De-Fluidization velocities and pressure drop of different materials like sand, wheat, flour and milk powder. For this purpose experiment is carried out in a fluidized bed reactor and on the different flow rates from minimum to maximum flow rates the height of bed and pressure drop is noted for Fluidization process and from maximum to minimum flow rates height of bed and pressure drop is noted for De-Fluidization for each packing materials. To analyze our experimental data graphical method is used and the results show that the minimum Fluidization and De-Fluidization for Milk Powder is 25.2 and 25, for Sand 25.1 and 25, for Flour 20.3 and 20, and for Wheat 29 and 29.1 liter per minute respectively. The results also show that the minimum fluidization velocity and de-fluidization velocities are increases as the particle diameter and density increases. The trend of increase in velocities is given by Wheat > Milk Powder > Sand > Flour. The pressure drop also increases as the flow rate increases but after a certain limit of flow rate it becomes constant for all four groups of particles.
