A cylindrical fluidized bed reactor is designed to process 15,000kg of solid particles with average diameter of 0.35mm. If the reactor is operated at 350C and 8atm, determine the following: (a) The minimal height of fluidized bed, if the density of the particles is 2500kg/m3,mf is 0.5 and the diameter of reactor is 1.5m. [10 marks] (b) Pressure drop experienced by air when passing through the sand bed. Given that R= 0.082atmm3/kmol.K, [10 marks] (c) Minimal fluidization velocity, if the viscosity of the air is 0.016mPas. [6 marks] (d) The nature of the air flow (i.e. laminar flow or turbulent flow). [4 marks]