need in 6 hours
A fluidised bed reactor (diameter 1.5m) has 6000 kg of solid catalyst (bed density is 1000kg/m3, with 50% of the bed occupied by the gas) and is fluidised with gas A (5 bar, 300C). The superficial velocity, the velocity based an empty reactor, u of A is 20 cm/s [login to view URL] see attachment