effective parameters in the design of a loop reactor for bulk propylene polymerization with z-n catalyst

the steps taken in designing a loop reactor for bulk propylene polymerization are discussed. the roles played by several parameters like particle growth factor, catalyst activity and solid fraction on reactor volume at different operating conditions are investigated. at first, based on a fixed production capacity and specific rate of catalyst, reactor volume is determined. next, the length and diameter of loop reactor are determined according to the critical velocity and heat transfer limitations. an optimum reactor diameter is selected such that the sum of investment and operating costs are reduced and reactor dimensions for construction are practically feasible. by widening the difference between coolant and reactor temperatures, the estimated reactor diameter increases and the length of reactor is decreased. on the other hand, when the slurry flow rate increases, there will be a need for higher pump power and increase in the operating cost.