Continuous stirred tank reactors agitators/impellers

Determine the reactor volume required for one reactor and that for two equal-sized reactors in series for 80 percent conversion of A. And if the capital cost of a continuous-flow stirred-tank reactor unit is given by 200,000(17/100)° 6 (where V is reactor volume in m3), the life is 20 years with no salvage value, and power costs 3 cents per kilowatt-hour, determine which system has the economic advantage. Assume that overhead, personnel, and other operating costs, except agitation, are constant. The operating year is 340 days. Each reactor is baffled (with a baffle width to tank diameter of 1/12) and equipped with an impeller whose diameter is one-third the tank diameter. The impeller is a six-bladed turbine having a width-to-diameter ratio of 1 /5. The impeller is located at one-third the liquid depth from the bottom. The tank liquid-depth-to-diameter ratio is unity. 

The continuous-flow stirred-tank reactor (CFSTR) of 50 ml capacity was constructed of stainless steel and was jacketed for temperature control. The reactor was 5.08 cm high and had 3.8 cm inside diameter. Four equally spaced 0.32 cm baffles were welded to the bottom of the reactor. The agitator was a 2.5 cm diameter standard four-blade turbine impeller operated at 3000 rpm. 

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