You are designing a plug-flow reactor for the gas-phase reaction: A C rC = k1 CA k1 = 0.030 sec-1 A B rB = k2 CA2 k2 = 30 ft3 / lb mole. sec C is a pollutant and costs money to dispose of and B is the desired product. What size of reactor will provide an effluent stream with the maximum dollar value? DATA: B has a value of $60/lb mole It costs $15/lb mole to dispose of C A has a value of $10/lb mole Feed is 22.5 ft3 /sec of pure A Concentration of A in feed is 4.47x 10-3 lb mole/ ft3 Reaction conditions are 4600 F, and 3 atm pressure Volumetric flow rate is 15 ft3/sec at reaction conditions