1. The exothermic elementary liquid-phase reaction: A+B_* > Follows the rate equation r=kCACs and is carried out in a ba

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1 The Exothermic Elementary Liquid Phase Reaction A B Follows The Rate Equation R Kcacs And Is Carried Out In A Ba 1 (72.53 KiB) Viewed 44 times

1. The exothermic elementary liquid-phase reaction: A+B_* > Follows the rate equation r=kCACs and is carried out in a batch reactor. The reactor is initially charged with equal concentrations of A and B and no C, CA = CBo = 2 mol/L; Cco = O and initial temperature is 27°C. The temperature dependence of the rate constant is given by: E k=0.01725L/(mol-min) k=k, exp where = 300K R TT E, R=2600K Additional data: AHR = -10kcal/mol of A; partial molar heat capacities, pCp= 80 cal /(L K), V = 1200L (a) How long does it take to reach 95% conversion if the reactor operates isothermally at 27°C? (b) How long does it take to reach 95% conversion if the reactor operates adiabatically (no heat exchange with the environment)? Plot CA and T versus time for this case. (c) Plot CA and T versus time for the nonadiabatic case with heat exchange: UA/V = 0.01 kcal / (min L K) and the temperature of the heat transfer fluid is constant at Tc = 27°C. (d) Assume the batch is ruined if the temperature exceeds 350K during the run. What value of heat-transfer coefficient (UAc/V) should you design achieve so that this temperature is not exceeded. How long does it take to reach 95% conversion with your design? (e) Continuing with part (d), how should you operate the reactor if you want to speed things up but cannot violate the 350K limit? Hint: I'm not asking for calculation, just a description of how would you operate your reactor.