CHE442 Final 2001

CHE442 Final 2001 - FINAL EXAM ChE 442 Fall 2001 NAME S.S 1...

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FINAL EXAM ChE 442, Fall 2001 NAME: S.S.: 1. A first order reaction A->B takes place in an adiabatic flow reactor. Only pure A enters the reactor. You are given the following data: r=kC A , k=1.0hr -1 at T=300K. E=1,000J/mol, F A0 =1,000 mol/hr. C A0 =10 mol/m 3 . C PA =C PB =100 cal/molK. ΔH rx =- 25,000 cal/mol. T 0 =300 K. Calculate the volumes of a CSTR required to attain 80% conversion? 1
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2. For the elementary solid-catalyzed liquid-phase reaction A  B. r=k(C A -C B /K e ) ΔH rx =-84,300 J/mol, C PA =C PB =210 J/molK, K e =100,000 at T=300 K. The reaction is first carried out in a single adiabatic reactor. Assuming that only pure A at a temperature of 300 K is fed into the reactor and that the reactor reaches equilibrium calculate the exit temperature and conversion. Subsequently it was decided to add a second reactor following the first reactor. The feed into the second reactor is the exit stream from the first reactor after it has been cooled down to 350 K. Assuming that the second reactor also reaches equilibrium calculate its exit temperature and conversion.
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