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[Gates] 08WINTER - Quiz1 SOLN

# [Gates] 08WINTER - Quiz1 SOLN - r j =(l V(dN j dt = de j dt...

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Quiz 1 (1114/08) ECH 146, Winter 2008 ICLOSED BOOK] TIME ALOTTED: 20 MINUTES 1. A steady state reaction A ~ B was carried out at constant temperature in a plug flow reactor (PFR). The initial concentration of A was 1.5 mol/L. There was no volume change and the volumetric flow (v) was 1 @min. There were no other components in the feed. L Data obtained for this reaction in the PFR are shown in the table below: Concentration of A in the product stream (mol/~ L Volume of the reactor (L) 1.3 0.5 0.9 2 0.64 3 0.48 4 0.32 6 a) (l pt) Estimate the rate of the reaction, rA, at a volume of 4L. b) (3 pts) Estimate the time required for the initial concentration of A (CAo) to become Yz CAo (i.e. C A = Y2 CAo) in a batch reactor operated at the same temperature when CAo = 0.8 mol/L. CAo: the initial concentration of A. Ideal reactor type Design (mol balance) equation Steady-state CSTR r j = (F j - F jO ) I V Steady-state PFR r j = dF j

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