051909_hw7

051909_hw7 - Department of Chemical Engineering University...

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1 Department of Chemical Engineering Spring, 2009 University of California, Santa Barbara CHE 140A Problem Set No. 7 Due Tuesday, May 26, 2009 Problem 1: Fogler, 5-6(a), pg. 296 The reaction AB C →+ was carried out in a constant-volume batch reactor, where the following concentration measurements were recorded as a function of time: t (min) 0 5 9 15 22 30 40 60 C A (mol/dm 3 ) 2 1.6 1.35 1.1 0.87 0.70 0.53 0.35 (a) Use nonlinear least squares (i.e., regression) and one other method to determine the reaction order α and the specific reaction rate. Problem 2: Fogler 6-6 (a-g), pg. 363 Consider the following system of gas-phase reactions: AX ⎯⎯→ 1/2 1 XA rk C = 31 / 2 1 0.004 (mol/dm ) min k =⋅ 2 BA C = 1 2 0.3 min k = A Y 2 3 YA C = 3 3 0.25 dm /mol min k B is the desired product, and X and Y are foul pollutants that are expensive to get rid of. The specific reaction rates listed are at 27 ºC. The reaction system is to be operated at 27 ºC and 4 atm. Pure A enters the system at a volumetric flow rate of 10 dm 3 /min. (a) Sketch the instantaneous selectivities ( // ,, BX BY SS and () ) / / BXY B X Y Sr r r =+ as a function of the concentration of C A .
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This note was uploaded on 12/29/2011 for the course CHE 140b taught by Professor Ceweb during the Fall '10 term at UCSB.

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051909_hw7 - Department of Chemical Engineering University...

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