[Gates] 08WINTER - Quiz1 SOLN

[Gates] 08WINTER - Quiz1 SOLN - r j = (l / V)(dN 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 of4L. 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 I dV Perfectly mixed batch
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Unformatted text preview: r j = (l / V)(dN j / dt) = de j / dt Note that F j = c j v -----(j) PF hI' , Ci. pli lit ::; dv ~ ~ ~ zrcm,/i) CrnJ/! ) v?/) JflIJ1 U /. 3 o. J 1. 3 _ p. ~ 3 b.9 2. o· , _(). 2/ .3 0. 6 '/ -o.lf ~ o. 1/8 _P.O) p. 3.t ~ ~ 0.3 2 ~,., jfl,'t. . FA vJ· II rA- :: Arlo. vrulu fh~ ~flJr. ~ :i tJ v J {~ h. m Gt oJ, (JJ. -------- --~U H~ I l ;-11 I j I--~ II I I 1/ llJ ~i t j I 1m I -l' '--f + I, I -n---H i} -t + ----- - . -----------"\ --I \-.---I . I ------1 f'~ ] I I N ---{;,. .::c o.){D.r,;:.~= (". :: o. t ,.,.1/. .1 ~~ / :~ t'" = o· r IJJ,II L , J41IYf -l-(~) c;, &,.IIJ) -FA ~ <f,3 b. '1 "/. 1 o.r,t/ fR·? o·lffJ VJ 0.32. _ L (A '. vs r~m .f~l Jro/J4 (JI r" ,.., J.. </'2 £/m1h tJ. ,. TY'l' I -fA @ ~:= 7/ m~1 G,~ D. 0/ '.!H. f I -L ,... '7. (, 11 m;n -fA -..L /1'1" I .., 2. 3 s . -t -Q ell-:. . ':t. . • r-:-. . ~ ).,.,i ~!: :..-"'1+~H-I-- -!+ ++-I-H-f -+H4.+-l-+4 Lttttttt-p ......
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This note was uploaded on 02/13/2011 for the course ECH 146 taught by Professor Faller during the Winter '08 term at UC Davis.

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

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