e1992 - ChE 344 Chemical Reaction Engineering Winter 1999...

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Unformatted text preview: ChE 344 Chemical Reaction Engineering Winter 1999 Exam I Part 2 (20%) Open Book, Notes, and Disk Closed Web Name_______________________________ I have neither given nor received aid on this examination nor have I spent more than one hour working on Part 2 of this exam. Signed____________________________________________ Start Time Finish Time The gas phase reactions take place isothermally in a membrane reactor packed with catalyst. Pure A enters the reactor at 24.6 atm and 500K and a flow rate of A of 10 mol/min A B + C r 1C = k 1C C A- C B C C K 1C A D r 2D = k 2D C A 2C + D 2E r 3E = k 3E C C 2 C D Only species B diffuses out of the reactor through the membrane. At what point in the reactor is the (a) the concentration of B is a maximum at W = (b) the concentration of C is a maximum at W = (c) Explain why the curves look the way they do. (d) Vary k 1C (.1 to 1000) and write a paragraph describing what you. Explain whether or not what you observe is reasonable. Additional Information Overall mass transfer coefficient k B = 1.0 dm 3 /kg catmin k 1C = 2 dm 3 /kg catmin K 1C = 0.2 mol/dm 3 k 2D = 0.4 dm 3 /kg catmin k 3E = 5 dm 9 /mol 2 kg catmin W f = 100 kg A The gas phase reactions take place isothermally in a membrane reactor packed with catalyst. Pure A enters the reactor at 24.6 atm and 500K and a flow rate of A of 10 mol/min A B + C r 1C = k 1C C A- C B C C K 1C A D r 2D = k 2D C A 2C + D 2E r 3E = k 3E C C 2 C D Only species B diffuses out of the reactor through the membrane. At what point in the reactor is the (a) the concentration of B is a maximum at W = (b) the concentration of C is a maximum at W = (c) Explain why the curves look the way they do. (d) Vary k 1C (.1 to 1000) and write a paragraph describing what you. Explain whether or not what you observe is reasonable. Additional Information Overall mass transfer coefficient k B = 0.2 dm 3 /kg catmin k 1C = 2 dm 3 /kg catmin K 1C = 0.2 mol/dm 3 k 2D = 0.4 dm 3 /kg catmin k 3E = 5 dm 9 /mol 2 kg catmin W f = 100 kg B The gas phase reactions take place isothermally in a membrane reactor packed with...
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e1992 - ChE 344 Chemical Reaction Engineering Winter 1999...

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