CBP-TUCLecture8

CBP-TUCLecture8 - Chemical & Biochemical...

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Unformatted text preview: Chemical & Biochemical Processes Chemical Reaction Engineering Multiple Reactor Systems Page 124 Multiple Reactor Systems Plug flow Stirred tanks In series And in parallel Multiple Reactor Systems. 1. Plug Flow Reactors. (a) Consider n plug flow reactors connected in SERIES. For the ith reactor: V R (total) = = - +- +- =- n n X X X X X A A A A A A A r A A A n A n n r dX r dX r dX F V 1 1 2 1 1 ) ( .......... ) ( ) ( - = n A X A A A r dX F ) ( n 1 2 3 4 i Hence, n plug flow reactors in series give the same conversion as a single plug flow reactor of same total volume. (b) Consider n plug flow reactors connected in Parallel. V r1 V r2 V r3 V r4 /4 /4 /4 /4 If V r1 V r2 V r3 V r4 then if flow is split equally down each reactor, conversion is the same as for ONE large reactor of same total volume. V R (total) = = n n r n V 1 - = n A X A A A r dX F ) ( N.B. 2V V 2/3 1/3 Conversion same as for 1 reactor of total volume 3V 2. CSTR If flow is split equally then X A (parallel) X A single tank, but suppose we take a single tank and add another of...
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This note was uploaded on 06/06/2011 for the course CHEM 3040 taught by Professor Reddy during the Spring '10 term at Taylor's.

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CBP-TUCLecture8 - Chemical & Biochemical...

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