lec05_02212007_g - 10.37 Chemical and Biological Reaction...

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10.37 Chemical and Biological Reaction Engineering, Spring 2007 Prof. William H. Green Lecture 5: Continuous Stirred Tank Reactors (CSTRs) This lecture covers: Reactions in a perfectly stirred tank. Steady State CSTR. Continuous Stirred Tank Reactors (CSTRs) Continuous Plug Flow Reactor CSTR Open system Steady State Well mixed Open system Steady State Continuous Batch In terms of conversion, X A ? Mole Balance on Component A In-Out+Production=Accumulation FF (steady state) Ao −+ A r A V = 0 What volume do you need for a certain amount of conversion? FX V = A oA r A where r A is evaluated at the reactor concentration. This is the same as the exit concentration because the system is well mixed. For a liquid phase with constant P: FC = ( =volumetric flow rate) Ao Ao v 00 v Ao VF == A A F Ao X A F r Ao A Figure 2. A batch reactor. Figure 1. A plug flow reactor, and continuous stirred tank reactor. AA = v 0 V CX = A vr 0 A V τ =← average time a volume element of fluid stays in the reactor v 0 Cite as: William Green, Jr., course materials for 10.37 Chemical and Biological Reaction Engineering, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu), Massachusetts Institute of Technology.
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This note was uploaded on 11/27/2011 for the course CHEMICAL E 10.302 taught by Professor Clarkcolton during the Fall '04 term at MIT.

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lec05_02212007_g - 10.37 Chemical and Biological Reaction...

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