lec06_02232007_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 6: Concentration that Optimizes a Desired Rate This lecture covers: Selectivity vs. conversion and combining reactors with separations. A P, A, U Separator Purer P (A, U) recycle A (U, P) Optimal - What is the target? goal? Æ Often it is to maximize profit or production product byproducts Figure 1. Schematic of a reacting system with a recycle stream. const. (vol.) Simple Target: maximize Fr pp =⋅ V r (concentrations, T) p Constraint: TT max High temperature Æ maximum rate constant Simplest Case: A P rk p = [ A ] [ AA ] ⇒ [ ] feed τ 0 residence time in reaction [] [] [] V FP p == V 0 P (1 e Da ) = Vk A feed Da Constraint: [ PP ] ≥ [ ] ( purity constraint min ) Æ X X conversion min F p =− kT () max {[ A ] 0m [ P ] i } V = n max [ A ] feed V ( 1 X ) 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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lec06_02232007_g - 10.37 Chemical and Biological Reaction...

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