13-Lect-MembraneRctrs0

13-Lect-MembraneRctrs0 - Outline Membrane Reactors(Fogler...

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1 Chemical Reaction Engineering - Musgrave Membrane Reactors Lecture 13 - Page 1 Outline: Membrane Reactors (Fogler 4.9) Next Time: (Fogler 4.10) 1. Unsteady State Operations (Fogler 4.10) F B F D F C Sweep gas F A0 F A F C,P F C,P Membrane C 2A+2B C+D+E+F Chemical Reaction Engineering - Musgrave Membrane Reactors Lecture 13 - Page 2 E A Δ H rxn P(E) E K eq = C C c C D d C A a C B b = exp −Δ H rxn k B T Some reactions are severely limited by equilibrium: • Conversion limited by equilibrium concentrations, • Reverse reactions compete with forward reactions, • Increasing T only shifts equilibrium towards reactants (exothermic rxns), • Lowering T severely reduces the reaction rate.
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2 Chemical Reaction Engineering - Musgrave Membrane Reactors Lecture 13 - Page 3 Membrane reactors contain a membrane to combine reaction and separation . C + D A + B K eq = P C c P D d P A a P B b = exp −Δ H rxn k B T The membrane selectively allows a product species to leave, forcing equilibrium towards the right (Le Chatelier). See Lect. 6 A + B C + D A + B C + D A + B C + D Forward Reverse Equilibrium Irreversible Outer shell Membrane Permeate flow Feed and Retentate flow C F B F D F C Sweep gas F A0 F A F C,P F C,P Membrane C Chemical Reaction Engineering - Musgrave Membrane Reactors Lecture 13 - Page 4 Membrane reactors contain a membrane to combine reaction and separation . A + B E + F K eq = P C c P D d P A a P B b = exp −Δ H rxn k B T The membrane selectively allows a product species to leave, increasing equilibrium towards the removed product
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This note was uploaded on 04/25/2010 for the course CHEN 4330 taught by Professor Staff during the Spring '08 term at Colorado.

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13-Lect-MembraneRctrs0 - Outline Membrane Reactors(Fogler...

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