lec22_05042007_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 22: Combined Internal & External Transport Resistances Packed Bed Reactor Æ use PFR equation eff i i dF Ar dz = z=0 z=L Figure 1. Packed Bed Reactor eff chem i i r r Æ eff chem i i r r = Ω if ? 1 Ω ≈ if ? 1 Ω ± ( ) –weird 1 Ω > porous catalyst particle d p BL: δ Figure 2. Porous Catalyst Particle Biot Number: external heat transfer resistance internal heat transfer resistance i B Mass transfer Biot Number: 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. Downloaded on [DD Month YYYY].
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