lec21_05022007_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 21: Reaction and Diffusion in Porous Catalyst (cont’d) This lecture covers: Packed bed reactors A products eff A A dF Ar dz = D eff (actual is very complicated) Figure 1. Packed Bed Reactor Void Fraction φ ~.5 (, ,) Ajml Cxyz 1, 30 j = m = (points) l = ±²²³ ² ²´ (11-21) 2 0 fluid ii i i DCUCr ∇− + = Å in the fluid i=1, fluid species N 0 ˆ surface i surface C Dr n += (boundary condition for the above) Ergun’s Eq.: (4-22) ( ) 3 150 1 1 1.75 cp p dP G G dz g D D φμ ρφ =− + where T PR ρ = , z G U A = 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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10.37 Chemical and Biological Reaction Engineering, Spring 2007 Lecture 21 Prof. William H. Green Page 2 of 3 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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lec21_05022007_g - 10.37 Chemical and Biological Reaction...

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