Correlations for Catalysts with Different Macroscopic Symmetry

20-2 CORRELATIONS FOR CATALYSTS WITH DIFFERENT MACROSCOPIC SYMMETRY 

Flat-slab catalysts have the appearance of wafers, and a rectangular coordinate system is most appropriate to exploit the symmetry of the macroscopic boundary. The catalyst has a thickness of T in the thinnest dimension, which is the 

The effectiveness factor correlation given by equation (20-9) contains the following group of terms that is based solely on geometry AV cataiyst/ extemai-As mentioned previously in this book, the characteristic length L required to make the important spatial variable dimensionless in rectangular coordinates is one-half the thickness of catalysts, measured in the thinnest dimension. Hence,  

These definitions are consistent with the following properties  

r] = 0 along the symmetry plane that slices the catalyst parallel to the flat-slab surfaces and normal to the lateral surface. 

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