Transport Process and Unit Operations C.J. Geankoplis

Transport Process and Unit Operations 3rd Edition Christi J. Geankoplis

3.1-5.   Surface Area In Packed Bed

            A packed bed is composed of cubes 0.020 m on a side and the bulk density of the packed bed is 980 kg/m3. The density of the solid cubes is 1500 kg/m3.

           (a)     Calculate ε, effective diameter Dp, and a.

          (b)     Repeat for the same conditions but for cylinders having a diameter of D = 0.02 m and a length h = 1.5D.

Solving:



3.1-6.   Derivation for Number of Particles in a Bed of Cylinders

            For a packed bed containing cylinders where the diameter D of the cylinders is equal to the length h, do as follows for a bed having a void fraction ε.

                       (a)     Calculate the effective diameter.

                       (b)     Calculate the number, n, of the cylinders in 1 m3 of the bed.

Solving:


3.1-10. Mean Diameter of Particles in Packed Bed

             A mixture of particles in packed bed contains the following volume percent of particles and sizes: 15%, 10 mm; 25%, 20 mm; 40%, 40 mm; 20%, 70 mm. Calculate the effective mean diameter, Dpm, if the shape factor is 0.74.

Solving:



There is several solved problem, i'll write another in next.
If you find a mistake or have question, you can used the comment section below. Thanks

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