Page 250 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

240

Zech and Mersmann [286] presented the equation:

2 2
,e + 0.012 (l-e)D G w 0 p G
(144)

C is an experimental constant depending on the packing construction.
In Table 18 some other equations for calculation of the gas-side
controlled mass transfer coefficient are presented.

3.2,1,2.1.6.1.2. Coefficient for the dispersion model
Using the method described in part 2.1.2.4.2. and equation (118) for
calculating the Bodenstein, respectively the Peelet number, and also Eq.(142)
for calculating the gas-side controlled mass transfer coefficient for the piston
flow model, it is possible to obtain the respective data for the mass transfer
coefficient for the diffusion model. The data for both coefficients are plotted in
Fig. 37. [131]. The symbols are explained in Table 18.

Table 18. Other equations for calculation of the gas-side controlled mass transfer coefficient
Autor Equation
/• \B.s
Van Krevelen and Hoftijzer [133] k G=0.20 -~ ° G Sc G

S
Shulman and DeGouff, cited after ^ = g 0J37(w 0p G f
[285]

Billet [287] C T^I1 ^Tlo Sc G