Packing-specific geometric data

The resistance coefficient i[f for a given packed bed, whose packing-specific geometric data a and e is known, can be determined for any given experimental data Apo/H and factor Fv using the transposed Eq. (3-8) ... 

In order to determine the pressure drop Ap/Apo, acc. to Eq. (4-7) or (4-9), it is necessary to know the specific geometric data of the packing element a and e as well as the packing-specific constants x and (j) and the total liquid hold-up hp. The latter can be determined by using one of the models found in literature [12, 44], as quoted in Sect. 4.2. 

The experimental data qualitatively confirm the geometrical model presented in Fig. 4. The reactivity is controlled by the monomer packing and not by the chemical nature of the substituents. In many cases different modifications of a specific monomer can be obtained which exhibit drastic differences in reactivity However, it should be emphasized at this point that the packing parameters give no absolute scale for... 

The maximum packing volume of a filler can be calculated for different geometrical arrangements, determined after the filler is dispersed in a liquid media (e.g. oil). It is calculated by dividing the tamped bulk density by specific gravity of filler. Table 5.8 compares the data obtained from calculation for monodispersed spheres in different arrangements with determined values. 

To apply this equation, which is based on the evaluation of experimental data and valid in the range of Reynolds numbers Rey (200-20000), it is necessary to ascertain the geometric packing data a and s as well as the proportion of the perforated surface area of the packing wall (pp. This parameter is a form-specific packing factor, also known as form factor (pp. 

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