Page 148 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
P. 148

143


                                                                             z
                                 Ni in Figs. 18-20 is the number of drip points per m .
                                 Because the experimental installation operates at condition of a total
                          reflux, the operating line coincides with the diagonal in the X-Y diagram, Fig.
                          9, Chapter 1.
                                 The number of mass transfer units and the number of the theoretical
                          stages can be determined according to paragraph 1.5.4.2.3.
                                 Physical properties of some test systems, largely used for experiments
                          in hot stand, are presented in Table 1 [86].



                             Table 1. Physical properties of some test systems largely used for experiments in hot stand
                          System                      P         PG       %xl0  s  PL     v £ xl0  8
                                                                                          2
                                                      mbar      kg/m 3   H1 /S   kg/m 3  m /s
                                                                          2
                          Methanol/ethanol             1000     1.30     8.5     738     0.52
                          Ethanol/water                1000     1.29     8.4     791     0.50
                          Chlorobenzene/ethylbenzene  33        0.14     46,0    963     0.60
                          CMorobenzene/ethylbenzene   67        0.27     28.9    949     0.52
                          Chlorobenzene/ethylbenzene   133      0.51     15.9    926     0.54
                          Chlarobenzene/ethylbenzene   266      0J6      8.8     905     0.39
                          Chlorobenzene/ethylbenzene   532      1.8      4.9     886     0.34
                          Chlorobenzene/ethylbenzene   1000     3.28     2.9     866     0.30
                          Toluene/n-octane             100      0.35     20.8    839     0.52
                          Toluene/n-octane             133      0.46     16.4    833     0.49
                          Toluene/n-octane             266      0.90     8.5     763     0.43
                          Trans-/eis- Decahydronaphtalene  13   0.06     105.8   844     1.24
                           1,2 Diehloroethane/toluene  1000     3.22     2.9     924     0.38
                           Ethylbenzene/styrene        133      0.48     15.9    833     0.45





                           Nomenclature



                                                - attenuation;

                                                        2
                                                           3
                           a- packing specific surface area, m /m ;
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