Page 170 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
P. 170

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                                                    Raschig Super-Ring








                                              Third Generation (Late 1970's- 199O's}
                                        CMR Ring    Nutter Ring  IMTP Ring Fleximax






                                          Second Generation (Late 1950' s- Early 1970'si
                                                    Pall Ring   Intalox Saddle






                                                 First Generation {1895 - 1950)
                                                 Raschig Ring      Beri-Saddle





                          Fig. 11. Scheme of the history of development of the random packings after the time of Gay-
                          Lussac [321].



                          3.2.1.2.1.1.2. Equation for determination of the presswe drop

                          3.2.1.2.1.1.2.1. Presstire drop of dry packings
                                 The pressure drop of a dry packing can be calculated using the
                          equation:



                                                                                             (6)
                                   dk   2


                          where AP 0 is the pressure drop in Pa;
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