Page 149 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
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                                                                       2  3
                           a e- effective specific surface area of the packing, m /m ;
                           Bo c- Bodenstein number for the measuring cell.
                           BOQ- Bodenstein number for the gas phase;
                                    rrj
                           Bo L =      r - Bodenstein number for the liquid phase;
                                  H d.D L
                                                                                              3
                           C G1 and C Gr the initial and end concentrations of the absorbed gas in mol/m ;
                           COH- concentration of OH ions;
                                                                                             3
                           C Li and Cu - the initial and end concentration of CO2 in the water in kmol/m ;
                           C\t)- concentration (or conductivity) of the tracer after the packing as a
                           function of the time t measured from the moment of feeding of the tracer in
                           form of a S function;
                           C E - conductivity of the liquid without tracer, S/m;
                                                                                       2
                           D- diffusivity of the absorbed component, CQ2, in the liquid phase, m /s;
                                                       2
                           D L - axial mixing coefficient, m /s;
                                                                            2
                           D c - axial mixing coefficient in the measurement cell, m /s;
                           d- diameter of the orifices in m;.
                                                2
                           g- gravity constant, m/s ;
                           H- packing height, m;
                           H c~ pressure drop as a column of liquid in m;
                           Ha- liquid holdup;
                           I o and I- gamma-ray passing through a medium, before and after the absorption
                           of the radiation flux by the medium, counts/s;
                           H ae - end effect in the measurement of the liquid holdup;
                           Kca- volumetric mass transfer coefficient for the gas phase -1/s;
                           k? - mass transfer coefficient in absorption controlled by a first or pseudo-first
                           order fast chemical reaction, in m/s;
                           k L - liquid-side controlled mass transfer coefficient, m/s;
                           kc - gas-side controlled mass transfer coefficient, m/s;
                                                       3  2
                           L- liquid superficial velocity, m /(m s);
                           /- length of the attenuating medium, m;
                           4- the way of the liquid phase in the measurement cell in m;
                           m- equilibrium constant of the absorption process, not accounting for the
                           chemical reaction;
                                                       2
                           Nj~ number of drip points per m ;
                           P a- atmospheric pressure, bar;
                           PQ- normal pressure, bar;
                           Pea- Peclet number for the gas phase;
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