(71d) Transport Characteristics of Modern Structured Packing Types for Absorption and Distillation Columns (Mellapak250Y, 350Y, 452Y, 500Y)

Authors: 
Rejl, F. J. - Presenter, Institute of Chemical Technology, Prague (ICT)
Valenz, L. - Presenter, Institute of Chemical Technology, Prague (ICT)
Linek, V. - Presenter, Institute of Chemical Technology, Prague (ICT)


The work presents absorption transfer characteristics for modern and
industrially often used structured packing types Mellapak250Y, 350Y, 452Y a
500Y. The characteristics were determined using the standard measuring methods
(Rejl et. al., 2009). Liquid side volumetric mass transfer
coefficient, kLa, were
determined using an absorption system O2/air
? water, in which the main mass transfer resistance is on the liquid side.
Oxygen desorption from water into a stream of nitrogen were used (Linek et al.,
1984). The kLa
values were calculated from the readings of oxygen probes in liquid samples
obtained from the ?head' and ?bottom' of a packing. Gas side volumetric mass transfer
coefficient, kGa,
were determined using an absorption
system SO2 (0.03 vol. %) /air ? 1 MNaOH solution. In
this absorption system, the main resistance against mass transfer is on the gas
side. For effective interfacial area
measurement, chemical method using absorption of diluted CO2 from
air (1 vol. %) into a NaOH solution of initial
concentration 1 kmol/m3 were used. Characteristics were obtained in the flow range commonly used
in the course of absorption operations, and of vacuum and atmospheric
distillation operations. The kGa data for mentioned structured packing types have
not been till this time published.