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

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, k_La, 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 k_La
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, k_Ga, 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 k_Ga data for mentioned structured packing types have
not been till this time published.