A new approach to fluid separation modelling in the columns equipped with structured packings

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H2S and CO2

“…The packing segment can be visualized as a set of channels formed from counter-course installation of corrugated sheets. The detail of the shape of a segment of a typical corrugated sheet structured packing is given elsewhere [9]. Channels formed by corrugated sheets cross each other at an angle of ϕ and are assumed to have identical cross-section areas.…”

“…Based on previous studies [7,9,15], we assume that: -the gas flow through a packing segment can be approximated by a flow through a bundle of channels with dimensions derived from the corrugation geometry of Figure 1; -channels are round; -the gas and liquid flows in the channels are laminar and fully developed; -under influence of gravity (as in this case), liquid generally tends to move in the form of laminar films at the minimal angle with the column axis, corresponding to the gravity flow angle α (see Fig. 2); -gas and liquid are ideally mixed at certain points dictated by geometric configuration.…”

“…In some other studies liquid motion is approximated by the film flow over an inclined surface [16,17]. A fairly comprehensive literature survey about structured packings was done by Shilkin et al [9].…”

“…It should be noticed that taking even these idealistic conditions usually results in good and valuable knowledge of the process and paves the way for reliable design on an industrial scale. In the present paper geometric calculations, phase boundary localizations and conditions used in the modeling of Shilkin et al [9] are applied for mathematical modeling of chemical absorption of acid gases into MDEA in a structured packed bed. The geometric calculations regarding the packings as well as velocity equations for gas and liquid are similar to those utilized in Shilkin's work.…”

“…The effective purification of this energy source requires more sophisticated equipment since a huge amount of gas should be processed daily. The new generation of columns, called structured packed beds, which offer better mass transfer and relatively low pressure drop, are one such type of equipment [1][2][3][4][5][6][7][8][9]. Mathematical modeling of absorption of acid gas into MDEA (methyl diethanol amine) in structured packing requires a comprehensive model for liquid and gas flow in the bed.…”