https://doi.org/10.1007/s11356-022-20859-x
”
The three-dimensional geometric model, used in the CFD simulation, reflects the real RPB unit constructed at the Lodz University of Technology. The RPB unit was designed to conduct research on the process of CO2 absorption in aqueous amine solutions. The asymmetric structure of the absorber makes it impossible to simplify the geometry to two dimensions or to a periodic object. The geometry does not include liquid outlets due to the preparation of a single-phase model for the gas phase. Air discharge through the liquid flow channels was not possible due to the use of a hydraulic closure. This allowed the geometry to be simplified without the risk of misrepresenting the real gas flow Fig. 2 and 3.
RPB unit and packing using as prototype to CFD simulations and generation of validation data
Phase contact diagram in RPB unit
In this study, porous packing was used. The main dimensions of packing were the following: 10 mm height, 146 mm inner diameter, 600 mm outer diameter; the specific area was 2800 m2 m-3 and the porosity 0.922. The rotational speed of the bed varied from 150 rpm to 1500 rpm, and the gas flow rate ranged from 20 m3 h-1 to 60 m3 h-1. The described nickel-chromium foam packing was investigated experimentally in RPB, and the experimental and simulation results were compared.
“