Foam in Absorption Columns with Structured Packings – Part 2: Inhibition and Destruction
Foam in absorption and distillation processes is one of the main reasons for malfunctions in columns including higher pressure loss, lower throughput, and lower mass transfer rates leading to a reduction in the separation efficiency. This study evaluates different foam management solutions aiming at a foam‐reduced operation of columns with structured packings based on fundamental investigations. Firstly, the effect of spacers between structured packing layers is presented as a passive foam inhibition method. Secondly, the ability of acoustic waves at low frequencies around 50 s−1 (Hz) destructing existing foam in columns is analyzed and discussed. This method is able to reduce the pressure loss by –56 % and increase the corresponding F‐factor by +22 % in a DN300 column in continuous operation.
Published in: Chemical Engineering & Technology, 10.1002/ceat.202200050, Wiley