The choice of filler types should consider the requirements of the separation process, usually the following aspects:
1) High mass transfer efficiency Generally speaking, the mass transfer efficiency of structured packing is higher than that of bulk packing.
2) The flux should be large. Under the premise of ensuring high mass transfer efficiency, packing with high flooding point gas velocity or gas phase kinetic energy factor should be selected.
3) The pressure drop of the packing layer should be low.
4) The packing has strong anti-fouling performance, easy to disassemble and repair.