Residence time distribution, axial liquid dispersion and dynamic–static liquid mass transfer in trickle flow reactor containing β-SiC open-cell foams

Open-cell foams are a promising new support for gas–liquid contacting and heterogeneous catalysis. Using the Piston-Dispersion-Exchange model, axial dispersion and dynamic–static liquid mass transfer coefficient are estimated from residence time distribution responses measured under co-current down flow configuration.The specific morphological parameters and the high porosity involved within open-cell foams result in low Bodenstein numbers (0.05 < Bo < 0.2 for 2.5 < Re < 20) in comparison to conventional packed beds (0.2 < Bo < 0.7 for 5 < Re < 23). Furthermore, open-cell foam improves liquid mass transfer coefficient between the dynamic and the static zones under trickle flow conditions.

► Axial dispersion and liquid mass transfer in SiC foam beds are studied.
► A low Bodenstein number (Bo < 0.2) in comparison to particles bed (Bo > 0.2) is obtained.
► SiC foam with a large specific surface area improves the liquid mass transfer.