A rotating packed bed (RPB) reactor has substantially potential for the process intensification of heterogeneous catalytic reactions. However

the scarce knowledge of the liquid-solid mass transfer in the RPB reactor is a barrier for its design and scale-up. In this work

the liquid-solid mass transfer in a RPB reactor installed with structured foam packing was experimentally studied using copper dissolution by potassium dichromate. Effects of rotational speed

liquid and gas volumetric flow rate on the liquid-solid mass transfer coefficient (

k

LS

) have been investigated. The correlation for predicting

k

LS

was proposed

and the deviation between the experimental and predicted values was within ±12%. The liquid-solid volumetric mass transfer coefficient (

k

LS

a

LS

) ranged from 0.04-0.14 1

-1

which was approximately 5 times larger than that in the packed bed reactor. This work lays the foundation for modeling of the RPB reactor packed with structured foam packing for heterogeneous catalytic reaction.