A one-dimensional unstable heterogeneous mass transfer model was proposed and solved theoretically for the absorption enhancement of a sparingly soluble gas by dispersed micro particles.The enhancement factor was derived based on the surface renewal theory. The absorption of carbon dioxide into water with the added micro activated carbon particles was investigated experimentally in a thermostatic reactor

and the enhancement factors were measured at different solids loadings and stirrer speeds. The experimental data agreed well with the model predictions

and showed that the present model had high prediction accuracy.