A study on the oxidation of calcium sulfite catalyzed by Mn2+ is presented in this paper. A laboratory-scale well-mixed thermostated reactor was used, with continuous feeding of both gas and liquid phase. The gas phase was a mixture of oxygen and nitrogen, with O2 partial pressure varying from 5.1 to 40.5 kPa. The liquid phase was obtained by mixing inside the reactor two separate aqueous solutions, one obtained by dissolving Ca(OH)2 into a SO2 solution, and the other one containing manganous sulfate. The temperature was kept constant in all the experiments at 45°C. The results show that increasing catalyst concentration, the transition takes place from slow kinetic to slow diffusional and eventually to fast reaction regime.

cited By 49; Conference of Proceedings of the 1998 15th International Symposium on Chemical Reaction Engineering, ISCRE 15 ; Conference Date: 13 September 1998 Through 16 September 1998; Conference Code:55226