The kinetic phase diagram for the catalytic oxidation of SO2 by manganese salts is determined with the partial simulation method on the basis of the CA model, only the Langmuir-Hinshelwood mechanism is considered and H2O is assumed to be originally in the gas phase, simulation results show that, if no desorption of adsorbed species is considered, the phase diagram has four two-species poisoned phases and one reaction phase which is a linear region; and the other hand, when the desorption of H2O is taken into account, the region of the reaction phase will be extended.

Key words: SULFUR DIOXIDE, MANGANESE COMPOUNDS, CATALYTIC OXIDATION, PHASE DIAGRAM