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Molar reaction Gibbs function change, molar reaction enthalpy change, equilibrium constant and the equilibrium partial pressure of SO2 and NO for the reaction of simultaneous removal of SO2 and NO by using NaClO/ammonia solution were calculated based on the principle of chemical thermodynamics. As can be seen from the results, simultaneous removal of SO2 and NO by using NaClO/ ammonia solution is available.

Limestone dissolution rate was measured by a pH-stat method with CO(2) sparging and dissolved sulfite. The dissolution rate of limestone under these conditions was found to be controlled by mass transfer and surface kinetics. As can be seen from the results, in the presence of sulfite, limestone dissolution rate increases with increasing stirring speed, reaction temperature and CO(2) partial pressure. The crystallinity of limestone has a great impact on the dissolution rate: The lower the value of the crystallinity of limestone is, the higher the dissolution rate is. The presence of sulfite promotes the dissolution rate when pH value is below 5.5 but inhibits it when pH value is above 5.5.