The Influence of Calcium Hypochlorite on Performance and Dynamics Characteristics of Simultaneous Desulfurization and Denitrification of Urea Aqueous Solutions

The influence of Ca(ClO)₂ on performance of simultaneous desulfurization and denitrification of urea aqueous solutions were investigated in the self-designed small-scale bubbling reactor, and kinetics parameters and equations of simultaneous desulfurization and denitrification of urea/Ca(ClO)₂ were calculated through analyzing reaction products. The results show that with additive concentration raised, desulfurization efficiency is not dramatically increased, denitrification efficiency is increased by a big margin, but the increase rate of denitrification efficiency become slower when the amount of additives is more than 0.2%, and the reaction order of urea consumption rate equation and ammonium ions formation rate equation is zero, the equations can be expressed by linear equations, Ca(ClO)₂ does not change reaction order, but increase reaction rate and reaction rate constant.