An absorption efficiency of sieve plate column to remove nitrogen oxides with water was studied. The experimental tests were conducted at varying system conditions such as gas concentrations, flowrates as well as sieve porosities. The data collected from experimental measurements were analysed to give an account of nitrogen oxides removal efficiencies.
The absorption process was supposed to accompany chemical reaction of NO_x with water to produce HNO₃ and HNO₂ in the liquid phase. The subsequent dissociation of HNO₂ resulting in the formation of HNO₃ and giving off gas product NO, the latter is oxidized in the free board by O₂ of air flow thus completing the process. It is assumed that this process repeats in the course of absorber operation.
The validity of the theoretical model proposed in this study was shown by the good agreement with expermental results.