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A non-thermal plasma oxidation-alkali absorption NO removal system is designed by connecting sequentially an alkali aqueous solution absorption device to a gas discharge reactor. An experimental system of simulated flue gas NO removal using non-thermal plasma oxidation and Ca(OH) 2  aqueous solution absorption was established and influences of the concentrations of O 2  and H 2 O vapor on this kind of NO removal method were studied experimentally. The experimental results show that oxidation of NO in non-thermal plasma can be promoted by H 2 O vapor and the overall NO removal efficiency under this condition is higher than that of the system without H 2 O vapor added, which can be up to 7%. Due to the existence of O 2  in the present system, Ca(OH) 2  aqueous solution can play a certain role in improving the NO removal efficiency and the NO removal efficiency can increase by 10%-14% under this condition using the alkali absorption. When O 2  is added into the system and Ca(OH) 2  aqueous solution absorption device is connected sequentially to the non-thermal plasma reactor, the NO removal efficiency is enhanced after H 2 O vapor is added in the present system, which can obviously increase by 7%-17%.

Experimental Study on NO Removal Using Non-thermal Plasma Oxidation-alkali Absorption