Abstract: Removal of NO by nonthermal plasma combined with in situ absorption was experimentally investigated with a wire-in-tube pulsed corona reactor. High pulse voltage was applied to the wire of the reactor and the tube was grounded. For the reactor combined with in situ absorption, the grounded electrode was covered by a Ca(OH)₂ layer as the sorbent for in situ capture of the NO oxidation products. It was found that NO removal was much higher by the reactor combined with in situ absorption than by the reactor without Ca(OH)₂ sorbent, and meanwhile the outlet NO2 concentration from the reactor was also suppressed to less than 12 mg•m^-3.It was indicated that in situ absorption of the NO₂ or NO₃ by Ca(OH)₂ was responsible for the promotion of NO removal. The existence of O₂ and water vapor in the gas stream was beneficial for gas-solid absorption reaction, therefore resulting in the increase of NO removal.

摘要： 采用电晕结合现场化学吸收的方法对NO的去除效果进行了实验研究.电晕反应器为线筒式结构，作为吸收剂的Ca(OH)₂均匀地覆盖在筒壁的内表面.实验表明此法能有效地除去气流中的氮氧化物，NO的去除率大大高于反应器内没有固体吸收剂的情况，同时反应器出口NO₂的浓度小于12 mg•m^-3.可以认为反应器内的Ca(OH)₂吸收剂与NO的氧化产物NO₂或NO₃的吸收反应促进了NO的分解反应.研究还发现在气流中有氧气和水分存在时有利于NO的氧化反应和气固吸收反应，从而提高了NO的去除率.