摘要
分别在鼓泡反应器和填料吸收塔中研究了Na2SO3/MEA混合水溶液对室内空气中微量NO2的净化过程。在鼓泡反应器中,蒸馏水以及MEA水溶液对NO2的净化效率较低,Na2SO3水溶液对NO2的净化效率较高,且Na2SO3的浓度越高,净化效率越高;Na2SO3容易被空气中的O2氧化,当向溶液中加入少量的MEA时,能够很好地抑制Na2SO3与O2的氧化反应,混合溶液对NO2的净化效率基本不随时间的增加而改变。在填料吸收塔内,气体流量与Na2SO3的浓度是影响净化效率的主要因素,液体流量以及进口气体中NO2的含量对净化效率的影响较小。
The process of NO2 removal from indoor polluted air by using aqueous solutions of Na2SO3 in a NO2 absorber and a random packing tower was conducted. In NO2 absorber, the removal efficiency in Na2SO3 is much higher than that in distilled water and monoethanolamine （MEA）. The removal efficiency increases with the increase of Na2SO3 concentration. Because of the oxidation of Na2SO3, NO2 removal efficiency decreases sharply. An addition of some organic compounds such as MEA, sulfite oxidation was effectively inhibited and NO2 removal efficiency remained indeclinable. Experiments by using the mixtures of Na2SO3 and MEA to remove NO2 from indoor polluted air were also carried out in the packing tower. The tests showed that gas flow rate, liquid flow rate, the concentration of Na2SO3 and the concentration of NO2 in inlet gas become the important factors affecting the removal efficiency of NO2. But the gas flow rate and the concentration of Na2SO3 are the critical factors.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2005年第6期40-43,共4页
Chemical Engineering(China)
基金
国家'985工程'资助项目
