摘要
为了减少工业排放氮氧化物(NOx)对大气造成的污染,需要去除难溶性的NO。活性氧簇(ROS)可以将NO氧化为水溶性NO2,超重力机可以强化气液传质效果。结合二者的优势,文章提出了一种在超重力环境下利用ROS氧化去除NO的方法。研究了吸收液pH值、转速、温度、气液比、气体浓度、吸收液循环对NO脱除率的影响,并对吸收产物进行了测定。结果表明,在20℃,H2O2浓度为1 mol/L,H2O2溶液pH为13,超重力机转速为1200 r/min时,NO的脱除效率最好。当NO体积浓度为500×10-6,气液比为100时,NO的脱除效率可达96%。NO最终变为NO3-存在于液相中,且该吸收液可以用于同步脱硫脱硝。
In order to reduce the air pollution caused by industrial emissions of nitrogen oxides(NOx),it is necessary to remove the insoluble NO.Reactive oxygen species(ROS)can oxidize NO to water-soluble NO2.Rotating packed bed can enhance the effect of gas-liquid mass transfer.Combining their advantages,a method of NO removal by ROS oxidation in HiGee environment is proposed.The effects of pH,rotational speed,temperature,gas-liquid ratio,gas concentration and absorption solution circulation on NO removal rate were studied,and the absorption products were determined.The results show that NO removal efficiency is the best when the temperature is 20℃,H2 O2 concentration is 1 mol/L,H2O2 solution pH13,and the speed of the rotating packed bed is 1200 r/min.When the volume percentage of NO is 500×10-6 and the gasliquid ratio is 100,the removal efficiency of NO can reach 96%.NO finally changes to NO3-and exists in the liquid phase.And the absorbent can be used for simultaneous desulfurization and denitrification.
作者
张家豪
陈红宇
钱智
ZHANG Jiahao;CHEN Hongyu;QIAN Zhi(College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2020年第1期8-13,共6页
Environmental Science & Technology
基金
中国科学院基础前沿科学研究计划“从0到1”原始创新项目(Y8540XX222)
关键词
活性氧簇
氧化
超重力机
脱硝
reactive oxygen species
oxidation
rotating packed bed
denitration
