乙醇胺对介质阻挡耦合电晕放电同时脱除NO、SO2的影响  

Effect of ethanolamine on the simultaneous removal of NO and SO2 by dielectric barrier coupled corona discharge

作　　者：刘露 骆嘉钦 阚青 马晓迅[1] LIU Lu;LUO Jiaqin;KAN Qing;MA Xiaoxun(School of Chemical Engineering,Northwest University,International Scientific and Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources,Chemical Engineering Research Center of the Ministry of Education for Advance Use Technology of Shanbei Energy,Shaanxi Research Center of Engineering Technology for Clean Coal Conversion,Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi,Xi’an 710069,Shaanxi,China)

机构地区：[1]西北大学化工学院,国家碳氢资源清洁利用国际科技合作基地,陕北能源先进化工利用技术教育部工程研究中心,陕西省洁净煤转化工程技术研究中心,陕北能源化工产业发展协同创新中心,陕西西安710069

出　　处：《化工进展》2020年第11期4685-4692,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21536009);陕西省科技计划(2017ZDCXL-GY-10-03)。

摘　　要：采用自行设计的介质阻挡耦合电晕放电等离子体反应装置进行了模拟烟气同时脱硫脱硝的研究,分别考察乙醇胺(HOCH2CH2NH2,MEA)在不同模拟烟气体系中对NO、SO2脱除的影响,深入探讨了MEA在放电过程中与NO的作用机理。结果表明:在N2/O2/SO2/NO体系中,0.56%MEA的加入可以显著消除O2对NO脱除的抑制作用;在N2/CO2/SO2/NO体系中,MEA会吸收进入体系中的部分CO2,以减弱CO2对NO脱除的抑制;在N2/O2/CO2/H2O/NO/SO2体系中,0.56%MEA的加入既可以有效减弱H2O的影响,也可以使NO的脱除率达到71.28%,继续将MEA的体积分数增大至1.20%时,可将该体系下NO脱除率提高到81.25%;同时,MEA可以在短时间内高效吸收体系内的SO2,且几乎不受其他气体成分的影响,SO2脱除率保持在95%左右。The self-designed dielectric barrier coupled corona discharge plasma reactor was used to study the simultaneous desulfurization and denitrification of simulated flue gas.The effects of ethanolamine on the removal of NO and SO2 in different simulated flue gas systems were investigated,and the interaction mechanism between ethanolamine and NO in the discharge process was discussed.The results showed that the addition of 0.56%ethanolamine into the N2/O2/SO2/NO system can significantly eliminate the inhibition effect of O2 on the removal of NO while in the N2/CO2/SO2/NO system,ethanolamine would absorb part of CO2 and hence weaken the inhibition effect of CO2 on the NO removal.As for the N2/O2/CO2/H2O/NO/SO2 system,the addition of 0.56%ethanolamine can not only effectively reduce the influence of H2O,but also prompt the removal rate to 71.28%.When the volume fraction of ethanolamine was increased to 1.20%,the NO removal rate increased to 81.25%.At the same time,ethanolamine can effectively absorb the SO2 in the system in a short time,which was almost unaffected by other gas components with a SO2 removal rate of 95%.

关 键 词：介质阻挡-电晕放电 脱硫脱硝 乙醇胺(MEA) 吸收 脱除率 

分 类 号：X511[环境科学与工程—环境工程]