磁场应用于工业废气脱硫、脱硝和脱汞的研究进展  

Research status of magnetic field in flue gas desulfurization, denitrification and mercury removal

作　　者：王学谦[1] 冯萱 谢怡冰 王郎郎 宁平[1] WANG Xueqian;FENG Xuan;XIE Yibing;WANG Langlang;NING Ping(Faculty of Environmental Science And Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《环境工程学报》2020年第10期2604-2614,共11页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51868030,52070090);国家重点研发计划项目(2017YFC0210500,2018YFC0213400);云南省中青年学术带头人后备人才项目(2015HB012)。

摘　　要：随着磁场技术不断发展以及对其研究的深入,磁场已被越来越多应用于环境污染治理领域。总结磁场在废气脱硫脱硝和脱汞方面的研究进展,着重叙述和探讨了磁场对催化氧化二氧化硫、氮氧化物和汞这3种气体污染物的影响机制与去除机理。现有研究表明,外加磁场受顺磁逆磁材料、磁场种类、强度和气体组分的影响。一方面,磁场能够改善吸附剂传质性能、促进自由基和中间产物生成速率、控制自由基对的系间跃迁、抑制单重态自由基对的重结合、提高催化活性,而使有效反应温度降低;另一方面,磁化力增强了运输效应和化学吸附,且磁场与磁性催化剂具有协同作用,可造成局部磁场叠加,形成微小磁场源,从而促进顺磁性组分氧化,还可将逆磁性反应物转化为顺磁性产物,加速反应中的电子传递、增强反应物质在磁性位点的上活化,最终促进反应进行:磁场技术可为工业废气中气体污染物的去除提供新思路。With the continuous development of magnetic field technology and the deepening of its research,magnetic field has been more and more applied in the field of environmental pollution control.In this paper,it summarizes the research progress of magnetic field in gas desulfurization,denitrification and mercury removal,especially the properties of magnetic field affects the removal mechanism of sulfur dioxide,nitrogen oxide and mercury.Affected by paramagnetic and diamagnetic materials,magnetic field types,intensities and gas components,the results show that the applied magnetic field can improve the mass transfer performance of adsorbent,promote the formation rate of free radicals and intermediates,control the transition between free radicals,inhibit the recombination of singlet free radicals,improve the catalytic activity,and reduce the effective reaction temperature.Magnetizing force on the other hand enhances transport effect and chemical adsorption,thereby the magnetic field and magnetic catalysts have synergy,it can cause local magnetic field superposition and form small magnetic field source.Not only promote the oxidation of paramagnetic component,but also convert diamagnetism reactant to paramagnetic products,accelerate the electron transfer reactions,enhance reaction material on the site of magnetic activated,thus promote the reaction.The magnetic field technique introduced in this paper provides a new idea for the removal of gaseous pollutants from industrial waste gas.

关 键 词：磁场 脱硫 脱硝 脱汞 催化 反应机理 

分 类 号：X511[环境科学与工程—环境工程]