大气压介质阻挡放电及协同催化剂脱硝研究进展

受绿色生态和可持续发展战略理念的驱动，废气排放对环境造成的危害备受关注。NO _x 作为废气的主要污染物之一，是废气污染物控制的重点与难点。基于此，本文介绍了传统后处理脱硝技术的优缺点及应用现状,回顾了介质阻挡放电（DBD）基础研究，分析了DBD脱硝性能，重点阐述了DBD协同催化剂脱硝及脱硝机理。分析指出：①DBD驱动电源与反应器结构是制约脱硝性能的关键因素；②单独DBD技术脱硝性能较差，而DBD协同催化填充床技术展现出优异的脱硝性能和较高的N₂选择性；③等离子体协同催化脱硝机理研究主要包括等离子体特征参数诊断、流体模型验证、等离子体传播机制分析以及原位表征，而在等离子体催化理论计算方面的研究较为缺乏。因此，未来DBD协同催化脱硝技术应立足如下几个方面发展：研发高功率、低能耗电源，提升废气NO _x 处理量；优化反应器结构，提升脱硝的效率与选择性；设计与构筑适宜于DBD环境的脱硝催化剂；深入全面分析DBD协同催化剂脱硝机理。

Research progress of NO x removal by combination of atmospheric pressure dielectric barrier discharge and catalysis

Driven by the concept of green ecology and sustainable development strategy, exhaust emissions to the environment has attracted much attention. As one of the main pollutants of exhaust gas, NO _x is the focus and difficulty of exhaust gas pollutant control. The advantages, disadvantages and application status of traditional post-treatment de-NO _x technologies are introduced. The basic researches of dielectric barrier discharge are reviewed. The synergistic de-NO _x performance and mechanism by DBD and catalyst are analyzed. It is pointed out that:①the DBD power supply and the reactor structure are the key factors restricting the de-NO _x performance; ②the de-NO _x performance of DBD only is not satisfactory, but the combination of DBD with catalytic packed bed exhibits excellent de-NO _x efficiency and high N₂ selectivity; ③the researches on de-NO _x mechanism of plasma-assisted catalyst mainly include plasma characteristic parameter diagnosis, fluid model verification, plasma propagation mechanism analysis and in-situ characterization. However, the research on the theoretical calculation of plasma catalysis is limited. Therefore, we propose that the future development of DBD de-NO _x technology should be based on ①the high-power and high-efficiency power supply to improve the NO _x treatment capacity; ②the reactor structure optimization to improve the de-NO _x efficiency and N₂ selectivity; ③suitable design and construct of the de-NO _x catalyst for DBD environment; ④the comprehensive analysis of the de-NO _x mechanism of DBD synergistic catalyst.