中文摘要：

在一管式石英反应器上采用实验结合模拟的方式详细研究添加H2对选择性非催化还原（selective non-catalytic reduction，SNCR）过程中NOx、N2O、NH3排放以及N2转化率的影响，实验采用氨水作为还原介质。随着H2添加量的增加，实验与模拟结果均表明：脱硝温度窗口、最佳脱硝温度持续向低温方向移动，最佳脱硝效率有所降低，而脱硝温度窗口宽度则呈现出先增大后减小的趋势；N2O生成峰值逐渐升高，其生成的温度窗口主要向低温侧扩展，同时，NH3泄漏曲线也向低温方向偏移；扣除N2O影响的N2转化率最大值将低于对应的最佳脱硝效率，但达到最大N2转化率时的温度将比相应的最佳脱硝温度要略高。通过CHEMKIN软件对添加H2后的脱硝反应机制进行了分析，认为反应H2＋OH=H＋H2O的加强是引起脱硝特性改变的起始原因；H的大量存在间接促使了NO2作为中间产物的生成，而NO2对于脱硝效率的提高以及N2O排放的控制都是不利的。

英文摘要：

Experimental and modeling study on the influence of H2 addition on selective non-catalytic reduction （SNCR） using ammonia solution was carried out in a quartz tube reactor. The experimental results and simulated data both show that when the addition amount of H2 increased： The DeNO. temperature window and the optimal DeNOx temperature both shifted towards a lower temperature, the optimal DeNOx efficiency would be decreased and the width of DeNO. temperature window would be widened firstly and reduced later; the production peak of N2O would be higher, it＇s production temperature window prolongated towards a lower temperature mainly, and the slip curves of NH3 also shifted to a lower temperature simultaneously; the largest N2 conversion efficiency after deducting N2O would be somewhat lower than the optimal DeNOx efficiency, but the temperature when the largest N2 conversion efficiency reached was higher than the optimal DeNOx temperature. The mechanism analysis through CHEMKIN implied that it was the reaction H2 ＋ OH = H ＋ H2O that firstly led to the changes happened in the course of SNCR, and the increment of hydrogen atom would result in the production of NO2 as an intermedial species, which was disadvantaged to the DeNOx efficiency and the control of N2O emission.