【摘要】 基于高温管式炉实验系统在850～1 450℃、0～1.0%O₂体积分数范围内研究了CO对高温富燃料区NH₃脱硝特性的影响，并基于化学动力学分析揭示了CO对NH₃-NO反应特性的影响机制。结果表明：随着O₂浓度的降低，NH₃脱硝温度窗口向高温方向移动，可以突破传统选择性非催化还原温度窗口的限制，在1 100℃以上的高温窗仍能实现NO高效还原。无氧时，CO对NH₃-NO反应特性并无显著的影响；有氧时，CO氧化过程中促进了OH自由基的生成，使NH₃的最佳脱硝温度向低温方向移动约10～30℃,脱硝温度窗口略有变窄。同时由于CO促进了NH₂自由基的氧化，导致NO还原效率峰值降低约1.82%～4.90%。更多还原

【Abstract】 Based on the high-temperature tubular flow reactor system, the influence of CO on the denitration characteristics of NH₃ in the high-temperature fuel rich zone was studied within the range of 850-1 450 ℃ and 0%-1.0% O₂ volumetric concentration, and the impact mechanism of CO on the NH₃-NO reaction characteristics was revealed based on chemical kinetics analysis. The results show that with the decrease in O₂ concentration, the temperature window for NO reduction shifts toward higher zone, which can break the limitation of the traditional SNCR temperature, and can still achieve efficient NO reduction at temperatures above 1 100 ℃. In the absence of oxygen, CO has no significant effect on the NH₃-NO reaction characteristics. In the presence of oxygen, the oxidation process of CO promotes the generation of OH radicals, causing the optimal temperature for NO reduction to shift towards lower temperatures by about 10-30 ℃, and the denitration temperature window to be slightly narrower. Meanwhile, due to the promotion effect of CO on NH₂ radical oxidation, the peak of NO reduction efficiency decreases by about 1.82%-4.90%.更多还原