摘要
NO的氧化过程是实现臭氧氧化同时脱硫脱硝技术的关键,在构建65步臭氧氧化NOx的详细化学反应机理的基础上,通过敏感度分析确定了NOx的主要氧化历程,并与机理试验结果进行了对比验证.结果表明NOx的氧化是逐级进行的,首先NO氧化生成NO2,当O3过量后生成NO3和少量N2O5.在n(O3)∶n(NO)<1的情况下主要产物为NO2,NO3、N2O5只有在O3过量条件下才会产生.在多层栓塞流反应器中进行的试验结果与模拟结果吻合良好,进一步验证了本反应机理的正确性.在机理分析与试验中均发现有N2O的生成,但其生成量很小,试验中发现均小于4×10-6.试验结果发现在100℃和200℃条件下,温度变化对于O3与NO之间的氧化反应影响很小,当n(O3)∶n(NO)=1.0时,分别达到了89.2%和85.0%的氧化效率.
The NO oxidization is the key step for simultaneously removing NO. and SO2 by ozone injection process. A detailed chemical reaction mechanism including 65 steps between ozone and NO. was developed. Sensitivity analysis was performed to determine the main reaction routes for NO oxidization. The kinetic simulation results were verified by experimental results in a precise plug flow reactor. NO was firstly oxidized into NO2 and then NO3, N2O5 step by step. NO2 is predominant product when n（O3 ） ： n（NO）less than 1. Compared to NO2, NO3 and N2O5 only appear when ozone is surplus, with the amounts of NO3 and N2O5 being relatively small. The kinetic simulation results fit well with the experimental results, which confirmed the correctness and accuracy of the mechanism. The formation of N2O was found both in mechanism analysis and experimental results, but the amounts of N2O were smaller than 4 × 10^-6 in all the tests. There was little difference in the reactions between ozone and NO at 100 ℃ and 200 ℃, because 89.2% and 85.0% of NO were separated at n（O3） ： n（NO）=1. 0 respectively.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第5期765-769,共5页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(50476059)
国家重点基础研究发展计划资助项目(2006CB200303)
国家杰出青年科学基金资助项目(50525620)
关键词
臭氧
NO
反应机理
敏感度分析
ozone
NO
reaction mechanism
sensitivity analysis
