高温无催化剂条件下CO还原NO数值模拟研究  

Numerical Simulation Research of the Reduction of NO by CO at High Temperature without Catalyst

作　　者：阮丹[1] 齐砚勇[1,2] 李会东[1] 

机构地区：[1]西南科技大学材料科学与工程学院,绵阳621010 [2]中国建筑材料科学研究总院,绿色建筑材料国家重点实验室,北京100024

出　　处：《硅酸盐通报》2016年第6期1674-1681,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家科技支撑计划(2011BAA04B04)

摘　　要：随着对NOx排放标准要求越来越高,煤粉燃烧生成的NOx中NO所占比例约90%,对NO的还原研究是一项重要的课题。本文利用CHEMKIN软件的PSR模块对CO还原NO的过程进行了模拟,并对其热力学与动力学分析。结果表明:在无催化剂条件下,CO还原NO所需温度约为1650 K,压力对于反应转化率及反应路径影响不大,但对于反应速率有明显影响;反应路径分析发现,NCO自由基及N2O自由基受温度影响大,增加温度利于该两自由基生成,促进反应进行。在高温条件下,NO的还原反应不仅为CO+NO→CO_2+0.5N2还伴随2NO幑幐O2+N2反应的进行。With the demands of NOxemission standard is getting higher and higher,the proportion of NO in NOxthat are formed from pulverized coal combustion is about 90%,so it is a significant subject to the reduction of NO.The reduction of NO by CO was researched by PSR of CHEMKIN software.Thermodynamics and Kinetics of the reduction of NO by CO were mainly analysis.The results show that the temperature of the reduction of NO by CO is about 1650 K with the condition of no catalyst.And the pressure has no significant influence on reaction transformation and reaction path,but it has significant influence on reaction rate.By reaction path analysis,it indicated that temperature had more obvious effect on NCO radical and N2 O radical.The increase of temperature could promote the form of NCO radical and N2 O radical.The reduction reaction of NO is not only for CO ＋ NO→ CO_2＋ 0.5N2,but also associated with 2NO O2＋ N2 reaction.

关 键 词：NO 还原 数值模拟 反应机理 

分 类 号：TQ171[化学工程—玻璃工业]