摘要
为了解煤燃烧过程中NOx的生成机理,选用纯净杂环化合物吡啶作为煤中氮元素有机形态的模型化合物,对其热解及氧化规律进行实验研究.红外光谱仪分析结果表明:吡啶杂环在750℃时开始裂解;在850℃时腈类物质生成量最大;高温下含氮产物几乎全部以HCN的形式存在;N2O主要由腈类物质转化而成;从氧气的摩尔比等于6 0开始,随着氧气量的增加,N2O的生成量急剧增加.在缺氧状态下,高浓度CO造成的还原气氛使NOx生成受到很大程度的抑制.当温度高于850℃时,N2O向NO、NO2转化,当温度大于1000℃时,N2O全部转变为NO、NO2.NO、NO2主要由HCN裂解转化而成.
To investigate the rules of transformation during coal combustion, experiments were carried out for model compound pyridine and the results via Fourier transform infrared radiation analyzer show that the ring cleavage of pyridine occurs at 750°C, the quantity of nitriles is produced mostly at 850°C, and N2O is transformed from nitriles . Beginning from 6.0 of rO, the productivity of the N2O increases rapidly with the increase of the oxygen. In the state of oxygen deficit, the high condense CO makes the transformation of NOx more difficult. N2O transforms into NO and NO2 completely when the temperature is above 1000°C. NO and NO2 are mainly transformed from HCN.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2004年第3期251-253,257,共4页
Journal of Xi'an Jiaotong University
基金
国家"九七三"重点基础研究规划资助项目 (G1 9990 2 2 2 1 0 )
关键词
吡啶
热解
氧化
NOx
Fourier transform infrared spectroscopy
Nitrogen oxides
Oxygen
Pyrolysis
