煤燃烧过程中NOx的生成和还原

燃煤过程中ＮＯｘ 的排放是一个复杂的过程， 既包括ＮＯｘ 的生成过程又包括生成的ＮＯｘ 进行均相和多相还原反应． 简述了煤燃烧过程中ＮＯｘ 生成和还原的机理． 认为燃料氮是ＮＯｘ的主要来源，ＮＯｘ 的排放与煤阶、煤中氮含量以及温度等因素有关；ＮＯｘ 与半焦的多相反应是ＮＯｘ还原的主要原因， 其中包括ＮＯｘ 在半焦表面的化学吸附、表面络合物的生成以及产物的生成和脱附等过程

THE FORMATION AND REDUCTION OF NOx DURING COAL COMBUSTION

The emission of NO x during coal combustion is a very complex process, inclu ding the formation of NO x and the formed NO x undergoes homogeneous gas phase reduction and heterogeneous gas solid reduction. This paper reviewed the formation and reduction mechenisms of NO x . Fuel N is the main source of NO x . The emission of NO x depends on many factors, such as the rank of coal, the content of nitrogen, the structure of char and combustion temperature. The NO x char heterogeneous reaction is the most significant reaction of NO x reduction which includes chemisorption of NO x on the char surface, the formation of surface complexes and the release of products.