流化床内焦炭对N2O和NO生成和分解的影响

在小型流化床试验上进行了焦炭的燃烧试验，研究焦炭颗粒和氧化钙对Ｎ２Ｏ和ＮＯ的分解反应，焦炭颗粒对Ｎ２Ｏ还原分解速率比ＮＯ快，氧化钙对Ｎ２Ｏ分解有较强的催化作用，Ｎ２Ｏ和ＮＯ的分解反应过程可用一级Ａｒｒｈｅｎｉｕｓ公式来描述，研究不同程度脱去挥发份的炭焦颗粒对Ｎ２Ｏ和ＮＯ形成的影响，脱挥发份的程度越高，焦炭氮形成Ｎ２Ｏ的量越少，表明挥发份氮形成Ｎ２Ｏ量高于相应焦炭氮燃烧产生的Ｎ２Ｏ量，焦炭燃烧过程中

Effect of char on N2O and NO emissions in fluidized bed combustion

In order to investigate the effect of char on N 2O and NO emissions in fluidized bed combustion, the char prepared at various devolatilization temperatures is burnt. N 2O emission is strongly dependent on the devolatilization temperature. The char devolatilized at higher temperature shows the lower N 2O formation. The fuel\|N conversion ratio to N 2O is increasing with increase in burning temperature, while the one to NO is decreasing. The results show that there is an optimum range of devolatilizing temperature that gives a maximum conversion to N 2O. Reduction activities of char on N 2O and NO are measured. N 2O reduction rate is always faster than that of NO for char particles. CaO shows higher N 2O and NO reduction activity. Both N 2O and NO reduction rates can be expressed as one order Arrhenius form.