【摘要】 在小型流化床试验台上进行了焦炭的燃烧试验 ,研究焦炭颗粒和氧化钙对N2 O和NO的分解反应 ,焦炭颗粒对N2 O还原分解速率比NO快 ,氧化钙对N2 O分解有较强的催化作用 ,N2 O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焦炭颗粒对N2 O和NO形成的影响 ,脱挥发份的程度越高 ,焦炭氮形成N2 O的量越少 ,表明挥发份氮形成N2 O量高于相应焦炭氮燃烧产生的N2 O量 .焦炭燃烧过程中 ,NO形成比较均匀 ,而N2 O比较复杂 ,焦炭氮向NO的转化率随脱挥发份温度升高而增加 ,而向N2 O的转化率则有一临界脱挥发份温度点更多还原

【Abstract】 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.更多还原