NH_3选择性催化还原NO数学模型

Mathematic model of selective catalytic reduction of NO with NH_3 in experiment-scale reactor

针对小型反应器内装填的整体式V2O5-WO3-MoO3／TiO2催化剂上进行的NH3选择性还原NO的反应，建立了小型反应器内温度分布模型、浓度分布模型、催化剂用量的计算模型以及催化剂内部NO浓度的分布模型．应用所建模型，对反应器内的温度、浓度以及催化剂内的浓度分布进行了定量分析．结果表明，在不同进口温度下，反应器内温度沿反应器高度方向升高约30-50K；催化剂厚度存在最佳值，该最佳值应综合考虑NO转化率和催化剂磨损等条件而定．试验结果表明，模型计算得到的理论值和试验数据具有良好的一致性．

According to the selective catalytic reduction of NO with NH3 conducted in a mini type reactor with the integral type catalyst of V2O5-WO3-MoO3 supported on TiO2, a mathematical model was carried out and used to analyze quantitatively the temperature and concentration distributions in the reactor, as well as the distribution of NO concentration inside the catalyst. The results show a rise of about 30-50 K in temperature along the height of the reactor under different inlet temperatures. It is also found that there is an optimal value for the thickness of the catalyst. The analyzed results of the model agree well with the experimental data.