SCR 反应物理化学过程模型及验证

摘要

Based on SCR DeNO x technology of diesel engine ,a zero‐dimension mathematic model of SCR reactor was built and the calculation software was compiled with VC + + software .The catalyst conversion performances of vanadium‐based cat‐alyst under different temperatures ,space velocities ,oxygen contents ,NO2 /NO x molar ratios and NH3 /NO x ratios were in‐vestigated and compared with the calculated results .The results show that the calculated results agree well with the experimen‐tal results .At low temperature , smaller space velocity and larger NO2 /NO x molar ratio will lead to higher conversion efficiency of NO x .%针对柴油机选择性催化还原（SCR）脱硝技术，建立了零维 SCR 反应器数学模型，并利用 VC ＋＋编写了仿真计算软件。通过小样台架试验测试了钒基催化剂在不同温度、空速、含氧量、NO2与 NO x 的摩尔比以及氨氮比条件下的 NO x 转化率，并与计算结果进行对比。结果表明，模型计算值与试验结果具有很好的一致性，低温条件下，空速越低，NO2与 NO x 的摩尔比越大，NO x 的转化率越高。