在在 673 K 是由硫二氧化物(SO2 ) 的 sulfated 以后, CuO/-Al2O3/cordierite 催化剂为氮氧化物的选择催化减小(SCR ) 展出高活动(没有) 与在 573-723 K 的氨(NH3 ) 。SCR 的内在的动力学不,与在 CuO/-Al2O3/cordierite 上的 NH3,催化剂当内部、外部的散开不在时在一个改正床反应堆被测量了。试验性的结果证明反应率能被一阶的表情与 94.01 kJ 的激活精力 Ea 确定吗?
The CuO/γ-Al2O3/cordierite catalyst, after being sulfated by sulfur dioxide (SO2) at 673 K, exhibits high activities for selective catalytic reduction (SCR) of nitrogen oxide (NO) with ammonia (NH3) at 573-723 K. The intrinsic kinetics of SCR of NO with NH3 over CuO/γ-Al2O3/cordierite catalyst has been measured in a fixed-bed reactor in the absence of internal and external diffusions. The experimental results show that the reaction rate can be quantified by a first-order expression with activation energy Eá of 94.01 kJ·mol-1 and the corresponding p re-exponential factor A′ of 3.39×108 cm3·g-1·s-1 when NH3 is excessive. However, when NH3 is not enough, an E ley-Rideal kinetic model based on experimental data is derived with Ea of 105.79 kJ·mol-1, the corresponding A of 2 .94×109 cm3·g-1·s-1, heat of adsorption-Hads of 87.90 kJ·mol-1 and the corresponding Aads of 9.24 cm3·mol-1. The intrinsic kinetic model obtained was incorporated in a 3D mathematical model of monolithic reactor, and the agreement of the prediction with experimental data indicates that the present kinetic model is adequate for the reac-tor design and engineering scale-up.