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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.
The CuO / γ-Al 2 O 3 / cordierite catalyst, after being sulfated by sulfur dioxide (SO 2) at 673 K, exhibits high activity for selective catalytic reduction (SCR) of nitrogen oxide (NO) with ammonia (NH 3) 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 Ea of 94.01 kJ · mol -1 and the corresponding p re-exponential factor A ’of 3.39 × 108 cm 3 · g -1 s -1 when NH 3 is excessive. However, when NH 3 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 cm 3 · 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.