| 用CuO/A12O3/堇青石催化剂选择性催化还原脱硝的实验和动力学研究 |
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| 引用本文： | 雷志刚,龙爱斌,贾美如,刘学义.用CuO/A12O3/堇青石催化剂选择性催化还原脱硝的实验和动力学研究[J].中国化学工程学报,2010,18(5):721-729. |
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| 作者姓名： | 雷志刚 龙爱斌 贾美如 刘学义 |
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| 作者单位： | State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (20821004, 20736001, 21076008);the Research Fund for the Doctoral Program of Higher Education of China (2090010110002) |
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| 摘 要： | 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 of 94.01 kJ•mol1 and the corresponding pre-exponential factor of 3.39×108 cm3•g1•s1 when NH3 is excessive. However, when NH3 is not enough, an Eley-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 ΔHads 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 reactor design and engineering scale-up.
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| 关 键 词： | kinetics selective catalytic reduction CuO/γ-Al2O3/cordierite catalyst monolithic honeycomb reactor mathematical model |
| 收稿时间： | 2010-2-22 |
| 修稿时间： | 2010-2-22
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Experimental and Kinetic Study of Selective Catalytic Reduction of NO with NH3 over CuO/Al2O3/Cordierite Catalyst |
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| LEI Zhigang,LONG Aibin,JIA Meiru,LIU Xueyi.Experimental and Kinetic Study of Selective Catalytic Reduction of NO with NH3 over CuO/Al2O3/Cordierite Catalyst[J].Chinese Journal of Chemical Engineering,2010,18(5):721-729. |
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| Authors: | LEI Zhigang LONG Aibin JIA Meiru LIU Xueyi |
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| Affiliation: | State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | 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 Ea' of 94.01 kJ·mol-1 and the corresponding pre-exponential factor A' of 3.39×108 cm3·g-1·s-1 when NH3 is excessive. However, when NH3 is not enough, an Eley-Rideal kinetic model based on experimental data is derived with Ea of 105.79 kJ·mol-1, the corresponding A of 2.94×109cm3·g-1·s-1, heat of adsorption ΔHads 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 reactor design and engineering scale-up. |
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| Keywords: | kinetics selective catalytic reduction CuO/γ-Al2O3/cordierite catalyst monolithic honeycomb reactor mathematical model |
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