Microwave Irradiation Coupled with Physically Mixed MeOx (Me=Mn, Ni) and Cu-ZSM-5 Catalysts for the Direct Decomposition of Nitric Oxide under Excess Oxygen

作者：Xu, Wentao; Zhou, Jicheng^*; You, Zhimin; Luo, Yushang; Ou, Yingpiao

来源：ChemCatChem, 2015, 7(3): 450-458.

DOI：10.1002/cctc.201402852

• copper
• manganese
• microwave chemistry
• nickel
• zeolites

The direct catalytic decomposition of NO into N-2 and O-2 with high activity and N-2 selectivity at low temperature under excess oxygen is a challenge. Herein, we report a new approach for the direct decomposition of NO into N-2 and O-2 by microwave catalysis over MeOx-Cu-ZSM-5 (Me=Mn, Ni) under excess oxygen. We observed that the microwave direct catalytic decomposition of NO over MeOx-Cu-ZSM-5 under excess oxygen is highly efficient, and the NO conversions are 94.3% over MnO2-Cu-ZSM-5 at 300 degrees C and 92.3% over Ni2O3-Cu-ZSM-5 at 350 degrees C. Meanwhile, the N-2 selectivity remains more than 98%. Importantly, the apparent activation energies of MnO2-Cu-ZSM-5 and Ni2O3-Cu-ZSM-5 are as low as 15.5 and 25.7kJmol(-1), which suggests a significant microwave catalytic effect. Furthermore, microwave irradiation exhibits a microwave selective effect. The oxygen concentration has almost no influence on the activity of catalytic decomposition of NO over MeOx-Cu-ZSM-5 under microwave irradiation.

• 出版日期2015-2
• 单位湘潭大学