Limited Pd-doped Mn spinel catalysts for efficient reduction of NO in flue gases by hydrogen

作者：Li, Tingting; Xu, Chaochao; Cai, Xuanxuan; Sun, Wei; Cao, Limei; Yang, Ji^*

来源：Research on Chemical Intermediates, 2017, 43(12): 7147-7158.

DOI：10.1007/s11164-017-3064-7

• NOx
• Hydrogen
• SCR
• Flue gas
• Mn-based spinel

Limited Pd-doped Mn-based spinel catalysts were prepared for selective catalytic reduction by H-2 at low temperature. NiMn1.95Pd0.05O4 catalyst displayed maximum NO conversion of 96% at 150 A degrees C, representing high efficiency compared with non-palladium-doped manganate spinels. The order of activity was: NiMn1.95Pd0.05O4 > CuMn1.95Pd0.05O4 > CoMn1.95Pd0.05O4, consistent with their Brunauer-Emmett-Teller (BET) surface area, indicating that large surface area favored the reaction. X-ray diffraction (XRD) data proved that the catalysts had perfect spinel structure. When SO2 was added to the feed stream, the conversion of NO decreased due to competitive adsorption with NO and formation of sulfite and sulfate on the catalyst surface. The effect of 3 and 5% H2O was also tested, with the original conversion level of 95% being retained and the water vapor removed from the stream, representing excellent water tolerance.

• 出版日期2017-12
• 单位华东理工大学