催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (4): 666-671.DOI: 10.3724/SP.J.1088.2011.01127

• 研究论文 • 上一篇    下一篇

TiO2 纳米管阵列负载MnOx 复合催化剂的脱硝性能

赵崇斌, 杨杭生, 周环, 邱发敏, 张孝彬   

  1. 浙江大学材料科学与工程学系, 硅国家重点实验室, 浙江杭州310027
  • 收稿日期:2010-11-23 修回日期:2011-02-07 出版日期:2011-04-18 发布日期:2014-08-30

Catalytic Reduction of NOx over MnOx Coated TiO2 Nanotube Arrays

ZHAO Chongbin, YANG Hangsheng*, ZHOU Huan, QIU Famin, ZHANG Xiaobin   

  1. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2010-11-23 Revised:2011-02-07 Online:2011-04-18 Published:2014-08-30

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摘要： 研究了 TiO2 纳米管阵列负载的 MnOx 复合物选择性催化还原 NOx 的性能. 结果显示, 在 150~250 oC 下该催化剂脱除 NOx 的效率达 90% 以上 (200 oC 下为 99% 以上), 表现出优异的中低温脱硝性能. 当反应温度更高时, 有可能使反应进入努森扩散控制状态, 从而在一定程度上抑制了催化反应的进行.

关键词: 锰氧化物, 二氧化钛纳米管阵列, 氮氧化物, 选择性催化还原

Abstract: Catalytic reduction of NOx with NH3 was studied over MnOx coated TiO2 nanotube arrays prepared by anodic oxidation. When the MnOx was deposited inside the TiO2 nanotubes, the good NOx removal efficiency was achieved under relatively low reaction temperature, such that NOx removal efficiency of over 90% was always obtained at 150–250 °C, particularly at 200 °C, it reached 99.9%. However, when the reaction temperature was higher than 250 °C, a suppression of NOx removal was observed. This is probably because that the diffusion of NO molecules into TiO2 nanotubes was controlled by Knudson diffusion.

Key words: manganese oxide, titanium dioxide nanotube array, nitrogen oxide, selective catalytic reduction