催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (1): 68-71.

• 研究论文 • 上一篇    下一篇

Fe 含量对 FeAlPO-5 催化剂上甲烷还原 N2O 反应的影响

赵晓旭, 程党国, 陈丰秋, 詹晓力   

  1. 浙江大学化学工程与生物工程学系, 浙江杭州 310027
  • 收稿日期:2010-01-25 出版日期:2010-01-25 发布日期:2010-01-25

Influence of Fe Content on Catalytic Reduction of N2O with CH4 over FeAlPO-5 Catalyst

ZHAO Xiaoxu, CHENG Dang-guo*, CHEN Fengqiu, ZHAN Xiaoli   

  1. Department of Chemical and biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2010-01-25 Online:2010-01-25 Published:2010-01-25

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摘要： 采用水热法制备了一系列不同 Fe 含量的 FeAlPO-5 催化剂, 并将其用于 CH4 催化还原 N2O 反应. 结果表明, FeAlPO-5 催化剂在此反应中表现出较高的低温活性. N2 吸附、X 射线衍射和紫外可见光谱等表征结果表明, 水热法制备的 FeAlPO-5 催化剂具有典型的 AlPO-5 分子筛结构. Fe 含量对催化剂的活性及催化剂中 Fe 物种的分布有较大影响, 当 w(Fe) = 2.4% 时, 催化剂除含有可促使 CH4 低温还原 N2O 反应的孤立态的 Fe 物种和低聚态的 Fe 物种外, 还含有相当数量的可使 N2O 直接催化分解的纳米态的 Fe 物种.

关键词: 铁, AlPO-5 分子筛, 甲烷, 催化还原, 氧化亚氮

Abstract: Fe-substituted AlPO-5 zeolite (FeAlPO-5 catalyst) samples with different Fe contents were prepared by the hydrothermal method and used in catalytic reduction of N2O with CH4, exhibiting good low-temperature activity. The AlPO-5 and FeAlPO-5 samples were characterized by N2 physisorption, X-ray diffraction, and UV-visible spectroscopy. The results showed that the FeAlPO-5 samples had the typical structure as that of AlPO-5 zeolite. The Fe content had strong influence on the catalyst activity and the distribution of Fe species. The 2.4% FeAlPO-5 catalyst contained not only isolated FeIII and oligonuclear FeIII, being active for catalytic reduction of N2O with CH4, but also a considerable nanosized FeIII, being responsible for N2O decomposition.

Key words: iron, AlPO-5 zeolite, methane, catalytic reduction, nitrous oxide