Selective catalytic reduction of nitrogen oxides by methane over Ni/H-USY catalysts

ZHANG Hui; FANG Heliang; SHI Yao; LI Wei; TAN Tian’en; ZHENG Xiaoming

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Selective catalytic reduction of nitrogen oxides by methane over Ni/H-USY catalysts

更新时间：2026-03-26

- Selective catalytic reduction of nitrogen oxides by methane over Ni/H-USY catalysts
- CIESC Journal Vol. 57, Issue 2, (2006)
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- Online First：25 February 2006，
  
  Published：2006
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ZHANG Hui, FANG Heliang, SHI Yao, et al. Selective catalytic reduction of nitrogen oxides by methane over Ni/H-USY catalysts[J]. CIESC Journal, 2006, 57(2).
DOI：

ZHANG Hui, FANG Heliang, SHI Yao, et al. Selective catalytic reduction of nitrogen oxides by methane over Ni/H-USY catalysts[J]. CIESC Journal, 2006, 57(2). DOI：

摘要

考察了不同负载量的Ni/H-USY（ultra stable Y zeolite）催化剂在氧气含量5%情况下甲烷选择性催化还原氮氧化物性能，同时考察了添加微量Pd和Pt对15％(质量分数)Ni催化剂性能的影响.结果表明，催化剂的催化活性与活性组分的含量间存在密切关系，具有一个最佳的负载量.Pd、Pt的添加提高了氮氧化物的去除率，拓宽了反应活化温度的窗口，同时具有较强的抑制N2O生成的能力.此外采用XRD、TPR等技术对Ni/H-USY体系催化剂的物相结构及氧化还原性能进行了研究，初步探讨了催化剂的催化活性与活性中心的大小与分布之间的关系.

Abstract

Selective catalytic reduction(SCR) of NOx by CH4 over Ni/H-USY of different Ni loading and trace Pd and Pt elements used to improve the activity of a Ni/H-USY catalyst in the excess of 5% oxygen was investigated. Compared with Ni/H-USY

the Ni-Pd/H-USY and Ni-Pt/H-USY catalysts showed higher activity in a wide range of reactive temperature. A synergistic effect between Ni/H-USY and Pd element or Pt element enhanced the conversion of NOx. Samples of the catalysts were characterized with TPR

X-ray diffraction (XRD).The addition of Pd might be responsible for the higher activity because it can produce a highly dispersed active surface area as bound-state Ni species.

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