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›› 2009, Vol. 9 ›› Issue (6): 1192-1197.

• 材料工程专栏 • 上一篇    下一篇

Mn-Fe-Ce/TiO2低温NH3选择性催化还原NO

郭凤 余剑 朱剑虹 刘云义 许光文   

  1. 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所 多相复杂系统国家重点实验室 中国科学院过程工程研究所 多相复杂系统国家重点实验室 沈阳化工学院化学工程学院 中国科学院过程工程研究所多相复杂系统国家重点实验室
  • 收稿日期:2009-07-15 修回日期:2009-08-28 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 郭凤

Low-temperature Selective Catalytic Reduction of NO with NH3 over Mn-Fe-Ce/TiO2

GUO Feng YU Jian ZHU Jian-hong LIU Yun-yi XU Guang-wen   

  1. National Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences School of Chemical Engineering, Shenyang Institute of Chemical Technology State Key Laboratory of Multi-Phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2009-07-15 Revised:2009-08-28 Online:2009-12-20 Published:2009-12-20
  • Contact: GUO Feng

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摘要： 采用浸渍法制备了MnO2-Fe2O3-CeO2/TiO2催化剂用于低温NH3选择性催化还原烟气中NO，考察了Mn, Fe, Ce含量及焙烧温度对NH3选择性催化还原NO的活性和抗水性能的影响. 在气体体积空速(GHSV)=24000 h-1, NH3/NO=0.8(j), 350℃煅烧和烟气含3%(j) O2的条件下，该系列催化剂的脱硝活性为MnO2-Fe2O3-CeO2/TiO2>MnO2- Fe2O3/TiO2>MnO2/TiO2，且在200℃时MnO2(10)-Fe2O3(5)-CeO2(5)/TiO2的脱硝率为95%. 对含10%(j)水蒸汽的烟气，MnO2(10)-Fe2O3(5)-CeO2(5)/TiO2的脱硝活性维持在87%；在10%(j)水蒸汽和100′10-6 SO2共存条件下，短时间内脱硝活性维持在55%.

关键词: 选择性催化还原, 低温脱硝, 催化剂

Abstract: Manganese-iron-cerium-titania oxide (MnO2-Fe2O3-CeO2/TiO2) catalysts were prepared with impregnation method and tested for selective catalytic reduction of NO with ammonia at about 200℃. The catalysts were characterized by XRD, FT-IR, TGA and FE-SEM. The denitration activity and inhibition effect of steam were studied at varied contents of Mn, Fe, Ce and calcination temperatures. The results demonstrated that their low temperature activity was subject to an order of MnO2-Fe2O3-CeO2/TiO2> MnO2-Fe2O3/TiO2>MnO2/TiO2. The achieved best performance was over a catalyst of MnO2(10)-Fe2O3(5)-CeO2(5)/TiO2 calcined at 350℃. The realized NO conversion rate was over 95% at 200℃ at GHSV=24000 h-1, NH3/NO=0.8(j) and with 3%(j) O2. NO conversion rate was reduced to 87% with 10%(j) steam in the flue gas and to 55% when 100′10-6 SO2 was further included into the gas.

Key words: selective catalytic reduction, low temperature denitration, catalys

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