DeNOx properties of CeO2-MoO3/TiO2 type non-vanadium denitrification catalysts

DONG Changqing; ZHANG Hongcheng; LIN Zhuowei; LI Fangqian; LU Qiang; YANG Yongping

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DeNO_x properties of CeO₂-MoO₃/TiO₂ type non-vanadium denitrification catalysts

Thermal Power Generation Vol. 45, Issue 7, Pages: 37-43(2016)

更新时间：2025-09-28

- DeNO_x properties of CeO₂-MoO₃/TiO₂ type non-vanadium denitrification catalysts
- 作者机构：
  
  华北电力大学生物质发电成套设备国家工程实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： O643.36
- Published：2016
- 稿件说明：
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DONG Changqing, ZHANG Hongcheng, LIN Zhuowei, et al. DeNO_x properties of CeO₂-MoO₃/TiO₂ type non-vanadium denitrification catalysts[J]. Thermal Power Generation, 2016, 45(7): 37-43.
DOI：

DONG Changqing, ZHANG Hongcheng, LIN Zhuowei, et al. DeNO_x properties of CeO₂-MoO₃/TiO₂ type non-vanadium denitrification catalysts[J]. Thermal Power Generation, 2016, 45(7): 37-43. DOI：

摘要

以CeO_2为活性组分、MoO_3为助剂

制备了CeO_2-MoO_3/TiO_2型无钒脱硝催化剂。分析了不同活性组分、助剂、载体、制备方法和预处理方法对催化剂活性的影响

并与传统的以V2O_5为活性组分的V2O_5-WO_3/TiO_2型和V2O_5-MoO_3/TiO_2型催化剂进行比较。结果表明:以CeO_2为活性组分的无钒催化剂具有与传统钒基催化剂同样高效的脱硝性能;MoO_3助剂能有效提高催化剂的活性

且效果优于WO_3;相较于共沉淀法

采用等体积浸渍法制备的铈基催化剂具有更高的比表面积和脱硝活性;对催化剂进行硫酸浸渍预处理会抑制催化剂活性

而采用SO_2预处理则对脱硝活性有一定的提升

基于等体积浸渍法制备的5Ce-5Mo/TiO_2催化剂经SO_2硫化预处理后

在温度为350℃、空速75 000h-1的条件下脱硝效率可达89.15%。

Abstract

The CeO_2-MoO_3/TiO_2 type non-vanadium denitrification catalysts were prepared by taking CeO_2 as the active component and MoO_3 as the promoter.Experiments were performed to investigate the effects of the active component

promoter

carrier

preparation and pretreatment methods on activity of the CeO_2-MoO_3/TiO_2 catalysts.Moreover

the results were compared with that of the conventional V2O_5-WO_3/TiO_2 and V2O_5-MoO_3/TiO_2 catalysts which takes V2O_5 as the active component.The results indicated that

the CeO_2-based catalysts possessed the similar high denitrification efficiency as the conventional V2O_5-based catalysts.The promoter MoO_3 can enhance the catalyst activity

which was better than the WO_3.Compared with the catalysts prepared by the co-precipitation method

the ones prepared by the incipient wetness impregnation method had larger specific surface area and higher activity.Pretreating with sulfuric acid will decrease the activity of the catalysts

while pretreating with SO_2 could promote the catalysts' activity.The denitrification efficiency of 5Ce-5Mo/TiO_2 catalyst pretreated by SO_2 reached 89.15%at 350℃ with space velocity of 75 000h-1.

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