STUDY ON LOW-TEMPERATURE NH<sub>3</sub> SELECTIVE REDUCTION OF NO<sub>x</sub> BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE

WU Bijun1; ZHU Wenbin1; MA Jin1; XU Chao2; JIANG Cunwu2; Lü Jing21.Guodian Environment Protecting Institute

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STUDY ON LOW-TEMPERATURE NH₃ SELECTIVE REDUCTION OF NO_x BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE

Thermal Power Generation Vol. 39, Issue 12, Pages: 23-28(2010)

更新时间：2025-09-28

- STUDY ON LOW-TEMPERATURE NH₃ SELECTIVE REDUCTION OF NO_x BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE
- 作者机构：
  
  1. 国电环境保护研究院
  2. 国电蚌埠发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2010
- 稿件说明：
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WU Bijun1, ZHU Wenbin1, MA Jin1, et al. STUDY ON LOW-TEMPERATURE NH₃ SELECTIVE REDUCTION OF NO_x BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE[J]. Thermal Power Generation, 2010, 39(12): 23-28.
DOI：

WU Bijun1, ZHU Wenbin1, MA Jin1, et al. STUDY ON LOW-TEMPERATURE NH₃ SELECTIVE REDUCTION OF NO_x BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE[J]. Thermal Power Generation, 2010, 39(12): 23-28. DOI：

摘要

在二氧化钛负载的锰氧化物(MnOx/TiO2)中引入第2种组分

制成二元过渡金属氧化物(MnOx-A/TiO2)催化剂

A分别为三氧化二铁(Fe2O3)、三氧化钨(WO3)、三氧化钼(MoO3)、三氧化二铬(Cr2O3)

试验研究其低温催化活性、N2选择性及抗SO2毒性。结果表明

低温活性:Mn-W/Ti O2Mn-Fe/Ti O2Mn-Cr/TiO2Mn-Mo/TiO2;N2选择性:Mn-Fe/Ti O2Mn-W/TiO2Mn-Mo/TiO2Mn-Cr/Ti O2

Mn-Fe/TiO2和Mn-W/TiO2保持了较高低温活性的同时提高了N2选择性;当反应气体中含有0.01%SO2和6%H2O

空速为12 600 h-1、120℃、8 h后Mn-W/TiO2、Mn-Fe/TiO2、Mn-Mo/TiO2的NOx转化率分别保持在98.5%、95.8%及94.2%。由此得出

WO3、Fe2O3为MnOx有效的助催化剂

可大大提高MnOx/TiO2的选择性和抗SO2毒性的能力。傅里叶变换红外光谱显示

与Fe2O3不同

WO3也提供了部分Lewis酸活性点

在有低浓度SO2存在下Mn-W/TiO2显示了极好的低温NH3选择性还原NOx的催化活性。

Abstract

Introducing secondary component into magnesium oxide borne the titanium dioxide(MnOx/TiO2)

a catalyst of two-element metal oxide(MnOx-A/TiO2) has been made

here

A is Fe2O3

WO3

and Cr2O3 respectively

their low temperature catalytic activity

selectivity of N2

and SO2-resistant behavior being tested and studied.Results show that the sequence of thier low temperatureactivity is as follows:Mn-W/TiO2Mn-Fe/TiO2Mn-Cr/TiO2Mn-Mo/TiO2;the sequence in selectivity of N2 is:Mn-Fe/TiO2Mn-W/TiO2Mn-Mo/TiO2Mn-Cr/TiO2;at the time of keeping low temperature activity

Mn-Fe/TiO2 and Mn-W/TiO2 can enhance the selectivity of N2.In the case of SO2 and H2O content in the reaction gas being 0.01% and 6% respectively

after 8 h as the speed and temperature of air

becoming 12600 h-1 and 120 ℃

the conversion rate of NOx by using Mn-W/TiO2

Mn-Fe/TiO2 and Mn-Mo/TiO2 is kept at 98.5%

95.8%

and 94.2% respectively.Therefore

it is clear that the WO3 and Fe2O3 are effective catalyst aids for MnOx

they can greatly enhance the selectivity and SO2-resistant ability of MnOx/TiO2.Infrared spectrum of Fourier transfom shows that the WO3 is different from the Fe2O3

being able also to provide partial Lewis acid active points

under existence of low concentration SO2

the Mn-W/TiO2 has very good catalystic activity of low temperature NH3 selective reduction for NOx.

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STUDY ON LOW-TEMPERATURE NH3 SELECTIVE REDUCTION OF NOx BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE

DOI：

摘要

Abstract

关键词

Keywords

references

STUDY ON LOW-TEMPERATURE NH₃ SELECTIVE REDUCTION OF NO_x BY USING TITANIUM DIOXIDE BORNE TWO-ELEMENT INTERIM METAL OXIDE