STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO<sub>x</sub> WITH NH<sub>3</sub> UNDER LOW TEMPERATURE

WU Bi-jun; ZHU Lin; CAO Lin-yanGuodian Environmental Protection Research Institute

doi:10.19666/j.rlfd.2008.11.012

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STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO_x WITH NH₃ UNDER LOW TEMPERATURE

Thermal Power Generation Issue 11, Pages: 49-54(2008)

更新时间：2025-09-28

- STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO_x WITH NH₃ UNDER LOW TEMPERATURE
- 作者机构：
  
  国电环境保护研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.11.012
  CLC： X701
- Published：2008
- 稿件说明：
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WU Bi-jun, ZHU Lin, CAO Lin-yanGuodian Environmental Protection Research Institute. STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO_x WITH NH₃ UNDER LOW TEMPERATURE[J]. Thermal Power Generation, 2008, (11): 49-54.
DOI：

WU Bi-jun, ZHU Lin, CAO Lin-yanGuodian Environmental Protection Research Institute. STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO_x WITH NH₃ UNDER LOW TEMPERATURE[J]. Thermal Power Generation, 2008, (11): 49-54. DOI： 10.19666/j.rlfd.2008.11.012.

摘要

制备了一种新型催化剂

其由二氧化钛负载锰氧化物(MnOx/TiO2)组成。对不同负载量与不同焙烧温度的MnOx/TiO2进行了低温NH3选择性催化还原NOx的试验研究

结果表明

NOx的转化率随负载量增加而提高

而N2选择性则相反

焙烧温度同时影响催化活性和N2选择性。借助X射线衍射(XRD)、比表面积(BET)、孔容、孔径、傅立叶变换红外光谱(FT-IR)、程序升温还原(TPR)及NH3程序升温脱附(NH3-TPD)等测试手段

寻求最佳的MnOx/TiO2制备条件。结果显示

在相同负载量(以Mn计)下

MnO2的活性及选择性高于MnO2与Mn2O3的混合物;在空速(GHSV)12 600 h-1、80℃时NOx转化率达97%

120℃时NOx转化率和N2选择性近似100%。试验结果表明

作为低温NH3选择性还原NOx的基础

MnOx/TiO2催化体系具有重要的理论与实践意义。

Abstract

A new type catalyst which contains manganese oxides supported on TiO2(MnOx/TiO2)has been prepared

and a test study on MnOx/TiO2 with various loadings of manganese and different calcination temperature for selective catalytic reduction(SCR)of NOx with NH3 under low temperature being carried out.Results show that the conversion rate of NOx increases with the amount of manganese

while the selectivity of N2 decreases with it

and the calcination temperature affecting the catalytic activity and the selectivity of N2 at the same time.By using the test means

such as x-ray diffraction(XRD)

specific surface area

porous volume

aperture

as well as Fourier transform infrared(FT-IR)spectroscope

temperaure-rise programmed reduction(TPR)and NH3 temperature programmed desorption(NH3-TPD)etc.

the optimal preparing condition for MnOx/TiO2 catalyst has been found.It has been found that:under situation of same loadings(may regard as same Mn content)

both catalytic activity and selectivity of N2 for MnO2 are higher than that of mixture for MnO2 and Mn2O3;at guaranteed hourly space velocity(GHSV)of 12 600 h-1

the conversion rate of NOx yied 97% at 80 ℃

and nearly 100% conversion rate and 100% selectivity of N2 at 120 ℃.Results of test show that the catalytic system of MnO2/TiO2

acting as a basis for SCR of NOx with NH3 under low temperature

has important theoritic and practical significance.

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STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NOx WITH NH3 UNDER LOW TEMPERATURE

DOI：10.19666/j.rlfd.2008.11.012

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references

STUDY ON A NEW TYPE CATALYST USED FOR SELECTIVE CATALYTIC REDUCTION OF NO_x WITH NH₃ UNDER LOW TEMPERATURE