Mechanism study on SO2 poisoning of Fe<italic style="font-style: italic">x</italic>MnCe1-AC catalyst for low-temperature SCR

CHEN Xiaoxue; SONG Min; MENG Fanyue; WEI Yuexing

doi:10.11949/0438-1157.20190318

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Mechanism study on SO₂ poisoning of Fe_xMnCe₁-AC catalyst for low-temperature SCR

更新时间：2026-07-24

- Mechanism study on SO₂ poisoning of Fe_xMnCe₁-AC catalyst for low-temperature SCR
- CIESC Journal Vol. 70, Issue 8, Pages: 3000-3010(2019)
- 作者机构：
  
  东南大学能源与环境学院，能源热转换及其过程测控教育部重点实验室，江苏南京 210096
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190318
  CLC： TQ 028.8
- Received：01 April 2019，
  
  Revised：2019-06-20，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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陈潇雪, 宋敏, 孟凡跃, 卫月星. Fe_xMnCe₁-AC低温SCR催化剂SO₂中毒机理研究[J]. 化工学报, 2019, 70(8): 3000-3010 DOI: 10.11949/0438-1157.20190318.

CHEN Xiaoxue, SONG Min, MENG Fanyue, WEI Yuexing. Mechanism study on SO₂ poisoning of Fe_xMnCe₁-AC catalyst for low-temperature SCR[J]. CIESC Journal, 2019, 70(8): 3000-3010 DOI: 10.11949/0438-1157.20190318.
陈潇雪, 宋敏, 孟凡跃, 卫月星. Fe_xMnCe₁-AC低温SCR催化剂SO₂中毒机理研究[J]. 化工学报, 2019, 70(8): 3000-3010 DOI: 10.11949/0438-1157.20190318. DOI：

CHEN Xiaoxue, SONG Min, MENG Fanyue, WEI Yuexing. Mechanism study on SO₂ poisoning of Fe_xMnCe₁-AC catalyst for low-temperature SCR[J]. CIESC Journal, 2019, 70(8): 3000-3010 DOI: 10.11949/0438-1157.20190318. DOI：

摘要

以活性炭为载体，通过超声辅助浸渍法制备了一系列Fe

MnCe

-AC催化剂，考察了该系列催化剂的低温NH

-SCR脱硝活性，确立了活性最佳的催化剂，并探究了SO

对其脱硝性能的影响。结果表明，Fe

0.1

MnCe

-AC催化剂低温脱硝活性最高，在120~220℃范围内NO的转化率均在90%以上（无SO

）。此外，在180℃、SO

浓度为429 mg/m

时，该催化剂仍能保持77%左右的脱硝率。通过BET、XRD、XPS、H

-TPR、NH

-TPD、FT-IR、TGA等表征手段对催化剂的SO

中毒机理进行了分析。研究发现，SO

能与NH

及催化剂中金属组分生成硫酸铵盐((NH

)

、(NH

)

)、MnSO

等物质，改变了原催化剂孔道结构并减少了催化剂表面Brönsted和Lewis酸性位点，抑制了催化剂吸附NH

的能力。更多地，SO

促使催化剂中Mn

、Ce

、Fe

和Fe

—OH

基团数量下降，表面可还原物质减少，从而降低了催化剂的脱硝活性。

Abstract

A series of Fe

MnCe

-AC catalysts were prepared by ultrasonic-assisted impregnation method with activated carbon as carrier. The low-temperature NH

-SCR denitrification activity of the catalysts was investigated

and the best activity catalyst was established. The effect of SO

on its denitration performance was also explored. The results showed that Fe

0.1

MnCe

-AC catalyst exhibited best denitration efficiency at low-temperature among prepared catalysts

e conversion rate of NO exceeded 90% with the temperature range from 120℃ to 220℃ (no SO

). In addition

the catalyst could maintain NO conversion rate of approximately 77% under the atmosphere of 180℃ and SO

concentration of 429 mg/m

. The mechanism of SO

poisoning on the catalyst was characterized with BET

XRD

XPS

-TPR NH

-TPD

FT-IR and TGA. It was observed that SO

could form ammonium sulfate ( (NH

)

(NH

)

and MnSO

with NH

and the metal components in the catalyst

which changed the pore structure of the fresh catalyst and reduced the Brönsted acid sites and Lewis acid sites on the catalyst surface. These variation made the inhibitory effect on the catalytic adsorption capacity of NH

. Moreover

also promoted a decrease in the number of Mn

and Fe

—OH

groups in the catalyst

and lessened the surface reducible species

thereby reducing the activity of the catalyst denitration.

关键词

Keywords

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⁰

Mechanism study on SO2 poisoning of FexMnCe1-AC catalyst for low-temperature SCR

DOI：10.11949/0438-1157.20190318

摘要

Abstract

关键词

Keywords

references

Mechanism study on SO₂ poisoning of Fe_xMnCe₁-AC catalyst for low-temperature SCR