Performance of La0.8K0.2Mn0.95Cu0.05O3 in oxidizing model soot in atmosphere mixed with SO2

LIU Xiaojuan; HUANG Bichun; FU Mingli; YE Daiqi; LIANG Hong

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Performance of La_0.8K_0.2Mn_0.95Cu_0.05O₃in oxidizing model soot in atmosphere mixed with SO₂

更新时间：2025-12-10

- Performance of La_0.8K_0.2Mn_0.95Cu_0.05O₃in oxidizing model soot in atmosphere mixed with SO₂
- CIESC Journal Issue 3, Pages: 704-711(2010)
- 作者机构：
  
  1. 华南理工大学环境科学与工程学院
  2. 工业聚集区污染控制与生态修复教育部重点实验室(华南理工大学)
  3. 广州大学化学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 March 2010，
  
  Published：05 March 2010
- 稿件说明：
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LIU Xiaojuan, HUANG Bichun, FU Mingli, et al. Performance of La_0.8K_0.2Mn_0.95Cu_0.05O₃in oxidizing model soot in atmosphere mixed with SO₂[J]. CIESC Journal, 2010, (3): 704-711.
DOI：

LIU Xiaojuan, HUANG Bichun, FU Mingli, et al. Performance of La_0.8K_0.2Mn_0.95Cu_0.05O₃in oxidizing model soot in atmosphere mixed with SO₂[J]. CIESC Journal, 2010, (3): 704-711. DOI：

摘要

采用柠檬酸络合法合成La0.8K0.2Mn0.95Cu0.05O3钙钛矿型催化剂，并用浸渍法、络合法、混合法制备了系列担载型催化剂La0.8K0.2Mn0.95Cu0.05O3/γ-Al2O3。运用程序升温氧化（TPO）对未担载及不同担载量下的催化剂进行了活性评价，并考察了在不同浓度的SO2气氛下催化剂氧化模拟炭烟的性能，采用XRD、BET和FT-IR对催化剂进行了表征。XRD和BET测试结果显示，担载前催化剂具有良好的钙钛矿结构，担载后催化剂的比表面积增大；TPO测试表明浸渍法制备担载量为20%的催化剂表现了更好的催化活性。未担载的催化剂活性较高，但催化剂担载后耐硫性能得到提高。FT-IR证实了随着SO2浓度的升高催化剂表面产生的硫酸盐物种逐渐积累从而抑制了催化剂的活性。

Abstract

La0.8K0.2Mn0.95Cu0.05O3 perovskite-type oxide was synthesized by the complex method of citric acid

then was supported on γ-Al2O3 to obtain a series of loadings by using the impregnation method

complexing method and mixing method. Temperature programmed oxidation (TPO) was used to investigate their catalytic behavior of model soot oxidation in a feed gas containing various concentrations of SO2. The catalysts were characterized with XRD

BET

and FT-IR. XRD and BET results showed that the catalysts exhibited good structure of perovskite-type before being supported

and the specific surface area increased after being supported. TPO tests revealed that the activity of La0.8K0.2Mn0.95Cu0.05O3/γ-Al2O3 prepared by the impregnation method with 20%(mass) loading was better. La0.8K0.2Mn0.95Cu0.05O3 catalyst presented higher catalytic activity than those supported ones

i. e. La0.8K0.2Mn0.95Cu0.05O3/γ-Al2O3

however

sulfur-resistance of catalysts was improved when supported on γ-Al2O3. FT-IR spectrum confirmed that with increasing concentration of SO2

the SO2-4 species formed and accumulated on the catalyst surface would inhibit the catalytic activity.

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