负载型钙钛矿催化氧化NO及抗SO<sub>2</sub>性能研究

孙英; 黄妍; 赵威; 苏潜; 张俊丰; 杨柳春

负载型钙钛矿催化氧化NO及抗SO₂性能研究

湘潭大学化工学院环境科学与工程系, 湖南湘潭 411105

基金项目: 湖南省自然科学基金(12JJ3020); 湖南省高校创新平台开放基金(14K094)。

详细信息

通讯作者:
黄妍,E-mail:xtuhy@163.com。

中图分类号: X701.7
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出版历程
- 收稿日期: 2014-04-08
- 修回日期: 2014-07-15
- 刊出日期: 2014-10-30

Research on catalytic performance of supported perovskite catalyst for NO oxidation and resistance to SO₂ poisoning

Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China

摘要

摘要: 采用柠檬酸络合浸渍法制备了负载型钙钛矿氧化物La_1-xCe_xCoO₃/CeO₂(x = 0~0.3)催化剂,考察了不同Ce掺杂量对其催化氧化NO和抗硫性能的影响,并运用X射线衍射(XRD)、傅里叶红外光谱(FT-IR)、氮气物理吸附、程序升温还原(H₂-TPR)、氧气程序升温脱附(O₂-TPD)等手段对催化剂进行了表征。结果表明,催化剂的活性与其比表面积大小和氧化还原性质密切相关;其中,负载型钙钛矿La_0.8Ce_0.2CoO₃/CeO₂催化剂在300 ℃时催化氧化NO的转化率达78%。在添加CeO₂作载体后,不仅改善了非负载性钙钛矿的低温活性,而且抗硫性能也显著提高。
- 负载型钙钛矿 /
- NO氧化 /
- La_1-xCe_xCoO₃/CeO₂ /
- 抗硫
Abstract: Supported perovskite-type catalysts La_1-xCe_xCoO₃/CeO₂ (x = 0~0.3) were synthesized through complexing impregnation with citric acid and characterized by X-ray diffraction (XRD), Fourier transformed infrared (FT-IR), nitrogen adsorption, H₂ temperature-programmed reduction (H₂-TPR), and O₂ temperature-programmed desorption (O₂-TPD). The performance of NO catalytic oxidation and SO₂ resistance were investigated in the article. The results showed that the catalytic activity of La_1-xCe_xCoO₃/CeO₂ was closely related to the surface area and redox properties. Especially La_0.8Ce_0.2CoO₃/CeO₂ achieved 78% NO conversion at 300 ℃.The introduction of CeO₂ as support simultaneously enhanced the low temperature activity and SO₂ resistance.
- supported perovskite-type /
- NO oxidation /
- La_1-xCe_xCoO₃/CeO₂ /
- SO₂ resistance

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参考文献(17)

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