收稿日期: 2022-04-01
网络出版日期: 2022-11-23
Study on denitration performance of Y doped Fe2O3 catalyst
Received date: 2022-04-01
Online published: 2022-11-23
为提升三氧化二铁（Fe2O3）催化剂的脱硝性能，扩展催化剂的活性温度窗口，采用共沉淀法引入助剂钇（Y）元素对Fe2O3催化剂进行改性。通过X射线衍射（XRD）、氮气等温吸-脱附（N2-BET）、X射线光电子能谱（XPS）、氨气程序升温脱附（NH3-TPD）、氢气程序升温还原（H2-TPR）等表征方法对样品进行了表征分析。XRD和N2-BET结果表明，Y的掺杂使催化剂结构发生变化，比表面积增加、孔径减小。XPS和NH3-TPD结果证明，Y掺杂Fe2O3具有更多的表面吸附氧（OⅠ）、Fe2+以及更多的酸量。H2-TPR结果表明，Y的掺杂使催化剂的氧化还原能力略有下降。测试了不同含量Y掺杂的Fe2O3催化剂在150~400 ℃的脱硝性能，其中Fe9Y1O x 催化剂的脱硝活性最佳，在300 ℃达到81.8%。
杜沛佞 , 罗仕忠 , 谭仁俊 , 敬方梨 . 钇掺杂三氧化二铁催化剂的脱硝性能研究[J]. 无机盐工业, 2022 , 54(11) : 137 -142 . DOI: 10.19964/j.issn.1006-4990.2022-0090
In order to improve the denitration performance of Fe2O3 catalyst and expand the active temperature window of the catalyst，the co-precipitation method was used to introduce the promoter Y to modify the Fe2O3 catalyst.The samples were characterized by X-ray diffraction（XRD），N2 isothermal adsorption desorption（N2-BET），X-ray photoelectron spectroscopy（XPS），NH3 temperature programmed desorption（NH3-TPD） and H2 temperature programmed reduction（H2-TPR）.The XRD and N2-BET results showed that doping of Y changed the catalyst structure，increased the specific surface area and reduced pore size of the catalyst.The XPS and NH3-TPD demonstrated that Y-doped Fe2O3 had more surface adsorbed oxygen（OI），Fe2+ and more acid amount.The H2-TPR results showed that Y doping slightly reduced the redox ability of the catalyst.The denitration performance of Fe2O3 catalysts doped with different contents of Y at 150~400 ℃ was tested.Fe9Y1O x catalyst had the best denitration activity，reaching 81.8% at 300 °C.
Key words： yttrium; denitration catalyst; Fe2O3
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