| 涂层组分对堇青石脱硝催化剂性能的影响 |
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| 引用本文： | 金其奇,谢峻林,李凤祥,齐凯,方德,何峰. 涂层组分对堇青石脱硝催化剂性能的影响[J]. 化工进展, 2019, 38(3): 1411-1418. DOI: 10.16085/j.issn.1000-6613.2018-0554 |
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| 作者姓名： | 金其奇 谢峻林 李凤祥 齐凯 方德 何峰 |
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| 作者单位： | 武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070;武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070;武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070;武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070;武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070;武汉理工大学硅酸盐建筑材料国家重点实验室,湖北 武汉,430070 |
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| 基金项目： | 国家重点研发计划专项(2017YFB0304304) |
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| 摘 要： | 为了探究涂层组分对整体式低温选择性催化还原（SCR）脱硝催化剂性能的影响,本文使用锰氧化物（MnO x ）、氧化物涂层（TiO2、SiO2及Al2O3）、堇青石（CC）基体制备整体式涂层催化剂,考察催化剂牢固度以及脱硝活性。结果表明：在200℃ 时,对于MnO x /Al2O3/CC催化剂,MnO x 负载率为6%（质量分数）时脱硝效率最高为95%;对于MnO x /TiO2/CC,负载率为6%~12%时脱硝效率相差不大,为75%左右;对于MnO x /SiO2/CC,负载率12%时脱硝效率80%。样品牢固度排列顺序如下：MnO x /Al2O3/CC > MnO x /SiO2/CC > MnO x / TiO2 /CC。通过BET、SEM、TG、Raman、H2-TPR等测试与分析方法发现：影响催化剂性能的因素主要为活性组分MnO x 状态以及载体性能的差异。Al2O3涂层比表面积适中,作为载体活性好;SiO2涂层虽然比表面积大、牢固度好,但作为载体活性差;TiO2作为涂层比表面积较小,溶胶中溶剂挥发快使得涂层表面不均匀。
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| 关 键 词： | 选择催化还原 催化剂 载体 锰氧化物 溶胶凝胶法 |
| 收稿时间： | 2018-03-19 |
Performance of structured cordierite catalysts with different coatings for NH3-SCR |
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| Qiqi JIN,Junlin XIE,Fengxiang LI,Kai QI,De FANG,Feng HE. Performance of structured cordierite catalysts with different coatings for NH3-SCR[J]. Chemical Industry and Engineering Progress, 2019, 38(3): 1411-1418. DOI: 10.16085/j.issn.1000-6613.2018-0554 |
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| Authors: | Qiqi JIN Junlin XIE Fengxiang LI Kai QI De FANG Feng HE |
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| Affiliation: | State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070,Hubei, China |
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| Abstract: | In order to explore the influence of coating components on the performance of monolithic SCR denitration catalysts, manganese oxide (MnO x ), oxides (TiO2, SiO2, and Al2O3) coatings and Honeycomb Cordierite (CC) substrate were selected to prepare structured coating catalysts, and the firmness and the denitrification activity of the catalysts were investigated. The denitration results showed that, for MnO x /Al2O3/CC catalysts, the denitrification efficiency at 200℃ was up to 95% when MnO x loading amount was 6%. The efficiency was about 75% for MnO x /TiO2/CC as the loading was from 6% to 12% and it was 80% with 12% loading for the MnO x /SiO2/CC. The sample firmness was in the order: MnO x /Al2O3/CC>MnO x /SiO2/CC>MnO x /TiO2/CC. Through BET, SEM, TG, Raman, H2-TPR and other analysis methods, it was found that the differences between the state of active component MnO x and the performance of the carrier were the main influence factors on the performance of catalysts. The Al2O3 coating had moderate specific surface area, and showed good activity as carrier. SiO2 coating had high specific surface area and good firmness, but it acted poorly as carrier. TiO2 had relatively small specific surface area, and the solvent evaporation in the sol was fast, resulting in an uneven coating surface uneven. |
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| Keywords: | selective catalytic reduction catalyst support manganese oxide x sol-gel method |
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