| Hydrothermal Aging Treatment Activates V2O5/TiO2 Catalysts for NOx Abatement | |
Lian, Zhihua; Liu, Long; Lin, Chunxi; Shan, Wenpo; He, Hong
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| 2022-06 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| ISSN | 0013-936X |
| Issue | 0Pages:1-7 |
| Abstract | Thermal stability is crucial for the practical application of deNO(x) catalysts. Vanadia-based catalysts are widely applied for the selective catalytic reduction of NOx with NH3 (NH3-SCR). Generally, hydrothermal aging at high temperatures induces the deactivation of deNO(x) catalysts. However, in this work, a remarkable increase in low-and medium-temperature NH3-SCR activity was observed for a V2O5/TiO2 catalyst after hydrothermal aging treatment, especially at 750 degrees C for 16 h. After the vanadia-based catalyst was hydrothermally treated at 750 degrees C, the specific surface area decreased and the surface VOx density and surface V ratio increased significantly. Therefore, the aged catalyst presented more abundant polymeric vanadyl species than the fresh one. Furthermore, the redox capability was improved markedly after hydrothermal treatment due to the strong interaction of vanadia and titania, contributing to the NH3-SCR reaction. 750 degrees C is the optimal temperature to activate the V2O5/TiO2 catalyst, improving the SCR performance significantly. This study provides an in-depth understanding of vanadia-based catalysts for practical applications. |
| Department | 大气环境与污染控制实验室 ; 大气环境与污染控制实验室 |
| Keyword | SCR CATALYSTS NH3-SCR REDUCTION PERFORMANCE VANADIA STABILITY TUNGSTEN TIO2 OXIDATION |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47409 |
| Collection | 大气环境与污染控制实验室 |
| Affiliation | 1.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 2.Chinese Acad Sci, Key Lab Urban Pollutant Convers, Inst Urban Environm, Xiamen 361021, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Zhejiang Key Lab Urban Environm Proc & Pollut Con, Ningbo Urban Environm Observat & Res Stn, Ningbo 315800, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, B |
| Recommended Citation GB/T 7714 | Lian, Zhihua,Liu, Long,Lin, Chunxi,et al. Hydrothermal Aging Treatment Activates V2O5/TiO2 Catalysts for NOx Abatement[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022(0):1-7. |
| APA | Lian, Zhihua,Liu, Long,Lin, Chunxi,Shan, Wenpo,&He, Hong.(2022).Hydrothermal Aging Treatment Activates V2O5/TiO2 Catalysts for NOx Abatement.ENVIRONMENTAL SCIENCE & TECHNOLOGY(0),1-7. |
| MLA | Lian, Zhihua,et al."Hydrothermal Aging Treatment Activates V2O5/TiO2 Catalysts for NOx Abatement".ENVIRONMENTAL SCIENCE & TECHNOLOGY .0(2022):1-7. |
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| Hydrothermal Aging T（2324KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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