| Iron-Based Composite Oxide Catalysts Tuned by CTAB Exhibit Superior NH3-SCR Performance | |
Zhang, Wenshuo; Shi, Xiaoyan; Gao, Meng; Liu, Jingjing ; Lv, Zhihui; Wang, Yingjie; Huo, Yanlong; Cui, Chang; Yu, Yunbo; He, Hong
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| 2021-02 | |
| Source Publication | CATALYSTS
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| Volume | 11Issue:2Pages:- |
| Abstract | Iron-based oxide catalysts for the NH3-SCR (selective catalytic reduction of NOx by NH3) reaction have gained attention due to their high catalytic activity and structural adjustability. In this work, iron-niobium, iron-titanate and iron-molybdenum composite oxides were synthesized by a co-precipitation method with or without the assistance of hexadecyl trimethyl ammonium bromide (CTAB). The catalysts synthesized with the assistance of CTAB (FeM0.3Ox-C, M = Nb, Ti, Mo) showed superior SCR performance in an operating temperature range from 150 degrees C to 400 degrees C compared to those without CTAB addition (FeM0.3Ox, M = Nb, Ti, Mo). To reveal such enhancement, the catalysts were characterized by N-2-physisorption, XRD (Powder X-ray diffraction), NH3-TPD (temperature-programmed desorption of ammonia), DRIFTS (Diffuse Reflectance Infrared Fourier Transform Spectroscopy), XPS (X-ray Photoelectron Spectroscopy), and H-2-TPR (H-2-Total Physical Response). It was found that the crystalline phase of Fe2O3 formed was influenced by the presence of CTAB in the preparation process, which favored the formation of crystalline gamma-Fe2O3. Owing to the changed structure, the redox-acid properties of FeM0.3Ox-C catalysts were modified, with higher exposure of acid sites and improved ability of NO oxidation to NO2 at low-temperature, both of which also contributed to the improvement of NOx conversion. In addition, the weakened redox ability of Fe prevented the over-oxidation of NH3, thus accounting for the greatly improved high-temperature activity as well as N-2 selectivity. |
| Department | 水污染控制实验室 |
| Keyword | NH3– SCR selective catalytic reduction iron-based catalysts NOx abatement |
| WOS Research Area | Chemistry, Physical |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/46052 |
| Collection | 水污染控制实验室 |
| Affiliation | 1.Chinese Acad Sci, State Key Joint Lab Environm Simulat & Pollut Con, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Wenshuo,Shi, Xiaoyan,Gao, Meng,et al. Iron-Based Composite Oxide Catalysts Tuned by CTAB Exhibit Superior NH3-SCR Performance[J]. CATALYSTS,2021,11(2):-. |
| APA | Zhang, Wenshuo.,Shi, Xiaoyan.,Gao, Meng.,Liu, Jingjing.,Lv, Zhihui.,...&He, Hong.(2021).Iron-Based Composite Oxide Catalysts Tuned by CTAB Exhibit Superior NH3-SCR Performance.CATALYSTS,11(2),-. |
| MLA | Zhang, Wenshuo,et al."Iron-Based Composite Oxide Catalysts Tuned by CTAB Exhibit Superior NH3-SCR Performance".CATALYSTS 11.2(2021):-. |
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| Iron-Based Composite（2895KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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