Iron-Based Composite Oxide Catalysts Tuned by CTAB Exhibit Superior NH3-SCR Performance
文献类型：期刊论文
| 作者 | Zhang, Wenshuo; Shi, Xiaoyan; Gao, Meng; Liu, Jingjing ; Lv, Zhihui; Wang, Yingjie; Huo, Yanlong; Cui, Chang; Yu, Yunbo; He, Hong
|
| 刊名 | CATALYSTS
 |
| 出版日期 | 2021-02 |
| 卷号 | 11期号:2页码:- |
| 关键词 | NH3– SCR selective catalytic reduction iron-based catalysts NOx abatement |
| 英文摘要 | 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. |
| WOS研究方向 | Chemistry, Physical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46052]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Joint Lab Environm Simulat & Pollut Con, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 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):-. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。