Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3 | |
Fan, Hao1,2; Fan, Jie1; Chang, Tian3; Wang, Xiuru1; Wang, Xin4; Huang, Yu2; Zhang, Yang5; Shen, Zhenxing1,2 | |
通讯作者 | Shen, Zhenxing(zxshen@mail.xjtu.edu.cn) |
2021-08-23 | |
发表期刊 | CATALYSIS SCIENCE & TECHNOLOGY |
ISSN | 2044-4753 |
页码 | 11 |
摘要 | Exhaust gas from the sintering process in the iron and steel industry contains NOx and SO2 at low temperature. Therefore, the corresponding denitration catalyst should have favorable low-temperature activity and SO2 resistance. In this study, an Fe-doped MnO2 nanotube catalyst with the (211) crystal face synthesized using a one-step hydrothermal synthesis method demonstrated favorable pore structure and many weak acidic sites, which improved its low-temperature activity (>90% at 125-225 degrees C), N-2 selectivity (>90%), and SO2 resistance. The NO conversion rate reached 94% when the Fe0.5%MnO2 catalyst was used in the presence of SO2. Moreover, the Fe in the Fe0.5%MnO2 catalyst improved the reducibility of the surface Mn sites and reduced the oxidizing properties of bridging oxygen, resulting in easier conversion of Mn4+ to Mn3+ and affecting the regeneration of oxygen vacancies in the selective catalytic reduction of NOx with NH3 process. In situ diffuse reflectance infrared spectroscopy showed that the reduction of NOx in the MnO2 nanotubes and Fe0.5%MnO2 sample involved the Eley-Rideal mechanism, whereas the NH3-SCR process of the Fe5%MnO2 sample involved both Langmuir-Hinshelwood and Eley-Rideal mechanisms. |
DOI | 10.1039/d1cy01181b |
关键词[WOS] | IN-SITU DRIFTS ; SULFUR RESISTANT CATALYST ; MODIFIED MNOX/TIO2 ; REACTION-MECHANISM ; MIXED OXIDES ; NH3-SCR ; SO2 ; PERFORMANCE ; ALPHA-MNO2 ; COMPOSITE |
收录类别 | SCI ; SCI |
语种 | 英语 |
资助项目 | State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences[SKLLQG1919] |
WOS研究方向 | Chemistry |
项目资助者 | State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences |
WOS类目 | Chemistry, Physical |
WOS记录号 | WOS:000693982800001 |
出版者 | ROYAL SOC CHEMISTRY |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/16970 |
专题 | 粉尘与环境研究室 |
通讯作者 | Shen, Zhenxing |
作者单位 | 1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710049, Peoples R China 3.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China 4.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA USA 5.Xi An Jiao Tong Univ, Instrumental Anal Ctr Xian Jiaotong Univ, Xian 710049, Peoples R China |
推荐引用方式 GB/T 7714 | Fan, Hao,Fan, Jie,Chang, Tian,et al. Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3[J]. CATALYSIS SCIENCE & TECHNOLOGY,2021:11. |
APA | Fan, Hao.,Fan, Jie.,Chang, Tian.,Wang, Xiuru.,Wang, Xin.,...&Shen, Zhenxing.(2021).Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3.CATALYSIS SCIENCE & TECHNOLOGY,11. |
MLA | Fan, Hao,et al."Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3".CATALYSIS SCIENCE & TECHNOLOGY (2021):11. |
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