Simultaneously achieving selective catalytic reduction of NOx with NH3 and catalytic oxidation of CO with O-2 over one finely optimized bifunctional catalyst Mn2Cu1Al1Ox at low temperatures
文献类型：期刊论文
| 作者 | Gui, Rongrong1,2; Xiao, Jiewen1,2; Gao, Yanshan1,2; Li, Yuran3; Zhu, Tingyu3; Wang, Qiang1,2 |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2022-06-05 |
| 卷号 | 306页码:16 |
| 关键词 | Multi-pollutant control NH3-SCR CO oxidation Dual active sites Competitive adsorption |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2022.121104 |
| 英文摘要 | For coke oven flue gases, the simultaneous removal of NOx and CO pollutants is highly demanded but still re-mains a big challenge. So far there isn't a single efficient catalyst that can simultaneously achieve selective catalytic reduction of NOx by NH3 and the catalytic oxidation of CO to CO2 in the presence of excessive O-2 at low temperatures (180-220 ?). Here, we report a bifunctional catalyst Mn2Cu1Al1Ox that possesses dual active sites and is highly active for both NH3-SCR and CO oxidation reactions under the above mentioned conditions. By tuning the redox properties and surface oxygen vacancies, the optimized Mn2Cu1Al1Ox catalyst achieved high conversions of both NOx and CO in the NH3-NO-CO-O-2 system, with a NOx conversion of 86.8% and a CO conversion of 100% at 200 ?. The active reaction sites and the interaction principal between NH3-SCR and CO oxidation reactions were thoroughly investigated by well-designed experiments, in-situ DRIFTS and DFT calculations. It was revealed that NH3 and CO competed for the same active sites, which significantly influenced the catalytic performance of Mn3Al1Ox and Cu3Al1Ox for CO oxidation reactions. For the bifunctional Mn2Cu1Al1Ox catalyst, CO is more easily adsorbed on the Cu sites, while NH3 is more inclined to adsorb on the Mn sites, which enables both NH3-SCR and CO oxidation reactions to proceed simultaneously on one catalyst. The improvement of CO oxidation performance on Mn2Cu1Al1Ox catalyst is mainly attributed to the reduced Jahn-Teller effect of Cu atoms by doping into Mn3O4, which leads to the lift of d-band center and finally enhances the CO adsorption. |
| WOS关键词 | MANGANESE OXIDE CATALYSTS ; METAL-ORGANIC FRAMEWORKS ; MIXED OXIDES ; COPPER ; PERFORMANCE ; NH3-SCR ; ADSORPTION ; MECHANISM ; CERIUM |
| 资助项目 | Fundamental Research Funds for the Central Universities[2019JQ03015] ; National Natural Science Foundation of China[U1810209] ; National Natural Science Foundation of China[42075169] ; Beijing Municipal Education Commission through the Innovative Transdisciplinary Program "Ecological Restoration Engineering" |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000783879600001 |
| 出版者 | ELSEVIER |
| 资助机构 | Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; Beijing Municipal Education Commission through the Innovative Transdisciplinary Program "Ecological Restoration Engineering" |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/52961]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Wang, Qiang |
| 作者单位 | 1.Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Poll, Beijing 100083, Peoples R China 2.Beijing Forestry Univ, Coll Environm Sci & Engn, Engn Res Ctr Water Pollut Source Control & Ecorem, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 |
Gui, Rongrong,Xiao, Jiewen,Gao, Yanshan,et al. Simultaneously achieving selective catalytic reduction of NOx with NH3 and catalytic oxidation of CO with O-2 over one finely optimized bifunctional catalyst Mn2Cu1Al1Ox at low temperatures [J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2022,306:16. |
| APA |
Gui, Rongrong,Xiao, Jiewen,Gao, Yanshan,Li, Yuran,Zhu, Tingyu,&Wang, Qiang.(2022). Simultaneously achieving selective catalytic reduction of NOx with NH3 and catalytic oxidation of CO with O-2 over one finely optimized bifunctional catalyst Mn2Cu1Al1Ox at low temperatures .APPLIED CATALYSIS B-ENVIRONMENTAL,306,16. |
| MLA |
Gui, Rongrong,et al." Simultaneously achieving selective catalytic reduction of NOx with NH3 and catalytic oxidation of CO with O-2 over one finely optimized bifunctional catalyst Mn2Cu1Al1Ox at low temperatures ".APPLIED CATALYSIS B-ENVIRONMENTAL 306(2022):16. |
入库方式： OAI收割
来源：过程工程研究所
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