Ca Doping Effect on the Competition of NH3-SCR and NH3 Oxidation Reactions over Vanadium-Based Catalysts
文献类型：期刊论文
| 作者 | Zheng, Yang1,2; Guo, Yangyang2; Wang, Jian2; Luo, Lei2; Zhu, Tingyu2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2021-03-25 |
| 卷号 | 125期号:11页码:6128-6136 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.1c00677 |
| 英文摘要 | The Ca poisoning effect constrains vanadium-based catalysts from further application in high-calcium content flue gas, and the deactivation effect of CaO on V2O5-WO3/TiO2 (VWT) and V2O5/TiO2 (VT) catalysts has been investigated from a new perspective. As the NH3 selective catalytic reduction (NH3-SCR) results showed, the NO conversion at 400 degrees C declined by 71.7% for VT and by 34.8% for VWT after CaO doping, and the decrease in NO conversion for NH3-SCR at temperatures greater than 300 degrees C was mainly caused by the competition of the NH3 oxidation reaction. The characterization of catalysts by NH3-SCR, XRD, Raman spectroscopy, H-2-TPR, NH3-TPD, and TEM showed that the number of surface acid sites decreased and that the oxidation and reduction properties of the catalysts all deteriorated after CaO doping, which is the primary reason for the decrease in NO conversion. CaO also affected NH3 oxidation, and the L-NH3 adsorbed on CaO favored the NH3 oxidation reaction, as DRIFTS showed. NH3 reaction pathways changed by CaO doping because NH3 oxidation becomes more competitive at temperatures greater than 300 degrees C. Density functional theory (DFT) calculations confirmed the NO formation pathway on CaO, and the competition mechanism of NH3-SCR and NH3 oxidation reactions has been described, which has hardly been reported. |
| 资助项目 | National Key Research and Development Program of China[2017YFC021080401] ; National Science Foundation of China[51778600] ; Department of Science and Technology of Hebei Province[19273715D] ; National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment[NEL-KF-2019017] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000635441700018 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Key Research and Development Program of China ; National Science Foundation of China ; Department of Science and Technology of Hebei Province ; National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/48350]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Guo, Yangyang; Zhu, Tingyu |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yang,Guo, Yangyang,Wang, Jian,et al. Ca Doping Effect on the Competition of NH3-SCR and NH3 Oxidation Reactions over Vanadium-Based Catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2021,125(11):6128-6136. |
| APA | Zheng, Yang,Guo, Yangyang,Wang, Jian,Luo, Lei,&Zhu, Tingyu.(2021).Ca Doping Effect on the Competition of NH3-SCR and NH3 Oxidation Reactions over Vanadium-Based Catalysts.JOURNAL OF PHYSICAL CHEMISTRY C,125(11),6128-6136. |
| MLA | Zheng, Yang,et al."Ca Doping Effect on the Competition of NH3-SCR and NH3 Oxidation Reactions over Vanadium-Based Catalysts".JOURNAL OF PHYSICAL CHEMISTRY C 125.11(2021):6128-6136. |
入库方式： OAI收割
来源：过程工程研究所
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。