Hydrothermal Stability of CeO2-WO3-ZrO2 Mixed Oxides for Selective Catalytic Reduction of NOx by NH3
文献类型：期刊论文
| 作者 | Liu, Jingjing ; Shi, Xiaoyan; Shan, Yulong; Yan, Zidi; Shan, Wenpo; Yu, Yunbo; He, Hong
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2018-10-16 |
| 卷号 | 52期号:20页码:11769-11777 |
| ISSN号 | 0013-936X |
| 文献子类 | Article |
| 英文摘要 | CeO2-WO3-ZrO2 mixed oxides were prepared by the homogeneous precipitation method for the selective catalytic reduction of NOx with NH3 (NH3-SCR). The effects of hydrothermal aging on the catalytic performances of CeO2-WO3-ZrO2 were investigated. The results showed that CeO2-WO3-ZrO2 catalyst exhibited excellent NH3-SCR activity for removal of NOx and hydrothermal stability. After hydrothermal aging at 850 degrees C for 16 h, the optimum CeO2-WO3-ZrO2 catalyst could still realize 80% NOx conversion at 300-500 degrees C even under a high gas hourly space velocity of 250 000 h(-1). The structural properties, redox ability, surface species, and acidity of fresh and hydrothermally aged CeO2-WO3-ZrO2 catalysts were characterized by N-2-physisorption, XRD, Raman, H-2-TPR, XPS, NH3-TPD, and in situ DRIFTS. The characterization results showed that decreases of 89% of the surface area and 71% of the NH3 storage capacity as well as new phase formation occurred for the CeO2-WO3-ZrO2 sample after hydrothermal aging at 850 degrees C for 16 h. The activity of hydrothermally aged CeO2-WO3-ZrO2 was mainly attributed to the retention of redox-acid sites and their interaction due to the formation of Ce-Zr solid solutions and Ce4W9O33. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40815]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Liu, Jingjing,Shi, Xiaoyan,Shan, Yulong,et al. Hydrothermal Stability of CeO2-WO3-ZrO2 Mixed Oxides for Selective Catalytic Reduction of NOx by NH3[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(20):11769-11777. |
| APA | Liu, Jingjing.,Shi, Xiaoyan.,Shan, Yulong.,Yan, Zidi.,Shan, Wenpo.,...&He, Hong.(2018).Hydrothermal Stability of CeO2-WO3-ZrO2 Mixed Oxides for Selective Catalytic Reduction of NOx by NH3.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(20),11769-11777. |
| MLA | Liu, Jingjing,et al."Hydrothermal Stability of CeO2-WO3-ZrO2 Mixed Oxides for Selective Catalytic Reduction of NOx by NH3".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.20(2018):11769-11777. |
入库方式： OAI收割
来源：生态环境研究中心
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