A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH3-SCR
文献类型：期刊论文
| ; | |
| 作者 | BSRF用户 |
| 刊名 | JOURNAL OF RARE EARTHS
 ; JOURNAL OF RARE EARTHS
|
| 出版日期 | 2021 ; 2021 |
| 卷号 | 39期号:8页码:969--978 |
| ISSN号 | 1002-0721 ; 1002-0721 |
| DOI | 10.1016/j.jre.2020.08.016 ; 10.1016/j.jre.2020.08.016 |
| 文献子类 | Article ; Article |
| 英文摘要 | Ce- or La-doped Cu/SSZ-13 catalysts were prepared by a hydrothermal method and Cu, Ce or La ions were incorporated through stepwise ion exchange. The catalyst activity was measured for the ammonia selective catalytic reduction reaction. The structure and composition of catalyst were characterized by using X-ray diffraction, scanning electron microscopy, inductively coupled plasma mass spectrometry solid-state NMR, NH3-TPD techniques, and the active components were examined by XPS and XANES. The results indicate that the Ce and La doping can both completely preserve the SCR activity of Cu/SSZ-13 above 300 degrees C, but there is also a decrease of activity below 200 degrees C. On the other hand, Ce doping is beneficial to the formation of framework aluminum, stabilizes molecular sieve framework and Cu active sites of Cu/SSZ-13, thereby improves the catalyst hydrothermal stability. But La doping will decrease the amount of framework aluminum and Cu active sites of Cu/SSZ-13 after hydrothermally aging, even destroy zeolite CHA structure. This is quite harmful to the catalyst hydrothermal stability. (c) 2021 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.; Ce- or La-doped Cu/SSZ-13 catalysts were prepared by a hydrothermal method and Cu, Ce or La ions were incorporated through stepwise ion exchange. The catalyst activity was measured for the ammonia selective catalytic reduction reaction. The structure and composition of catalyst were characterized by using X-ray diffraction, scanning electron microscopy, inductively coupled plasma mass spectrometry solid-state NMR, NH3-TPD techniques, and the active components were examined by XPS and XANES. The results indicate that the Ce and La doping can both completely preserve the SCR activity of Cu/SSZ-13 above 300 degrees C, but there is also a decrease of activity below 200 degrees C. On the other hand, Ce doping is beneficial to the formation of framework aluminum, stabilizes molecular sieve framework and Cu active sites of Cu/SSZ-13, thereby improves the catalyst hydrothermal stability. But La doping will decrease the amount of framework aluminum and Cu active sites of Cu/SSZ-13 after hydrothermally aging, even destroy zeolite CHA structure. This is quite harmful to the catalyst hydrothermal stability. (c) 2021 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths. |
| WOS研究方向 | Chemistry ; Chemistry |
| 语种 | 英语 ; 英语 |
| WOS记录号 | WOS:000669781400010 ; WOS:000669781400010 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/293670]  |
| 专题 | 北京同步辐射装置 |
| 推荐引用方式 GB/T 7714 | BSRF用户. A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH3-SCR, A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH3-SCR[J]. JOURNAL OF RARE EARTHS, JOURNAL OF RARE EARTHS,2021, 2021,39, 39(8):969--978, 969--978. |
| APA | BSRF用户.(2021).A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH3-SCR.JOURNAL OF RARE EARTHS,39(8),969--978. |
| MLA | BSRF用户."A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH3-SCR".JOURNAL OF RARE EARTHS 39.8(2021):969--978. |
入库方式： OAI收割
来源：高能物理研究所
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