Insight into solid-state ion-exchanged Cu-based zeolite (SSZ-13, SAPO-18, and SAPO-34) catalysts for the NH3-SCR reaction: The promoting role of NH4-form zeolite substrates
文献类型：期刊论文
| 作者 | Zhang, Shoute5; Chen, Junwu1; Meng, Ying5; Pang, Lei6; Guo, Yanbing2; Luo, Zhu2; Fang, Yarong2; Dong, Yahao3; Cai, Weiquan4; Li, Tao5 |
| 刊名 | Applied Surface Science
 |
| 出版日期 | 2022 |
| 卷号 | 571 |
| 关键词 | Heavy ions - Copper compounds - Nitrogen oxides - Catalysts - Reaction intermediates - Zeolites - Ammonia |
| ISSN号 | 1694332 |
| DOI | 10.1016/j.apsusc.2021.151328 |
| 英文摘要 | In this paper, Cu-exchanged SSZ-13, SAPO-18, and SAPO-34 were synthesized via a novel green and sustainable solid-state ion-exchange (SSIE) route with excellent NH3-SCR activities, which could simplify the preparation process and reduce the wastewater production in comparison to conventional aqueous ion-exchange route. The results also proved that Cu-exchanged zeolites synthesized by SSIE technology presented higher Cu ion-exchange (IE) levels and better SCR activities than those prepared via the traditional incipient impregnation route. In the case of SSIE, the usage of NH4-form substrates could achieve more Cu2+ ions and fewer CuOx than those H-form substrates since the formation of Cu(NH3)x2+ intermediate could promote the Cu2+ mobility to facilitate Cu2+ occupying IE sites, which was favorable for the SCR reaction. The combined DFT data confirmed the SSIE reaction energy barriers between Cu(NO3)2 and the NH4-form substrates were almost identical, whereas the higher reaction energy was required for H-form substrates. In-situ DRIFTS results manifested the labile species like NH4+, 鈥揘H2, NO2鈥? NO3鈥? NO2, etc were the reaction intermediates over the catalysts prepared from NH4-form substrates. The Langmuir-Hinshelwood ('L-H') and Eley-Rideal ('E-R') mechanisms contributed collectively over both Cu-SSZ-13 and Cu-SAPO-18 in the SCR reaction, however, the 'L-H' mechanism dominated over Cu-SAPO-34. 漏 2021 Elsevier B.V. |
| 学科主题 | Ion Exchange |
| 项目编号 | The authors thanks for the financial supporting by the Recruitment Program of Global Young Experts start-up funds, the China Postdoctoral Science Foundation ( 2019 M662630 ), Huazhong University of Science and Technology Analytical and Testing Center is also acknowledged. |
| 出版者 | Elsevier B.V. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61318]  |
| 作者单位 | 1.Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 2.Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan; 430079, China 3.Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang; 453007, China 4.School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou; 510006, China 5.Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan; 430074, China 6.DongFeng Trucks R&D Center, Zhushanhu Road No. 653, Wuhan; 430056, China |
| 推荐引用方式 GB/T 7714 | Zhang, Shoute,Chen, Junwu,Meng, Ying,et al. Insight into solid-state ion-exchanged Cu-based zeolite (SSZ-13, SAPO-18, and SAPO-34) catalysts for the NH3-SCR reaction: The promoting role of NH4-form zeolite substrates[J]. Applied Surface Science,2022,571. |
| APA | Zhang, Shoute.,Chen, Junwu.,Meng, Ying.,Pang, Lei.,Guo, Yanbing.,...&Li, Tao.(2022).Insight into solid-state ion-exchanged Cu-based zeolite (SSZ-13, SAPO-18, and SAPO-34) catalysts for the NH3-SCR reaction: The promoting role of NH4-form zeolite substrates.Applied Surface Science,571. |
| MLA | Zhang, Shoute,et al."Insight into solid-state ion-exchanged Cu-based zeolite (SSZ-13, SAPO-18, and SAPO-34) catalysts for the NH3-SCR reaction: The promoting role of NH4-form zeolite substrates".Applied Surface Science 571(2022). |
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来源：过程工程研究所
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