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| Destructive and Protective Effects of NH3 on the Low-Temperature Hydrothermal Stability of SAPO-34 and Cu-SAPO-34 | |
| Ma, Yue1; Gao, Yang1; Wu, Xiaodong1; Jin, Baofang3; Ran, Rui1; Si, Zhichun2; Weng, Duan1,2 | |
| 2022-09-15 | |
| Source Publication | ACS APPLIED MATERIALS & INTERFACES
 |
| ISSN | 1944-8244 |
| Pages | 14 |
| Abstract | The influences of gaseous, weakly adsorbed, and strongly adsorbed NH3 on the low-temperature (<100 degrees C) hydrothermal stability of SAPO-34 and Cu-SAPO-34 were investigated. NH3 temperature-programmed desorption (NH3-TPD), H-1 magic angle spinning nuclear magnetic resonance (MAS NMR), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) were adopted to characterize the adsorption states of NH3 and H2O in SAPO-34, and the destruction of the SAPO-34 framework was revealed by direct and cross-polarization Si-29, Al-27, and P-31 MAS NMR. Gaseous NH3 coadsorbed with H2O inside SAPO-34 micropores and induced the hydrolysis of framework P-O-Al and Si-O(H)-Al bonds. Weakly adsorbed NH3 was released during aging and played a similar negative role to gaseous NH3. When being combined with hydrolyzed Al species from the framework, active Cu ions transformed to inactive CuAl2O4-like species, leading to deactivation in low-temperature SCR of Cu-SAPO-34. Strongly adsorbed NH4+ via 200 degrees C preadsorption protected the framework integrity of SAPO-34 and the SCR activity of Cu-SAPO-34. |
| Keyword | SAPO-34 ammonia hydrolysis MAS NMR copper aluminates |
| DOI | 10.1021/acsami.2c13890 |
| Language | 英语 |
| WOS Keyword | SELECTIVE CATALYTIC-REDUCTION ; STRUCTURE DIRECTING AGENTS ; SILICOALUMINOPHOSPHATES H-SAPO-34 ; MOISTURE STABILITY ; CU/SAPO-34 ; NH3-SCR ; CU-SSZ-13 ; ZEOLITES ; HYDRATION ; NMR |
| Funding Project | National Natural Science Foundation of China[22276106] ; National Key R&D Program of China[2017YFC0211202] ; National Engineering Laboratory for Mobile Source Emission Control Technology[S2020A08] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| Funding Organization | National Natural Science Foundation of China ; National Key R&D Program of China ; National Engineering Laboratory for Mobile Source Emission Control Technology |
| WOS ID | WOS:000859005300001 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/54703 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Wu, Xiaodong; Weng, Duan |
| Affiliation | 1.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China 2.Tsinghua Univ, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Ma, Yue,Gao, Yang,Wu, Xiaodong,et al. Destructive and Protective Effects of NH3 on the Low-Temperature Hydrothermal Stability of SAPO-34 and Cu-SAPO-34[J]. ACS APPLIED MATERIALS & INTERFACES,2022:14. |
| APA | Ma, Yue.,Gao, Yang.,Wu, Xiaodong.,Jin, Baofang.,Ran, Rui.,...&Weng, Duan.(2022).Destructive and Protective Effects of NH3 on the Low-Temperature Hydrothermal Stability of SAPO-34 and Cu-SAPO-34.ACS APPLIED MATERIALS & INTERFACES,14. |
| MLA | Ma, Yue,et al."Destructive and Protective Effects of NH3 on the Low-Temperature Hydrothermal Stability of SAPO-34 and Cu-SAPO-34".ACS APPLIED MATERIALS & INTERFACES (2022):14. |
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