Insight into the Microstructure and Deactivation Effects on Commercial NiMo/γ-Al2O3 Catalyst through Aberration-Corrected Scanning Transmission Electron Microscopy
Abstract
:1. Introduction
2. Results and Discussion
2.1. Atomic-Resolution Microstructure
2.2. Structural Variations with the Decreasing of Catalytic Activity
2.3. Deactivation Effects
2.3.1. Ni Segregation from the Active Phase
2.3.2. Coke Deposition
3. Materials and Methods
3.1. Catalyst Preparations
3.2. Catalytic Activity Evaluation
3.3. Catalyst Characterizations
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Catalyst | HDS (%) | HDN (%) |
---|---|---|
Cat A | - | - |
Cat B | 98.81 | 99.76 |
Cat C | 88.50 | 85.43 |
Cat D | 85.84 | 84.30 |
Sample | Mean Atomic Ratio of Ni (%) | Ratio of Ni/Mo+S (%) | Number of Examined Regions |
---|---|---|---|
Cat A | 2.53 | 0.0788 | 50 |
Cat B | 2.23 | 0.0782 | 50 |
Cat C | 1.52 | 0.0466 | 50 |
Cat D | 0.45 | 0.0326 | 50 |
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He, W.; Hu, A.; Qiu, L.; Wang, W.; Xiang, Y.; Han, W.; Xu, G.; Zhang, L.; Zheng, A. Insight into the Microstructure and Deactivation Effects on Commercial NiMo/γ-Al2O3 Catalyst through Aberration-Corrected Scanning Transmission Electron Microscopy. Catalysts 2019, 9, 810. https://doi.org/10.3390/catal9100810
He W, Hu A, Qiu L, Wang W, Xiang Y, Han W, Xu G, Zhang L, Zheng A. Insight into the Microstructure and Deactivation Effects on Commercial NiMo/γ-Al2O3 Catalyst through Aberration-Corrected Scanning Transmission Electron Microscopy. Catalysts. 2019; 9(10):810. https://doi.org/10.3390/catal9100810
Chicago/Turabian StyleHe, Wenhui, Anpeng Hu, Limei Qiu, Wei Wang, Yanjuan Xiang, Wei Han, Guangtong Xu, Le Zhang, and Aiguo Zheng. 2019. "Insight into the Microstructure and Deactivation Effects on Commercial NiMo/γ-Al2O3 Catalyst through Aberration-Corrected Scanning Transmission Electron Microscopy" Catalysts 9, no. 10: 810. https://doi.org/10.3390/catal9100810