Alkali-Added Catalysts Based on LaAlO3 Perovskite for the Oxidative Coupling of Methane
Abstract
:1. Introduction
2. Materials and Methods
2.1. Catalyst Preparation
2.2. Catalyst Characterization
2.3. Catalytic Reaction
3. Results and Discussion
3.1. Formation of LaAlO3_XY (X = Li, Na, K, Y = mol %) Catalysts
3.2. Catalyst Performance of LaAlO3_XY (X = Li, Na, K, Y = mol %) Catalysts in the OCM
3.3. Catalyst Performance of LaAlO3_X5 (X = Li, Na, K) Catalysts in the OCM
3.4. Physical Properties and Chemical Composition of LaAlO3_X5 (X = Li, Na, K) Catalysts
3.5. Investigation of the Active Site of LaAlO3_X5 (X = Li, Na, K) and LaAlO3 Catalysts on the OCM
3.5.1. The Active Site of LaAlO3_X5 (X = Li, Na, K) and LaAlO3 Catalysts for C2 Selectivity and COx Selectivity
3.5.2. The Active Site of LaAlO3_X5 (X = Li, Na, K) and LaAlO3 for COx Selectivity
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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Catalyst | SBET (m2/g) a |
---|---|
LaAlO3_Li5 | 1.4 |
LaAlO3_Na5 | 2.9 |
LaAlO3_K5 | 3.1 |
LaAlO3 | 3.5 |
Catalyst | La | Al | Li | Na | K |
---|---|---|---|---|---|
mol % | |||||
LaAlO3_Li5 | 53.3 | 46.7 | - | - | - |
LaAlO3_Na5 | 52.6 | 46.3 | - | 1.1 | - |
LaAlO3_K5 | 52.8 | 46.5 | - | - | 0.7 |
Catalyst | Relative Amount (%) | Olat(e)/Olat(n) | ||
---|---|---|---|---|
Oads (533.0 eV) | Olat(e) (531.0 eV) | Olat(n) (528.8 eV) | ||
LaAlO3_Li5 | 3.6 | 38.6 | 57.9 | 0.67 |
LaAlO3_Na5 | 3.7 | 38.5 | 57.8 | 0.67 |
LaAlO3_K5 | 3.5 | 37.7 | 58.8 | 0.64 |
LaAlO3 | 3.7 | 34.6 | 61.7 | 0.56 |
Catalyst | ||||
---|---|---|---|---|
LaAlO3_Li5 | LaAlO3_Na5 | LaAlO3_K5 | LaAlO3 | |
Peak (°C) | 565.1 | 585.9 | 609.4 | 548.5 |
Peak area (a.u.) a | 1563.3 | 1842.2 | 2817.9 | 1466.0 |
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An, S.; Cho, J.; Kwon, D.; Jung, J.C. Alkali-Added Catalysts Based on LaAlO3 Perovskite for the Oxidative Coupling of Methane. ChemEngineering 2021, 5, 14. https://doi.org/10.3390/chemengineering5010014
An S, Cho J, Kwon D, Jung JC. Alkali-Added Catalysts Based on LaAlO3 Perovskite for the Oxidative Coupling of Methane. ChemEngineering. 2021; 5(1):14. https://doi.org/10.3390/chemengineering5010014
Chicago/Turabian StyleAn, Suna, JeongHyun Cho, Dahye Kwon, and Ji Chul Jung. 2021. "Alkali-Added Catalysts Based on LaAlO3 Perovskite for the Oxidative Coupling of Methane" ChemEngineering 5, no. 1: 14. https://doi.org/10.3390/chemengineering5010014