Study on the performance of NiO/ZnxZr1−x catalysts for CO2 hydrogenation
| Autor: | Shuai Chang, Wenshuo Mao, Gaocheng Qu, Wei Na, Hua Wang, Gao Wengui |
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| Rok vydání: | 2020 |
| Předmět: |
Molar mass
Materials science General Chemical Engineering Non-blocking I/O Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy Chemical engineering chemistry Methanation 0210 nano-technology Solid solution |
| Zdroj: | RSC Advances. 10:42790-42798 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/d0ra07660k |
| Popis: | The NiO/ZnxZr1−x (x represents the molar mass of Zn) catalyst was prepared by the impregnation method and tested in CO2 methanation. The activity results show that NiO/Zn0.3Zr0.7 has a higher CO2 conversion rate and methane selectivity than NiO/ZnO and NiO/ZnO–ZrO2. Combined with N2 adsorption–desorption, H2-TPR, CO2-TPD, H2-TPD, XRD, TEM, XPS and FTIR and other characterization methods, the physical and chemical properties of NiO/ZnO–ZrO2 were studied. The incorporation of ZnO into NiO/ZrO2 forms a ZnO–ZrO2 solid solution, and the combination of the solid solution weakens the interaction between NiO and the oxide support, thereby promoting the reduction and dispersion of NiO. The H2-TPR experiment results show that, because ZnO–ZrO2 forms a solid solution, NiO is better dispersed on the surface, resulting in a significant reduction in the reduction temperature of NiO. Using FTIR to conduct CO2 adsorption and methanation experiments on NiO/ZnxZr1−x to determine the adsorbed species and intermediates, the results show that CO2 methanation follows the formate pathway. |
| Databáze: | OpenAIRE |
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