Preparation of nano-sized Mg-doped copper silicate materials using coal gangue as the raw material and its characterization for CO2 adsorption
| Autor: | Huayan Si, Zhaojun Wu, Fu Li, Kai Liu, Jianbin Zhang, Yu Wu, Yujie Pang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite General Chemical Engineering Infrared spectroscopy chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Copper Silicate chemistry.chemical_compound Adsorption 020401 chemical engineering Chemical engineering chemistry X-ray photoelectron spectroscopy Freundlich equation 0204 chemical engineering 0210 nano-technology Mesoporous material |
| Zdroj: | Korean Journal of Chemical Engineering. 37:1786-1794 |
| ISSN: | 1975-7220 0256-1115 |
| DOI: | 10.1007/s11814-020-0593-3 |
| Popis: | This work presents a simple method for the preparation of the Mg-doped nanocomposite copper silicates (Mgx-Cu1−x-SiO3) (x=0.25, 0.5, 0.75 and 0.9) using coal gangue waste as the silicon source for CO2 capture at low temperature. The as-prepared Mgx-Cu1−x-SiO3 was systemically characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller surface area analysis (BET). The results suggest that all Mgx-Cu1−x-SiO3 possess large surface areas, micropores and mesoporous structures composed of the agglomerates of small nanoparticles. They exhibit high CO2 adsorption capacity at 298.15 K under 1 bar, and that of Mg0.9-Cu0.1-SiO3 was the highest with the value of 16.73 cm3/g. The Freundlich isotherm model fits the CO2 adsorption isotherm well. Thermodynamic analysis indicates that the CO2 adsorption on Mg0.9-Cu0.1-SiO3 is exothermic (ΔH° |
| Databáze: | OpenAIRE |
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