Enhanced cyclic CO2/N2 separation performance stability on chemically modified N-doped ordered mesoporous carbon
| Autor: | Ren Wei Chang, M. Olga Guerrero-Pérez, Rosa María Martín Aranda, Sofia Ya Hsuan Liou, Chin-Jung Lin, Miguel A. Bañares |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Kinetics 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Adsorption X-ray photoelectron spectroscopy Chemical engineering Desorption Gravimetric analysis Amine gas treating Fourier transform infrared spectroscopy 0210 nano-technology Selectivity |
| Zdroj: | Catalysis Today. 356:88-94 |
| ISSN: | 0920-5861 |
| Popis: | The modification of ordered mesoporous carbon (OMC) via NH3 heat treatment and subsequent amine refluxing at increased temperature was investigated to improve their performances for cyclic CO2/N2 separation stability and kinetics. Characterizations conducted with nitrogen adsorption/desorption isotherm, Fourier transform infrared spectroscopy, elemental analysis, and X-ray photoelectron spectroscopy demonstrated that the porosity and surface chemistry of the OMCs were tuned by modification. Adsorption evaluation with volumetric and gravimetric methods under various conditions indicated that the resulting amine-introduced N-doped OMC presented a high CO2 adsorption capacity with fast kinetics, outstanding selectivity at 50 °C and maintained superior separation performance after 20 cycles. The presence of accessible amino groups in considerable amounts renders the modified mesoporous carbon a promising candidate for CO2 capture from flue gas by using the temperature swing adsorption. |
| Databáze: | OpenAIRE |
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