Enhancing low pressure CO2 adsorption of solvent-free derived mesoporous carbon by highly dispersed potassium species
| Autor: | Wei Wei, Lina Zhang, Nannan Sun, Yuhan Sun, Baodeng Wang, Chenming Zhu, Zhongzheng Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
Solvent free
Atmospheric pressure Ion exchange Chemistry General Chemical Engineering Potassium Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Co2 adsorption 01 natural sciences 0104 chemical sciences Adsorption Mesoporous carbon 0210 nano-technology Bar (unit) |
| Zdroj: | RSC Advances. 6:33580-33588 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra02548j |
| Popis: | Highly dispersed potassium species were introduced on a mesoporous carbon surface following an oxidation and subsequent ion exchange protocol. The samples were characterized and their CO2 adsorption performance was systematically evaluated by both static and dynamic adsorption tests. It was found that the generated surface functionality can be tuned by controlling the reaction temperature and/or using different oxidant(s), and thus potassium species can be introduced in an adjustable way without significant alteration on the textural properties of the samples. Although adsorption at atmospheric pressure was not influenced, low pressure CO2 uptake and adsorption selectivity were considerably enhanced by potassium introduction owing to the highly dispersed potassium species. A high CO2 adsorption capacity of 5.9 wt% was achieved at 25 °C and 0.15 bar with excellent cyclic stability, and the adsorbents can be readily regenerated at 115 °C under N2 purging. |
| Databáze: | OpenAIRE |
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