Carbon dioxide adsorption properties of K-Al-Fe–based oxides prepared from a porous polymer monolith template
| Autor: | Keita Ikeue, Daisuke Yoshimoto, Munetoshi Sakai, Tarun Chand Vagvala, Masashige Suzuki, Ryutaro Usukawa, Vit Kalousek |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Bicarbonate Oxide 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Inorganic Chemistry chemistry.chemical_compound Adsorption law Materials Chemistry Calcination Physical and Theoretical Chemistry Monolith Porosity chemistry.chemical_classification geography geography.geographical_feature_category Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Ceramics and Composites Carbonate 0210 nano-technology |
| Zdroj: | Journal of Solid State Chemistry. 274:75-80 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2019.03.013 |
| Popis: | K-Al-Fe–based oxides with bimodal pores in the meso- and macro-size range were synthesized using spherical porous polymer monolith templates containing bicontinuous pore structures for use as a CO2 adsorbent. The porous K-Al-Fe–based oxides showed higher CO2 adsorption capacity than the corresponding non-porous sample. Lowering the calcination temperature during porous K-Al-Fe–based oxide synthesis from 900 °C to 450 °C led to further increases in CO2 adsorption capacity. The CO2 adsorption capacity of this porous K-Al-Fe–based oxide was significantly enhanced after H2O vapor treatment. FT-IR analysis showed that the treatment allowed for the formation of an additional CO2 capture species. The improved CO2 adsorption capacity was due to the change in the adsorption mode of CO2 from the monodentate carbonate to a bicarbonate after a reaction with H2O vapor. The thermal and structural stability of the porous K-Al-Fe–based oxide was maintained even after treatment in H2O vapor. |
| Databáze: | OpenAIRE |
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