Insights in CO2 interaction on zeolite omega-supported polyol dendrimers
| Autor: | René Roy, Imene Terrab, Abdelkader Bengueddach, Nabila Bouchiba, Abdelkrim Azzouz, Rachida Hamacha, Bouhadjar Boukoussa |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Chemistry Inorganic chemistry 02 engineering and technology Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Differential scanning calorimetry Adsorption Chemical engineering Polyol law Dendrimer Moiety Physical and Theoretical Chemistry Crystallization 0210 nano-technology Zeolite Instrumentation |
| Zdroj: | Thermochimica Acta. 624:95-101 |
| ISSN: | 0040-6031 |
| DOI: | 10.1016/j.tca.2015.11.004 |
| Popis: | Omega-type zeolite was prepared by hydrothermal crystallization method, then impregnated with different Boltorn H-20, H-30 and H-40 polyol dendrimers and further tested as adsorbents for carbon dioxide (CO 2 ). Unmodified omega zeolite showed weak intrinsic affinity toward CO 2 , which was significantly improved by impregnation with polyol dendrimers, as supported by TPD measurements. This was explained in terms of both acidity attenuation via surface covering by the dendrimer layer and incorporation of amphoteric to slightly base-like OH groups belonging to the organic moiety. TPD and DSC measurements revealed that CO 2 is adsorbed via both physical and chemical interactions. CO 2 adsorption was found to strongly depend on the structure of both the inorganic support and organic moieties. However, The inorganic support was also found to contribute to CO 2 retention. The adsorbent effectiveness was discussed herein in terms of CO 2 retention capacity (CRC) and interaction strength. |
| Databáze: | OpenAIRE |
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