Different Approaches for the Development of Low-Cost CO2 Adsorbents
| Autor: | Marta G. Plaza, Benito Arias, Covadonga Pevida, M. D. Casal, Fernando Rubiera, J. J. Pis, Claudia Martin, J. Fermoso |
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| Rok vydání: | 2009 |
| Předmět: |
Thermogravimetric analysis
Environmental Engineering Chromatography Chemistry Chemical modification chemistry.chemical_element Nitrogen Thermogravimetry Adsorption Chemical engineering Environmental Chemistry Surface modification Surface chemistry-modification Carbon dioxide capture Inert gas Waste management Carbon General Environmental Science Civil and Structural Engineering |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1943-7870 0733-9372 |
| DOI: | 10.1061/(asce)ee.1943-7870.0000009 |
| Popis: | Different carbon materials were tested as precursors for the production of CO2 adsorbents. The chemical modification of the surface of the prepared adsorbents was studied by means of three different approaches: impregnation with amines, electrophilic aromatic substitution and heat treatment in the presence of ammonia. The samples were chemically characterized and the porous texture was evaluated from the N2 adsorption isotherms at -196 ºC. The CO2 adsorption capacities of the adsorbents at 25 and 100 ºC were evaluated in a thermogravimetric analyzer. In general, the incorporation of basic nitrogen functionalities enhanced the CO2 capture capacities of the modified carbons but this increase depended on the textural properties of the support and the surface modification methodology. CO2 adsorption capacities of up to 111 mg CO2/ g at room temperature were attained. All the tested samples were completely regenerated when subjected to heat treatment at 100 ºC under inert atmosphere. This work was carried out with financial support from the Spanish MEC (Project CTM2005-03075/TECNO). M.G.P., C.F.M. and J.F. acknowledge funding from the CSIC I3P Program co-financed by the European Social Fund, CSIC JAE Program and Plan Regional de Investigación del Principado de Asturias, respectively. |
| Databáze: | OpenAIRE |
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