Preparation and characterization of activated carbon from a new raw lignocellulosic material: Flamboyant (Delonix regia) pods
| Autor: | Juliana C.G. Moraes, Alexandro M.M. Vargas, Clarice A. Garcia, Vitor C. Almeida, Ervim Lenzi, Willian Ferreira da Costa, André L. Cazetta, Eurica M. Nogami |
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| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
biology Chemistry Temperature Infrared spectroscopy Fabaceae General Medicine Microporous material Management Monitoring Policy and Law biology.organism_classification Lignin Carbon Thermogravimetry Adsorption Seeds medicine Organic chemistry Char Porosity Waste Management and Disposal Delonix regia Activated carbon medicine.drug BET theory Nuclear chemistry |
| Zdroj: | Journal of Environmental Management. 92:178-184 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2010.09.013 |
| Popis: | Activated carbons were prepared from flamboyant pods by NaOH activation at three different NaOH:char ratios: 1:1 (AC-1), 2:1 (AC-2), and 3:1 (AC-3). The properties of these carbons, including BET surface area, pore volume, pore size distribution, and pore diameter, were characterized from N(2) adsorption isotherms. The activated carbons obtained were essentially microporous and had BET surface area ranging from 303 to 2463 m(2) g(-1).(13)C (CP/MAS and MAS) solid-state NMR shows that the lignocellulosic structures were completely transformed into a polycyclic material after activation process, thermogravimetry shows a high thermal resistance, Boehm titration and Fourier-transform infrared spectroscopy allowed characterizing the presence of functional groups on the surface of activated carbons. Scanning electron microscopy images showed a high pore development. The experimental results indicated the potential use of flamboyant pods as a precursor material in the preparation of activated carbon. |
| Databáze: | OpenAIRE |
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