Preparation and characterization of activated carbon from a new raw lignocellulosic material: Flamboyant (Delonix regia) pods |
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Authors: | Alexandro MM Vargas André L Cazetta Clarice A Garcia Juliana CG Moraes Eurica M Nogami Ervim Lenzi Willian F Costa Vitor C Almeida |
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Institution: | 1. Department of Chemistry, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900 – Maringá, Paraná, Brazil;2. Department of Chemical Engineering, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900 – Maringá, Paraná, Brazil |
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Abstract: | 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 N2 adsorption isotherms. The activated carbons obtained were essentially microporous and had BET surface area ranging from 303 to 2463 m2 g−1.13C (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. |
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Keywords: | Activated carbon Flamboyant pods Microporosity Chemical activation NaOH |
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