Preparation and characterization of activated carbon from a new raw lignocellulosic material: flamboyant (Delonix regia) pods.
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.
Vargas
Alexandro M M
AM
Department of Chemistry, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900 - Maringá, Paraná, Brazil.
Cazetta
André L
AL
Garcia
Clarice A
CA
Moraes
Juliana C G
JC
Nogami
Eurica M
EM
Lenzi
Ervim
E
Costa
Willian F
WF
Almeida
Vitor C
VC
D002244:Carbon / Q000737:chemistry*; D007887:Fabaceae / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry; D016062:Porosity; D012639:Seeds; D013696:Temperature
C036909:lignocellulose; D002244:Carbon; D008031:Lignin