Preparação e caracterização de carvão ativado quimicamente a partir da casca de arroz


Autoria(s): Schettino Junior, Miguel Angelo; Freitas, Jair Carlos Checon de; Cunha, Alfredo G.; Emmerich, Francisco Guilherme; Soares, Ana B.; Silva, Paulo R. N.
Data(s)

10/02/2011

10/02/2011

2007

Resumo

This work consists in a study about the chemical activation of charred rice hulls using NaOH as the activation agent. The influence of the naturally-occurring silica was particularly evidenced. X-ray diffraction patterns showed the formation of sodium carbonate and silicates in the activated samples, whereas thermogravimetric curves revealed a strong reduction in the ash content of these samples after washing with water. Nitrogen adsorption data indicated a microporosity development only in the washed samples, with BET surface area values of 450 and 1380 m2/g achieved for the samples activated at 800 °C starting from the precursor with or without silica, respectively.

Identificador

SCHETTINO JR., Miguel A. et al. Preparação e caracterização de carvão ativado quimicamente a partir da casca de arroz. Quím. Nova, São Paulo, v. 30, n. 7, p. 1663-1668, 2007. Disponível em: <http://www.scielo.br/pdf/qn/v30n7/30.pdf>. Acesso em: 10 fev. 2011.

0100-4042

http://repositorio.ufes.br/handle/10/588

10.1590/S0100-40422007000700031

Idioma(s)

por

Direitos

open access

Palavras-Chave #Carbono ativado #Casca de arroz #Activated carbons #Rice hulls #Chemical activation
Tipo

article