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Title: Preparação e caracterização de carvão ativado quimicamente a partir da casca de arroz
metadata.dcterms.alternative: Preparation and characterization of chemically activated carbon from rice hulls
metadata.dcterms.creator: Schettino Junior, Miguel Angelo
Freitas, Jair Carlos Checon de
Cunha, Alfredo G.
Emmerich, Francisco Guilherme
Soares, Ana B.
Silva, Paulo R. N.
metadata.dcterms.subject: Carbono ativado;Casca de arroz;Activated carbons;Rice hulls;Chemical activation
metadata.dcterms.issued: 2007
metadata.dcterms.abstract: 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.
ISSN: 0100-4042
Appears in Collections:DFIS - Artigos publicados em periódicos

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