Production of granular activated carbons from sugar cane bagasse and molasses- DOI: 10.4025/actascitechnol.v28i1.1203

• Autor(a) principal: Gonçalves, Gilberto da Cunha
• Data de Publicação: 2008
• Outros Autores: Mendes, Elisabete Scolin, Pereira, Nehemias Curvelo, Sousa, José Carlos de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta scientiarum. Technology (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/1203
• topic: activated carbon; sugar cane bagasse; molasses; decolorization; carvão ativado; bagaço de cana-de-açúcar; melaço; descoloração; 3.06.00.00-6 Engenharia Química

Activated carbons were prepared from mixtures of sugar cane bagasse and molasses in bagasse:molasses mass ratios from 1:0 to 1:2. The mixture was pressed to form pellets, and pyrolyzed under N2 flow of 150 mL•min-1, at 850°C, for 1 hour. The pyrolyzed carbons were activated with CO2, under the flow of 75 mL•min-1 at 850°C for 30 min. The activated carbons were characterized by an analysis of nitrogen adsorption isotherms (77 K), pH, and solutions decolorization of sugar cane molasses (1% w/v). Results showed that the activated carbons presented yield of 23% in relation to the initial pellets, surface areas from 272 to 455 m2•g-1, and that micro and mesopores were predominant in the pore size distribution. Activated carbons made with a smaller amount of molasses in the mixture were as efficient in the decolorization as a commercial reference carbon