7 documents found, page 1 of 1
Activated carbon from bamboo (Bambusa vulgaris) waste using CO2 as activating a...
Santana,Gregório Mateus; Trugilho,Paulo Fernando; Borges,Willian Miguel da Silva; Bianchi,Maria Lucia; Paes,Juarez Benigno; Nobre,João Rodrigo CoimbraAbstract Bamboo (Bambusa vulgaris) wastes were used as raw material for producing activated carbon. The materials were collected and turned into activated carbons by carbonization (500 °C, 1.67 °C.min-1, 60 min) and activation (800 °C, 10 °C.min-1, 60 min) processes with CO2 (100 mL.min-1). The obtained material (CO2 AC) was characterized by its yield, elemental analysis, ash content, surface area (SBET), Boehm...
Anatomical Differences Between the Wood of Three Species Commercialized as “Fre...
Nobre,João Rodrigo Coimbra; Melo,Luiz Eduardo de Lima; Figueiredo,Marcio Franck de; Couto,Allan Motta; Gomes,Joaquim IvanirABSTRACT This study aims to bring forward helpful anatomical characteristics to assist in the identification of Cordia goeldiana Huber, Cordia bicolor A.DC. and Cordia alliodora (Ruiz & Pav.) Cham., all of them commercialized by the popular name of “freijó” in the Amazon region. The anatomical study of the woods followed the orientations of the International Association of Wood Anatomists - IAWA Committee. The ...
Elementary, Chemical and Energy Characteristics of Brazil Nuts Waste (Bertholle...
Leandro,Renata Ingrid Machado; Abreu,Jesomi Jonatan da Costa; Martins,Cleibiane da Silva; Santos,Iêdo Souza; Bianchi,Maria LuciaABSTRACT This study aimed to determine the chemical and energetic composition of Brazil nut waste in the city of Castanhal-PA. Some of the material was crushed, sifted and stored for acclimatization and analysis. Molecular and immediate chemical analyses were performed on the raw material according to NBR standards. Another part was charred in Muffle furnace, with heating rate of 1.67 °C.min-1 and temperature o...
Elementary, Chemical and Energy Characterization of “Dendê” (Elaeis guineensis ...
Abreu,Jesomi Jonatan da Costa; Martins,Cleibiane da Silva; Pereira,Paulo Cezar Gomes; Bianchi,Maria Lucia; Nobre,João Rodrigo CoimbraABSTRACT This work aimed to chemically and energetically characterize palm waste in the municipality of Igarapé Açú-PA. The residue was crushed, sieved and acclimated up to 12% of humidity. Chemical analyses were performed in the fresh material, according to NBR standards. Part of the residue was transformed into charcoal at 450 °C, with heating rate of 1.67 °C.min-1 and residence time of 30 minutes. Elementary...
EFFECT OF EXTRACTIVES AND CARBONIZATION TEMPERATURE ON ENERGY CHARACTERISTICS O...
Moulin,Jordão Cabral; Nobre,João Rodrigo Coimbra; Castro,Jonnys Paz; Trugilho,Paulo Fernando; Arantes,Marina Donária ChavesABSTRACT The objective of this study was to evaluate the effect of extractives soluble in hot water, besides final carbonization temperatures, on the gravimetric yield and properties of charcoal for waste of three native forest species from the Amazon region. Waste cuttings of Ipé, Grapia and Maçaranduba species, from the machine processing for joinery of a company in the State of Pará, were used. Carbonization...
Produção, caracterização e avaliação da capacidade adsortiva de carvões ativado...
Borges,Willian Miguel da Silva; Arantes,Ana Carolina Cunha; Castro,Guilherme Mello Mattos de; Bianchi,Maria Lucia; Nobre,João Rodrigo CoimbraRESUMO Carvões ativados em forma de briquetes foram preparados a partir do resíduo da madeira de candeia, gerado no processo de extração do óleo α-bisabolol. O material foi briquetado, carbonizado e ativado com CO2,variando-se a temperatura (700-900°C) e o tempo de ativação (1-3 horas). Para a caracterização dos carvões ativados foram realizadas análise elementar (CHN-O), análise dos grupos funcionais (titulaçã...
Química e colorimetria da madeira de Eucalyptus grandis W. Mill ex Maiden termo...
Zanuncio,Antônio José Vinha; Nobre,João Rodrigo Coimbra; Motta,Javan Pereira; Trugilho,Paulo FernandoA termorretificação visa melhorar as características para agregar valor à madeira através da aplicação de calor. O objetivo foi avaliar as alterações químicas e colorimétricas da madeira termorretificada de Eucalyptus grandis submetida a 170, 200 e 230 ºC por 3, 5 e 7 h. Os teores de extrativos, lignina, holocelulose, composição elementar e os parâmetros colorimétricos foram determinados. Os teores de extrativo...