RESUMOCarvões 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 CO 2 , 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 (titulação de Boehm), buroff, área superficial BET estimada, índice de iodo, cálculo de área superficial com azul de metileno S AM , testes de adsorção com azul de metileno e fenol e índice de resistência mecânica. Os resultados mostraram que, com o aumento da temperatura e do tempo de ativação, ocorre aumento da área superficial, do volume de poros, da basicidade do carvão e da capacidade de adsorção de azul de metileno e de fenol.Palavras-chave:Candeia; Carvão Ativado; Briquete.
ABSTRACTActivated carbons briquette shaped were prepared from Candeia wood waste, generated in the extraction of α-bisabololoil process. The material was briquetted, carbonized and activated with CO 2 , varying the temperature (700-900°C) and activation time (1-3 hours). The characterization of the activated carbons were performed by: elemental analysis (CHN-O), analysis of the functional groups (Boehm titration), Burn-off, estimated BET surface area, iodine index, calculation of surface area with methylene blue, adsorption tests with methylene blue (MB) and phenol and mechanical resistance (IRI).The results showed that increasing temperature and time of activation promoted an increased in the surface area, pore volume, basicity and adsorption capacity of AM and phenol.
Das (3)B1u ← (1)A1g‐Absorptionsspektrum von Benzol und Perdeuterobenzol bei 4,2°K wird zum ersten Mal bei hoher Auflösung mittels der Phosphoreszenz‐Photoanregungs‐Methode erhalten.
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