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- W2535359597 abstract "A torrefação, também conhecida como pré-carbonização, é um tratamento térmico, em baixas temperaturas (200 a 300 ºC), aplicado a um material lignocelulósico com o objetivo de melhorar suas propriedades energéticas. Desenvolveu-se este estudo visando avaliar o efeito da temperatura de torrefação nas propriedades de cavacos de eucalipto. Utilizando uma mufla, os cavacos de eucalipto foram submetidos a quatro tratamentos térmicos com temperaturas de 150, 200, 250 e 300 ºC. Os cavacos de madeira permaneceram nestes patamares de temperatura por dez minutos. Foram realizadas análises físicas e químicas dos cavacos torrificados e in natura. Os resultados foram submetidos à análise de variância (ANOVA) e quando estabelecidas diferenças significativas entre eles, aplicou-se o teste Tukey, a 95% de significância. Com o aumento da temperatura de torrefação observou-se maior concentração de lignina e de carbono fixo, menor umidade de equilíbrio higroscópico, maior poder calorífico superior, menor teor de materiais voláteis e menor rendimento gravimétrico. Recomenda-se a torrefação em temperatura de 250ºC, visto que os cavacos torrificados nesta condição apresentaram melhor desempenho, com densidade energética de 4004 MJ/m³." @default.
- W2535359597 created "2016-10-28" @default.
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- W2535359597 date "2016-09-30" @default.
- W2535359597 modified "2023-10-06" @default.
- W2535359597 title "Torrefação de cavacos de eucalipto para fins energéticos" @default.
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- W2535359597 doi "https://doi.org/10.4336/2016.pfb.36.87.1093" @default.
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