Produção de briquete a partir da adição da lignina kraft com resíduo da indústria moveleira

• Autor(a) principal: Gouvêa, Adriana de Fátima Gomes
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/582
• topic: Maralha; Painéis de madeira; Licor negro; Maralha; Wood paneling; Black liquor; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS

It is defined as waste from a forest-based industry, the leavings from the mechanical, physical or chemical processing in an industry of transformation that uses wood as the main raw material which are not included in the final product. The generation of waste has been significant in the forest sector causing environmental and economical problems. Its origin is derived from the immediate processing of solid wood into a forest product, such as wood panels, pulp, charcoal and furniture. The objective of this work was to study the technical and environmental feasibility to produce briquettes from industrial biomass shavings particles, panel particles and lignin extracted from black liquor in the kraft pulping process of eucalyptus. The kraft lignin from carbonation followed by acidification until pH2 showed lower yield (49 g ∕ L) compared to acidification process in pH2 (52,8 g ∕ L), but it showed advantages concerning the low content of sulfur (2,12%) when compared to acidification process (5,21%). The lignin obtained in this study for the production of briquettes presented low thermal resistance, possibly because of the drastic structural alteration undergone in the pulping and extracting processes, but showed excellent energy characteristics, such as high heating power (6000 kcal ∕ kg), low content of inorganic materials (0,49%) and low S ∕ G ratio (1,60). The wastes of the shavings particles, panels and kraft lignin have energy potential and were classified as Class II not dangerous. The production of briquettes with kraft lignin addition in adequate proportions and temperature showed advantages in the increase of mechanical resistance and durability. The production of briquettes with increased higher heating power in the proportions of 60% of kraft lignin addition was unviable due to the reduction of physical-mechanical quality of the briquettes, independent of temperature. Yet lignin addition presented advantages concerning the mechanical resistance of briquettes in temperatures of 75oC and 90oC with addition of 20% of lignin.