Avaliação da palha de carnaúba In natura e carbonizada para produção de combustíveis sólidos: análise imediata, poder calorífico e densificação da biomassa.

• Autor(a) principal: Bizerra, Deiby Anne Uchoa Barroso
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/45496
• topic: Biomassa; Análise imediata; Poder calorífico superior; Energia

The biomass use as a solid fuel from the carnauba straw has presented a promising potential in the state of Ceará, being this region highlighted in the extractivism of the carnauba (Copernicia prunifera). This scientifical article aimed to characterize the residual biomass from the carnauba culture, more specifically, carnauba straw both in natura and carbonized. The characterization of the residue was due to the immediate analysis and the High Calorific Power (HCP), which were governed, respectively, by Brazilian standards ABNT NBR 8112 and 8633. The methodology was based on drying the raw biomass in natura in a greenhouse at 105ºC and then burning it in a muffle oven at different temperatures, 250 ºC, 300 ºC, 350 ºC e 400 ºC. This procedure was also used to characterize the carbonized biomass, however, before the start of the process, the biomass in natura was carbonized in a muffle furnace at temperatures of 250 °C, 300 °C, 350 °C and 400 °C. By the analyzes it was noticed that the straw of the carnauba in natura presented 11,10% of moisture content; 75,77 % of volatile content; 9,76 % of ash content; 14,17 % of fixed carbon content and HCP of 17,26 MJ/kg. After the carbonization, the carnauba straw at 250 °C presented 2,38 % of moisture content; 49,27 % of volatile content; 17,27 % of ash content; 31,10 % of fixed carbon content and HCP of 18,74 MJ/kg. For the temperature of 300 ºC the results were better than the others: 4,54 % of moisture content; 44,05 % of volatile content; 15,73 % of ash content; 35,68 % of fixed carbon content and HCP of 20,69 MJ/kg. Considering the temperature of 350 ºC, it was obtained: 7,75 % of moisture content; 37,69 % of volatile content; 19,85 % of ash content; 34,72 % of fixed carbon content and HCP of 17,62 MJ/kg. And at 400 ºC it presented: 6,77 % of moisture content; 33,00 % of volatile content; 27,10 % of ash content; 33,13 % of fixed carbon content and HCP of 15,60 MJ / kg. Therefore, it was observed that, according to the initial state of the biomass (in natura or carbonized), different results are possible, being necessary its adequacy to the degree of efficiency that is desired, that is, the amount of energy generated.