Pirólise do bagaço de cana-de-açúcar em reator de leito fixo: efeito de parâmetros de processo no rendimento e na qualidade do bio-óleo, do carvão e dos gases gerados

• Ano de defesa: 2016
• Autor(a) principal: Gonçalves, Edvan Vinícius
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual de Maringá; Brasil; Departamento de Engenharia Química; Programa de Pós-Graduação em Engenharia Química; UEM; Maringá, PR; Centro de Tecnologia
• Palavras-chave em Português: Pirólise; Bagaço de cana-de-açúcar; Biocarvão; Combustível; Bio-óleo; Hidrogênio; Líquido de pirólise; Resíduos orgânicos; Reator de leito fixo; Parâmetros de processo; Brasil.; Biochar; Fuel; Hydrogen; Pyrolysis Liquid; Organic waste; Brazil.; Engenharias; Engenharia Química
• Link de acesso: http://repositorio.uem.br:8080/jspui/handle/1/3795

Brazil is the world's greatest producer of sugarcane bagasse. This material has been shown to be viable source for use in pyrolytic processes. Thus, this study investigated the pyrolysis of sugarcane bagasse in a fixed bed reactor. The effects of process temperature, heating rate, nitrogen flow and particle size on the yield of pyrolysis products and their qualities were evaluated. The characterization of bagasse was very important for the development of the pyrolytic process. The thermal degradation of this material was complete only at temperatures above 400 0C. The factors that most influence the yield of pyrolysis products were temperature process and the particle size. The results revealed that the production of biochar decreased with increasing temperature, the generation of non-condensable gases have increased and the yield of bio-oil showed a parabolic profile with maximum expression occurring at 600 0C. The highest bio-oil yield (54%) occurred in the process conditions of 600 0C, 15 0C/min, 200 ml/min of N2 and particle size between 0.5 and 1.0 mm. The physical characteristics of this liquid show their suitability to most of the technical specifications reported in the literature for use in boilers and diesel engines. The chemical characterization of the bio-oil showed the presence of hydrocarbons, aldehydes, ketones, carboxylic acids, alcohols, ethers, esters, phenols, aromatic compounds and nitrogen compounds. The biochar produced proved unfeasible for use as adsorbent (due to its low specific area) and viable for use in burning processes. The characterization of non-condensable gases showed that CO2 gas was generated in the greatest amount (38.6 mL/g of bagasse), followed by H2 and CO (syngas) which showed very similar results (28,93 and 30,14 mL/g of bagasse). The results of the temperature variable influence on yield, quality and prices of the pyrolysis liquid and of the biochar allowed outlining revenue models of functions generated by the products. It was indicated that 526 0C is the best process temperature option.