Analise técnica, econômica e ecológica da incorporação de sistemas de gaseificação de bagaço de cana-de-açúcar no setor sucroalcooleiro: uso de ciclos combinados para o aumento da oferta de eletricidade

• Ano de defesa: 2015
• Autor(a) principal: Machin, Einara Blanco [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Bagaço de cana; Gaseificação de biomassa; Turbinas a gas; Energia elétrica - Produção; Energia - Conversão; Biomass gasification
• Link de acesso: http://hdl.handle.net/11449/124515; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/10-06-2015/000832562.pdf

The significantly elevated levels of byproducts (bagasse and trash) currently available in the sugar cane industries offer an attractive potential for the use of the BIG - GTCC in the sugar industry. This work aims to make an energetic, economic and ecological studies of the BIG -GTCC (Biomass Integrated Gasifier - Gas Turbine Combined Cycle) system incorporation in the sugar cane industry, as an alternative to increase the levels of electricity generation in this sector. A new technology for the bagasse pre-treatment is proposed in order to overcome the technical problems observed during the continuous feeding of gasifier with sugarcane bagasse as a setting for coupling the gasifier with the sugarcane mill. An energetic analysis of the proposed system was performed. The study also identified the production cost of the synthesis gas, as well as allocated the electricity, heat, and mechanical energy production cost in the proposed system, considering the three studied cases. In the final phase, the pollutant emissions, the carbon dioxide equivalent, the pollution indicator, and the ecological efficiency of the incorporation of the cogeneration process with combined cycle in the traditional Brazilian sugar industries were determined. The main result of the study was that the application of the configuration, where only the surplus bagasse of the conventional plant is gasified in an entrained flow reactor, after pretreatment of the bagasse through a torrefaction process, appears to be economically, ecologically, and technically the best of the proposed options