Desenvolvimento e otimização de processos de produção de etanol de primeira e segunda geração e eletricidade a partir da cana-de-açúcar / Development and optimization of first and second generation bioethanol and electricity production processes from sugarcane

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

07/10/2011

RESUMO

Increase on biofuels demand has motivated the production of bioethanol from lignocellulosic materials (2nd generation ethanol). Bioethanol has been produced in large scale in Brazil from sugarcane (1st generation ethanol) for more than 30 years. Large amounts of lignocellulosic materials (bagasse and trash) are generated during sugarcane processing; bagasse is burnt for production of energy, while trash is burnt in the field to improve the harvest or left in the field. The best conditions for insertion of 2nd generation ethanol production in Brazil using sugarcane lignocellulosic fractions as feedstock were investigated in this study, leading to an increase on ethanol production using the same cultivated area and part of the infrastructure already available at the conventional process. In this way, technologies for maximization of ethanol production from sugarcane, including those that decrease energy consumption of the conventional ethanol production process were evaluated. In addition, different technologies for production of 2nd generation ethanol were compared, including different pretreatment methods and conditions for enzymatic hydrolysis. Simulations were developed to compare these technologies; results show that optimization of the energy demand of the conventional ethanol production process and use of part of the trash in the industry are crucial in order to increase ethanol production from sugarcane; solids content of hydrolysis reactions presents an important impact on overall ethanol production; signi_cant gains can be obtained when 2nd generation ethanol and electricity production are integrated in an autonomous distillery

ASSUNTO(S)

bagaço de cana lingocelulose simulation processes ethanol sugarcane bagasse lignocellulose etanol cana-de-açúcar simulação de processos

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