SIMULAÇÃO E AVALIAÇÃO DO PRÉ-TRATAMENTO DO BAGAÇO DA CANA-DE-AÇÚCAR COM ÁCIDO DILUÍDO PARA PRODUÇÃO DE ETANOL DE SEGUNDA GERAÇÃO

Abstract

This research was developed with the aim of testing the feasibility of the acid pretreatment stage of sugar cane bagasse for the production of second generation ethanol. The growing dependence of the national and international energy system on fossil fuels was addressed, as well as the depletion of reserves and negative environmental impacts, such as global warming. Considering that ethanol has become an interesting biofuel alternative and has been produced in several countries from a variety of raw materials, the present work intended to develop modeling, simulation and evaluation of the pre-treatment stage of ethanol. sugarcane bagasse with diluted acid for the production of second generation ethanol using an industrial process modeling and simulation tool. For bagasse pre-treatment, four cases were defined with different scenarios and, for each case, four time and temperature relationships for acid pre-treatment, these being: case 1 - 120 min and 100°C, case 2 - 90 min and 110°C, case 3 - 30 min and 120°C, case 4 - 30 min and 130°C. Case 3 was the most appropriate and with the best results that made the process viable, as it obtained conversion of Xylose and Glucose, low formation of furfural and hydroxymethylfurfural, therefore making pre-treatment viable and not disturbing the following stages of ethanol production, in addition to was chosen because it uses less energy within the process, thus improving the acceptance of the process in the industry.