Estudio de la cinética de la hidrólisis ácida de bagazo de caña de azúcar sin pretratamiento para la obtención de azúcares reductores

The acid hydrolysis of the lignocelluloses materials has been the technology more used for obtaining reducing sugar (fermentable), that later are turned to bioethanol. In this work is realized on laboratory scale the process of reducing sugar production by means of acid hydrolysis of the cane bagasse, without pre-cure, using sulfuric acid diluted in conditions of boiling to ebb tide and to atmospheric pressure in order for reaching a high conversion of the bagasse to reducing sugars. In the study, the influence of three independent variables is analyzed: reaction time, temperature on the process and concentration of sulfuric acid. The quantitative reducing sugar determination is realized by UV-Vis spectrophotometry by the method of acid 3.5 dinitrosalisilic (DNS), using glucose as standard. Also, is developed a kinetic model to find the best conditions of hydrolysis, based on two consecutive reactions of pseudo first order for the average scarification. The obtained model allows describing the process of reducing sugar production from the bagasse cane without pre-cure using H2SO4.