Evaluation of the performance of the preteretment with the hydrogen peroxide on sugar cane bagasse for removing lignin

Abstract

Bioethanol production provides environmental, economic and social benefits, reduces dependency and preserves fossil energy sources. This investigation evaluated the performance of oxidative chemical pretreatment with hydrogen peroxide (H2O2), to increase the availability of cellulose, from mixtures of lignocellulosic biomasses such as bagasse from panelero cane, and litter, in proportion (90:10), carried out in order to evaluate the behavior of the biomasses when they are mixed, maintaining a greater proportion of sugarcane bagasse. Three variables were evaluated (time, temperature, and concentration) using an experimental design 23 with triplicate in the central point, a lignin removal of 70% was achieved with reaction conditions at 60 min, 45 ° C, 5% peroxide hydrogen. The results obtained in the pretreatment stage show a good removal performance of insoluble lignin of 88.5% with effect conditions at 80 min, 25 ° C, 7% hydrogen peroxide and a yield of 79.5% removal under conditions at 40 min, 25 ° C, 3% hydrogen peroxide. For soluble lignin with 58.8% removal and conditions at 80 min, 25 ° C, 7% hydrogen peroxide, and a reagent yield of 61.67% at 40 min conditions, 25 ° C 7% hydrogen peroxide. The experimental design shows by means of a statistical analysis the conditions of the process to reduce costs and time, identifying from the significant variables of the model that time, temperature and interaction 1 * 3 that corresponds to time and concentration, with 95% confidence, will bring the surfaces and respond to see the trend of these interactions.