Comparative Analysis of Corn Stover Components and Non-Conventional Biomass Feedstocks with Dilute and Concentrated Acid Hydrolysis

摘要

The evaluation of the corn stover components and non-convetional biomass feedstocks (sugarcane bagasse, mango skin, mango bagasse and pine wood) was developed using dilute and concentrated acid hydrolysis and pretreatment to maximize the production of sugars such as hydrolysis alkaline with sodium hydroxide, or immersion in water at 120 °C. Diluted hydrolysates were carried out with retention times of hydrolysis (0-300 min), acid concentration (1-5 wt%), agitation speed of 250 rpm and constant temperature of 100 ° C in a heating system under reflux. Furthermore, concentrated hydrolysates were examined which were carried out with retention times of hydrolysis (0-90min), concentration of solids (2-10 wt%) and different temperatures (30-70 ° C) using a concentration of 70% sulfuric acid. The results show the ability of both the dilute acid and concentrated acid to convert cellulose into glucose for subsequent fermentation to ethanol. The material that obtained the maximum production of total reducing sugars was mango bagasse with 263.58 gL-1 using dilute acid hydrolysis with 2% by weight of acid and 240min, while for sugarcane bagasse its maximum was 75.17 gL-1 using alkaline hydrolysis pretreatment with calcium sulfate and dilute acid hydrolysis of 5% and 120min, the maximum of mango skin was 137.67 gL-1 using dilute acid hydrolysis at 2% and 30 min, for wood pine was 101.39 gL-1, using hot liquid water at 60min and 1% acid, while its maximum for corn stalks was using concentrated acid hydrolysis of 60.69gL-1 at 30°C, 10min and 10% solid feed concentration and finally using corn leaves was 31.36gL-1 using dilute acid hydrolysis with 2% by weight of acid and 30min.