INFLUENCE IN CHEMICAL AND PHYSICAL PRE-TREATMENT WITH CELLULOSE AND LIGNIN FRACTIONS OF DIFFERENT BIOMASSES AND THEIR CAPACITY FOR SECOND GENERATION ETHANOL PRODUCTION
Keywords:
Lignin-cellulose biomass, Cellulose and lignin, Pre-treatment.
Abstract
The development of lignin-cellulose ethanol, derived from residual biomass, has been underscored in research on energy. Current assay comprised sugarcane bagasse, elephant grass and sawdust (red angelim) to evaluate cellulose and lignin rates prior to and after being submitted to a set of physical and chemical pre-treatments (acid and alkaline). The assay shows whether the application of pre-treatments is favorable towards the enzyme hydrolysis process for the generation of fermentable sugars and for the posterior process of microbial fermentation to obtain lignin-cellulose ethanol. Results reveal that the combination of pre-treatments was better in de-lignification which is one of the impairments for the generation of lignin-cellulose ethanol. Lignin rates for sugarcane were reduced by 46.53% after pre-treatment; in the case of sawdust, reduction reached 28.45%; in the case of elephant grass, the best result was obtained with 62.16% decrease. Results on cellulose rates varied with regard to biomass: in the case of sugarcane, there was greater availability of cellulose with a 12.21% increase; in the case of the other two biomasses, pre-treatment caused a loss of available cellulose, with an 8% decrease for elephant grass and 18.62% for sawdust.
Published
2018-09-27
Section
Tecnologias Limpas
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