Organosolv delignification of sugarcane bagasse combined with physical and mechanical processes View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2010-2014

FUNDING AMOUNT

N/A

ABSTRACT

The production of biofuels from plant raw materials can be performed by different technological routes. Currently, bioethanol presents highlighted among the alternatives for the production of liquid biofuels and requires the use of agricultural waste containing significant amounts of polysaccharides as an input for its production (eg, bagasse sugarcane). Therefore, it is necessary that the organizational structure of lignocellulose present in these materials is subject to a process of pre-treatment for the effective separation (selectively and efficiently) of its major constituents (cellulose, lignin and hemicellulose). To obtain the ethanol from the cellulosic fraction bottlenecks and hemicellulose residual lignin content and cellulose crystallinity and may limit the efficiency of enzymatic hydrolysis step and fermentation. Within this context, kinetic studies in the pretreatment step are extremely important to quantify the acceptable residual contents of hemicelluloses and lignin in the pulps obtained. Aiming to apply the advantages presented by the organosolv process, this project proposes two comparative routes: kinetic studies for the removal of hemicellulose fraction (hydrothermal process) followed by kinetic study of organosolv delignification and kinetic study of delignification organosolv without the prior hydrothermal step. Both routes will be performed with the use of microwave digestion system for the pretreatment of sugarcane bagasse fibers. The proposed system can improve the removal of lignin and hemicellulose efficiency in shorter times as compared to conventional extraction processes. After pretreatment, the pulps are subjected to physical-mechanical treatments (return fines, grinding and atmospheric plasmas) with the aim of reducing the crystallinity of cellulose and improve access for the enzymatic hydrolysis. The success of the treatment will be evaluated by a standard protocol of enzymatic hydrolysis and other acid hydrolysis. (AU) More... »

URL

http://www.bv.fapesp.br/pt/auxilios/24310/deslignificacao-organossolve-de-bagaco-de-cana-de-acucar-combinada-com-processos-fisico-mecanicos/

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