New sugarcane biorefinery routes considering the integral use of biomass have become more important to the strategic objectives of the bioenergy production expansion in Brazil. Among these new products that may be aggregated to the sugarcane biorefinery one could highlight the butanol, because, as well as the butanol produced by petrochemical routes, it has its use established as solvent in many chemical processes and has liquid fuel potential for transportation. If compared to ethanol, butanol presents some important advantages such as higher energy content value; it may be used to directly replace gasoline with no need to change the vehicles or the supply systems; may be mixed with gasoline in higher proportions than ethanol's; or may be used as an additive to ethanol. In view of its physic-chemical characteristics, its fuel and chemical product potential, and the green route production possibility (from biomass), it becomes interesting and necessary to assess the viability of the production of biobutanol in a sugarcane refinery. In this project, the alcohol chemical and sugar chemical routes for the production of biobutanol from sugarcane will be evaluated considering various arrangements for the integration of this process in the existing sugarcane biorefineries. Technical-economical viability indicators will be assessed and environmental impacts will be calculated by the Life Cycle Assessment (LCA) methodology. The Ecological Footprint and the Emergy Evaluation will be also applied using the LCA approach in order to implement a multi-criteria evaluation of the environmental performance. The results obtained in this project will allow identifying the critical economical and environmental impacts of each step of the productive process, with respect to the different biobutanol production routes.
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