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Type: Artigo de periódico
Title: Comparative analysis for power generation and ethanol production from sugarcane residual biomass in Brazil
Author: Seabra, JEA
Macedo, IC
Abstract: This work compares the technical, economic and environmental (GHG emissions mitigation) performance of power generation and ethanol production from sugarcane residual biomass, considering conversion plants adjacent to a sugarcane mill in Brazil. Systems performances were simulated for a projected enzymatic saccharification co-fermentation plant (Ethanol option) and for a commercial steam-Rankine power plant (Electricity option). Surplus bagasse from the mill would be used as fuel/raw material for conversion, while cane trash collected from the field would be used as supplementary fuel at the mill. For the Electricity option, the sugarcane biorefinery (mill + adjacent plant) would produce 91 L of ethanol per tonne of cane and export 130 kWh/t of cane, while for the Ethanol option the total ethanol production would be 124 L/t of cane with an electricity surplus of 50 kWh/t cane. The return on investment (ROI) related to the biochemical conversion route was 15.9%, compared with 23.2% for the power plant, for the conditions in Brazil. Considering the GHG emissions mitigation, the environmentally preferred option is the biochemical conversion route: the net avoided emissions associated to the adjacent plants are estimated to be 493 and 781 kgCO(2)eq/t of dry bagasse for the Electricity and Ethanol options, respectively. (C) 2010 Elsevier Ltd. All rights reserved.
Subject: Cellulosic ethanol
Country: Inglaterra
Editor: Elsevier Sci Ltd
Citation: Energy Policy. Elsevier Sci Ltd, v. 39, n. 1, n. 421, n. 428, 2011.
Rights: fechado
Identifier DOI: 10.1016/j.enpol.2010.10.019
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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