کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
995965 | 936280 | 2011 | 8 صفحه PDF | دانلود رایگان |
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 kgCO2eq/t of dry bagasse for the Electricity and Ethanol options, respectively.
Research Highlights
► Power generation would present better profitability than ethanol production from sugarcane residues in Brazil, in the reference scenario adopted here.
► The Ethanol option would be able to mitigate more GHG emissions in Brazil.
► The economics for the ethanol production technology are more likely to improve in the future.
Journal: Energy Policy - Volume 39, Issue 1, January 2011, Pages 421–428