Abstract
Lignocellulosic ethanol is a promising alternative to replace liquid fossil fuels for the transportation sector in the near future. Organosolv pretreatment has been tested as a method for separating lignin from the biomass and commercializing it as a biopolymer. Based on published laboratory scale data, we propose a feasible process flowsheet for organosolv pretreatment. Simulation of the pretreatment process provided mass and energy balances for a techno-economic analysis, and the values were compared with the most prevalent and mature pretreatment method: diluted acid. Organosolv pretreatment required more energy, 578.1 versus 213.8 MW for diluted acid pretreatment, but resulted in a higher ethanol concentration after the biomass fermentation, 11.1% compared to 5.4%. Total annual costs (TACs) calculations showed advantages for diluted acid pretreatment, but future improvements explored in the sensitivity analysis turned into possible savings of 42.8% in the minimum ethanol selling price for organosolv pretreatment.
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Acknowledgements
André Rodrigues Gurgel da Silva thanks the National Council for Scientific and Technological Development—Brazil (CNPq) for the Ph.D. scholarship for this study.
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Rodrigues Gurgel da Silva, A., Errico, M. & Rong, BG. Techno-economic analysis of organosolv pretreatment process from lignocellulosic biomass. Clean Techn Environ Policy 20, 1401–1412 (2018). https://doi.org/10.1007/s10098-017-1389-y
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DOI: https://doi.org/10.1007/s10098-017-1389-y