Hydrous bioethanol production from sugarcane bagasse via energy self-sufficient gasification-fermentation hybrid route

Simulation and financial analysis

Journal Article (2017)
Authors

Elisa M. de Medeiros (University of Campinas)

J. A. Posada-Duque (TU Delft - BT/Biotechnology and Society)

Henk J. Noorman (DSM, TU Delft - BT/Bioprocess Engineering)

P. Osseweijer (TU Delft - BT/Biotechnology and Society)

Rubens Maciel Maciel Filho (University of Campinas)

Research Group
BT/Biotechnology and Society
To reference this document use:
https://doi.org/10.1016/j.jclepro.2017.01.165
More Info
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Publication Year
2017
Language
English
Research Group
BT/Biotechnology and Society
Volume number
168
Pages (from-to)
1625-1635
DOI:
https://doi.org/10.1016/j.jclepro.2017.01.165

Abstract

Production of second generation ethanol can be accomplished with biomass gasification followed by syngas fermentation using acetogenic bacteria in a hybrid process. Using process simulation and financial analysis, this study evaluated the feasibility of producing hydrous ethanol from sugarcane bagasse in a conceptual hybrid plant designed to be energetically self-sufficient. The process was found to be competitive with other second generation routes, achieving an ethanol yield of 330 L per metric ton of dry biomass and an overall carbon conversion of 30%. The minimum ethanol selling price to achieve Net Present Value break-even with 10% Internal Rate of Return was estimated to be 706 US$/m3 after taxes in the base model. When accounting for uncertainties in the fixed capital investment and the cost of raw materials, the Net Present Value was found to be non-negative in 80% of the cases for a selling price of 783 US$/m3.

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