2024-03-28T18:33:36Zhttps://gredos.usal.es/oai/requestoai:gredos.usal.es:10366/1398182022-02-07T15:39:31Zcom_10366_138521com_10366_4512com_10366_3823col_10366_138522
Grossmann, Ignacio
Galán, Guillermo
Martín Martín, Mariano
2019-09-02T09:15:37Z
2019-09-02T09:15:37Z
2019
Galán, G., Martín, M., Grossmann, I.E. (2019). Integrated Renewable production of ETBE from Switchgrass. ACS Sust. Chem Eng. 10.1021/acssuschemeng.9b01004
2168-0485
http://hdl.handle.net/10366/139818
[EN]In this work, we propose the optimization of a flowsheet for the conceptual design of an integrated renewable
production of ETBE from ethanol and i-butene from switchgrass. A superstructure embedding a number of alternatives is
proposed. Two technologies are considered for switchgrass pretreatment, dilute acid and a novel ammonia fiber explosion
(AFEX), so that the structure of the grass is broken down. Only glucose is fermented to produce i-butene, while xylose is
fermented to ethanol. Ethanol is purified using a multieffect column followed by molecular sieves and a PSA-membrane system
is used to upgrade the i-butene. The problem is formulated as an MINLP, and solved for each pretreatment as an NLP. Finally,
an economic evaluation is performed including a sensitivity analysis. Biomass composition determines the byproduct obtained.
Dilute acid is the selected pretreatment due to the largest yield to sugars and the possibility of adjusting the production of both
i-butene and ethanol for the needs to ETBE. For a facility that produces 90 kt/yr of ETBE, the investment adds up to 160 M€
for a production cost of 0.61€/kg, which is above market price. Even though the results look promising, further experimental
and scale up studies are required for validation.
eng
info:eu-repo/semantics/openAccess
Energy
Biofuels
i-Butene
Mathematical optimization
Ethanol
Switchgrass
Integrated Renewable Production of ETBE from Switchgrass
info:eu-repo/semantics/article