Enhanced biomass processing towards acetone-butanol-ethanol fermentation using a ternary deep eutectic solvent

Helena Poy, André M. da Costa Lopes, Estela Lladosa, Carmen Gabaldón, Sonia Loras and Armando J.D. Silvestre

Renewable Energy, 2023, vol. 219, issue P2

Abstract: This work evaluated the effectiveness of ternary deep eutectic solvents (DES) composed of cholinium chloride (ChCl), lactic acid (LA) and a diol (ethylene glycol – EG, or 1,6-hexanediol – HEX) in the pretreatment of rice straw (RS) towards the production of biobutanol. The most promising results were obtained with ChCl:LA:EG 1:5:5 at 120 °C for 4 h, which enabled the highest conversion of biomass polysaccharides into glucose and xylose up to 89.3 % and 53.6 % yields, respectively. Subsequently, the produced sugars were efficiently converted into biobutanol through the acetone-butanol-ethanol (ABE) fermentation process, resulting in the production of 95.7 g butanol/kg RS as one of the highest values reported in literature. Thus, the application of the ternary DES ChCl:LA:EG 1:5:5 represents a competitive and environmentally friendly pathway for RS valorization in comparison to conventional processes.

Keywords: Rice straw; Pretreatment; Saccharification; Biobutanol production; Ternary deep eutectic solvents (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:219:y:2023:i:p2:s0960148123014039

DOI: 10.1016/j.renene.2023.119488

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