Journal
ChemSusChem
Volume 8, Issue 8, Pages 1317-1322Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201403418
Keywords
biomass; biorefinery; catalysis; sugars; valerolactone
Funding
- Great Lakes Bioenergy Research Center by U.S. Department of Energy [DE-FC02-07ER64494]
- National Science Foundation [CBET-1149678]
- Swiss National Science Foundation
- NSF graduate research fellowship
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1149678] Funding Source: National Science Foundation
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We recently reported a nonenzymatic biomass deconstruction process for producing carbohydrates using homogeneous mixtures of -valerolactone (GVL) and water as a solvent. A key step in this process is the separation of the GVL from the aqueous phase, enabling GVL recycling and the production of a concentrated aqueous carbohydrate solution. In this study, we demonstrate that phenolic solventssec-butylphenol, nonylphenol, and lignin-derived propyl guaiacolare effective at separating GVL from the aqueous phase using only small amounts of solvent (0.5g per g of the original water, GVL, and sugar hydrolysate). Furthermore, using nonylphenol, we produced a hydrolysate that supported robust growth and high yields of ethanol (0.49g EtOH per g glucose) at an industrially relevant concentration (50.8gL(-1) EtOH). These results suggest that using phenolic solvents could be an interesting solution for separating and/or detoxifying aqueous carbohydrate solutions produced using GVL-based biomass deconstruction processes.
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