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Enhanced Furfural Yields from Xylose Dehydration in the γ‐Valerolactone/Water Solvent System at Elevated Temperatures

Journal Article · · ChemSusChem
 [1];  [1];  [2];  [1]
  1. Department of Chemical and Biological Engineering University of Wisconsin–Madison Madison WI 53706 USA, U.S. Department of Energy, Great Lakes Bioenergy Research Center University of Wisconsin–Madison 1552 University Avenue Madison WI 53726 USA
  2. Department of Chemical and Biological Engineering University of Wisconsin–Madison Madison WI 53706 USA
Abstract

High yields of furfural (>90 %) were achieved from xylose dehydration in a sustainable solvent system composed of γ‐valerolactone (GVL), a biomass derived solvent, and water. It is identified that high reaction temperatures (e.g., 498 K) are required to achieve high furfural yield. Additionally, it is shown that the furfural yield at these temperatures is independent of the initial xylose concentration, and high furfural yield is obtained for industrially relevant xylose concentrations (10 wt %). A reaction kinetics model is developed to describe the experimental data obtained with solvent system composed of 80 wt % GVL and 20 wt % water across the range of reaction conditions studied (473–523 K, 1–10 m m acid catalyst, 66–660 m m xylose concentration). The kinetic model demonstrates that furfural loss owing to bimolecular condensation of xylose and furfural is minimized at elevated temperature, whereas carbon loss owing to xylose degradation increases with increasing temperature. Accordingly, the optimal temperature range for xylose dehydration to furfural in the GVL/H 2 O solvent system is identified to be from 480 to 500 K. Under these reaction conditions, furfural yield of 93 % is achieved at 97 % xylan conversion from lignocellulosic biomass (maple wood).

Sponsoring Organization:
USDOE
OSTI ID:
1454895
Alternate ID(s):
OSTI ID: 1537545
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Journal Issue: 14 Vol. 11; ISSN 1864-5631
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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