Journal of Agricultural and Food Chemistry
Article
process. The furfural yields for each reaction run are shown in
Figure 10. It was found that the furfural yield decreased from
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Figure 10. Reusability of LS in conversion of xylose into furfural.
Experimental conditions: 2 g of [BMIM]Cl, 200 mg of xylose, 250 mg
of LS, 100 °C, 1.5 h.
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1.0% for the first time to 15.1% for the fifth time. This
2
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demonstrated that the humins may form and accumulate during
the reaction, which affected the catalytic activity of LS in IL.
In summary, the homogeneous catalysis of LS in IL was
successfully utilized as an efficient and environmentally friendly
system for the conversion of xylose to furfural. The conversion
yield of furfural from xylose was up to 21.0% for 1.5 h under
mild conditions. LS was stable in the reaction process. The
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the furfural yield decreased from 21.0 to 15.1% after five cycles,
and the catalytic activity could be recovered after removal of the
accumulated humins. For the integration of using sustainable
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Funding
The project is supported by the State Key Program of National
Natural Science Foundation of China (No. 21336002),
Guangdong Natural Science Foundation (S2013040015055),
Fundamental Research Funds for the Central Universities
7
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(
2013ZM0050), Science and Technology Project of Guangz-
hou City in China (2014J2200063), National Natural Science
Foundation of China (31110103902), and Major State Basic
Research Projects of China (973-2010CB732204).
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The authors declare no competing financial interest.
ABBREVIATIONS USED
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DmM, Dendrocalamus membranaceus; LS, lignosulfonic acid;
IL, ionic liquid
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dx.doi.org/10.1021/jf502404g | J. Agric. Food Chem. 2014, 62, 7430−7435