초록
<P><B>Abstract</B></P> <P>Herein, an efficient biphasic pretreatment process was developed to improve the production of furfural (FF) and glucose from <I>Eucalyptus</I>. The influence of formic acid and NaCl on FF production from xylose in water and various biphasic systems was investigated. Results showed that the addition of formic acid and NaCl significantly promoted the FF yield, and the biphasic system of MIBK (methyl isobutyl ketone)/water exhibited the best performance for FF production. Then the <I>Eucalyptus</I> was pretreated in the MIBK/water system, and a maximum FF yield of 82.0% was achieved at 180°C for 60min. Surface of the pretreated <I>Eucalyptus</I> became relatively rough and loose, and its crystallinity index increased obviously due to the removal of hemicelluloses and lignin. The pretreated <I>Eucalyptus</I> samples showed much higher enzymatic hydrolysis rates (26.2–70.7%) than the raw <I>Eucalyptus</I> (14.5%).</P> <P><B>Highlights</B></P> <P> <UL> <LI> A maximum furfural (FF) yield of 82.0% was obtained directly from <I>Eucalyptus</I>. </LI> <LI> The recovered solid residues showed a much higher digestibility (26.2–70.7%). </LI> <LI> Co-production of FF and glucose from <I>Eucalyptus</I> was achieved by biphasic pretreatment. </LI> <LI> Biphasic pretreatment is a promising route for FF and bio-ethanol industry. </LI> </UL> </P>