The HCW experiments were conducted in a batch-type reactor (SUS 316, 14 ml) and equipped with Kthermocouple
to measure temperature of reaction. Slurry consisting of 10 ml water and 1.2 g sugarcane bagasse was
placed in the reactor. A stream of N2 gas was used to replace air in the reactor and to regulate initial internal
pressure of 0.5 MPa. The reactor was immersed into a preheated salt bath at the desired temperature and a given
reaction time. The reactor was then removed from the salt bath and the reaction was quickly quenched by immersion
of the reactor into a water bath to room temperature. The temperature range was from 200 to 300 °C and reaction
time from 3 to 30 min. At the end of the treatment, the treated slurry was collected and filtered using GP 16 glass
filter under vacuum to separate the solid and liquid fractions for further analysis.
Compositions of liquid products were analyzed by gas chromatography-mass spectrophotometer (GC–MS)
Agilent 6890 N which is equippedwith Jeol JMS-Q1000GC (A) system andhigh-performance liquid
chromatography (HPLC). The HPLC chromatograph was equipped with a KC-811 column (JASCO) and refractive
index (RI) detector (RI-2031, JASCO). The HPLC operated under the following conditions: oven temperature 50°C,
using 2 mM HClO4 as the mobile phase, delivered at a flow rate of 0.7 ml/min. At the same time, solid fraction was
dried at 105 °C until constant weight to yield the solid final product. Further, the solid fraction was subjected to
measure their content in cellulose, hemicelluloses and lignin using same methods as for raw material analysis.