1 research outputs found
Hydrothermal Degradation of Cellulose at Temperature from 200 to 300 °C
Cellulose was treated with subcritical
water in a batch reactor
within a temperature range of 200–300 °C and reaction
time of 5–60 min. The main phases, such as water-soluble fraction,
acetone-soluble fraction and solid residue (remaining cellulose or
char), were separated and analyzed. The analysis of water-soluble
phase was done by HPLC equipped with UV and RI detector, whereas acetone-soluble
phase was analyzed by GC–MS. Total sugar content was determined
by the phenol-sulfuric acid colorimetric method. The properties of
char such as specific surface area, pore volume, and pore diameter
were determined by gas adsorption method. A water-soluble phase mainly
consists of sugar monomers and monomer degradation products, while
acetone-soluble phase, referred to also as bio-oil, consists of furans,
phenols, carboxylic acids, aldehydes, ketones, and high molecular
compounds. The reaction mechanism of cellulose in subcritical water
has been proposed based on the obtained results