F.S. Asghari and H. Yoshida (Japan)
Acid catalyst, biomass, hydrolysis, subcritical water, wood
Decomposition of Japanese red pine wood under subcritical water (sub-CW) condition in presence and absence of phosphate buffer was investigated. Temperature and residence time as well as pH effect were investigated in detail. As a result, a large amount wood was hydrolyzed in water. At pH 2 it was realized an increasment in the hydrolysis and dissolution of wood chips. Moreover several water soluble products were identified. Except water soluble phase, acetone soluble and water-acetone insoluble phases were also isolated after sub-CW treatment which attributed mainly to the degraded lignin, tar and un-reacted wood chips, respectively. Several products in aqueous phase were identified and quantified. The initial wood/acid ratio was also investigated. Results showed that this ratio can exceed up to 3 without declining the efficiency. Size of wood chips as one of the most important parameter has also been investigated.
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