Acid Catalyzed Subcritical Water Conversion of Japanese Red Pine Wood (Pinus Densiflora) into Valuable Chemicals

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.

Important Links:

Go Back