成分分離によるリグノセルロースの高付加価値利用技術開発(<特集>リグノセルロース系バイオマスの次世代技術開発の動向 I)

概要

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Lignocellulosics are composed of lignin and carbohydrates, forming semi-interpenetrating polymer network within the cell wall. In order to get aromatic and aliphatic materials sustainably from the ecosystem, the selective functionality control of both lignin (aromatic polymer) and carbohydrates (aliphatic polymers) is required. A novel refining process, the phase-separation system, has been developed in Mie University, Japan, in which the phenolysis of lignin and the hydrolysis of carbohydrates proceed simultaneously under normal temperature and normal pressure. Through this system, functionality controllable lignin-based polymers, lignophenols, and hydrolyzed carbohydrates are obtained quantitatively from lignocellulosics. The flow-through system plant includes the following steps: 1st : Lignin solvation, 2nd: Phase separation treatment, and 3rd : Separation. The resulting lignophenols are specially designed lignin-based polymers, having various application fields. From the counterpart, hydrolyzed carbohydrates, useful chemicals including bioethanol can be derived through fermentation, acid treatment, and hydrogenolysis, etc.
2010-12-20