New Pretreatment Methods Combining a Hot Water Treatment and Water/Acetone Extraction for Thermo-Chemical Conversion of Biomass
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- 作者：Isao Hasegawa ; Kazuhide Tabata ; Osamu Okuma ; and Kazuhiro Mae
- 刊名：Energy & Fuels
- 出版年：2004
- 出版时间：May 2004
- 年：2004
- 卷：18
- 期：3
- 页码：755 - 760
- 全文大小：111K
- 年卷期：v.18,no.3(May 2004)
- ISSN：1520-5029
文摘
New pretreatment methods were developed for separating hemicellulose, cellulose, and ligninfrom biomass for their efficient use in the thermo-chemical conversion of each component. Onemethod is basically a two-step process. Biomass treated in hot water at 180 
C was extracted ina flowing stream of water/acetone mixture under 10 MPa at 230 C. Through the hot watertreatment, hemicellulose in biomass was successfully recovered as saccharides, leaving ligninand cellulose as a solid. Through the sequential extraction by the water/acetone solvent, ligninwas depolymerized into the water/acetone-soluble compounds and the residual cellulose was partlydehydrated. The other method is a one-step process, in which biomass was directly extracted in50% water/acetone solution at 200 C using a batch reactor, and the residue was pure cellulose.The proposed methods were expected to be new routes for converting low-grade resources intovaluable chemicals.
C was extracted ina flowing stream of water/acetone mixture under 10 MPa at 230 C. Through the hot watertreatment, hemicellulose in biomass was successfully recovered as saccharides, leaving ligninand cellulose as a solid. Through the sequential extraction by the water/acetone solvent, ligninwas depolymerized into the water/acetone-soluble compounds and the residual cellulose was partlydehydrated. The other method is a one-step process, in which biomass was directly extracted in50% water/acetone solution at 200 C using a batch reactor, and the residue was pure cellulose.The proposed methods were expected to be new routes for converting low-grade resources intovaluable chemicals.