Autothermal, single-stage, performic acid pretreatment of Miscanthus x giganteus for the rapid fractionation of its biomass components into a lignin/hemicellulose-rich liquor and a cellulase-digestible pulp

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• 作者：Donncha Haverty^a ; Karla Dussan^a ; Anna V. Piterina^a ; ^b ; J.J. Leahy^a ; ^b ; M.H.B. Hayes^a ; ^{michael.h.hayes@ul.ie}
• 关键词：Performic acid pretreatment ; Delignification ; Biorefining ; Cellulose hydrolysis ; Lignocellulose
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：109
• 期：Complete
• 页码：173-177
• 文件大小：484 K

摘要

A novel approach to the performic acid pulping of biomass enables effective delignification and fractionation in a time frame not achieved heretofore. An autothermal decomposition reaction was triggered when 100 mg/L Fe₂(SO₄)₃ in 4.0 M NaOH was added to 5%or 7.5%H₂O₂ in aqueous formic acid containing chipped Miscanthus m>x giganteusm>. Peroxy-decomposition resulted in pressures of 19 and 35 bar in the 5%and 7.5%peroxide liquors and reduced the lignin content in the resulting pulps to <6%within 140 and 30 min, respectively. Solubilised lignin was available for recovery from the liquor by subsequent dilution with water. Hemicellulose removal to the liquor was 68%and 89%for the 5%and 7.5%peroxide solutions. Crystalline cellulose yields were >99%and >95%and the rate of glucose release from cellulase digestion of the pulps in 24 h was more than 20-fold that for the raw Miscanthus.