Eucalyptus globulus wood fractionation by autohydrolysis and organosolv delignification

详细信息    查看全文

• 作者：Aloia Roman&#xed ; ^a ; ^b ; Gil Garrote^a ; ^b ; ^{gil@uvigo.es"" rel=""nofollow} ; Francisco Ló ; pez^c ; Juan Carlos Parajó ; ^a ; ^b
• 关键词：Autohydrolysis ; Biorefinery ; Delignification ; Enzymatic hydrolysis ; Eucalyptus globulus
• 刊名：Bioresource Technology
• 出版年：2011
• 出版时间：May 2011
• 年：2011
• 卷：102
• 期：10
• 页码：5896-5904
• 全文大小：730 K

文摘

This work provides an assessment on the fractionation of Eucalyptus globulus wood by sequential stages of autohydrolysis (to cause the solubilization of hemicelluloses) and organosolv pulping (to dissolve lignin, leaving solids enriched in cellulose). With this approach, valuable products (hemicellulose-derived saccharides, sulphur-free lignin fragments and cellulosic substrates with low contents of residual hemicelluloses) are obtained in separate streams, according to the biomass refinery approach. Autohydrolysis was carried out under optimized operational conditions, and organosolv pulping was performed using uncatalyzed ethanol–water solutions. The effects of the most influential operational variables (autohydrolysis severity, delignification temperature and ethanol concentration in the organosolv stage) on solid yield, solid composition, cellulose susceptibility and recovery of the various fractions was assessed using statistical methods, which enabled the identification of the most favourable operational conditions.