High temperature dilute phosphoric acid pretreatment of corn stover for furfural and ethanol production

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• 作者：Ayse Avci ; Badal C. Saha ; Gregory J. Kennedy ; Michael A. Cotta
• 关键词：Corn stover ; Furfural production ; Dilute phosphoric acid pretreatment ; Enzymatic hydrolysis ; Ethanol fermentation ; Saccharomyces cerevisiae
• 刊名：Industrial Crops and Products
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：50
• 期：Complete
• 页码：478-484
• 全文大小：1340 K

文摘

Furfural was produced from corn stover by one stage pretreatment process using dilute H₃PO₄ and solid residues following furfural production were used for ethanol production by Saccharomyces cerevisiae NRRL-Y2034. A series of experiments were conducted at varied temperatures (140-200 ¡ãC) and acid doses (0.0-2.0 % , v/v) in order to determine optimal conditions. The effects of time (5-25 min) and substrate concentration (5-15 % , w/w) on furfural production were determined at optimal temperature (200 ¡ãC) and acid dose (0.75 % , v/v). Maximum furfural yield (10.8 ¡À 0.3 g/100 g stover) was achieved at 20-25 min duration with 5 % (w/w) corn stover which corresponds to 61.6 % of the potential yield. About 74 % of the glucan content of corn stover was converted to glucose after enzymatic digestion of solid residues. S. cerevisiae NRRL-Y2034 fermented glucose from the solid residues efficiently to ethanol. It produced 0.47-0.50 g ethanol per g glucose which corresponds to 92-99 % of the theoretical yield.