Combined biomimetic and inorganic acids hydrolysis of hemicellulose in Miscanthus for bioethanol production

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• 作者：Bin Guo^a ; Yuanhui Zhang^b ; Suk-Jin Ha^e ; ^f ; Yong-Su Jin^e ; ^f ; Eberhard Morgenroth^a ; ^c ; ^d ; ^{Eberhard.Morgenroth@eawag.ch}
• 关键词：Combined acid hydrolysis ; Biomimetic approach ; Miscanthus ; Hemicellulose decomposition ; Xylose degradation
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：110
• 期：Complete
• 页码：278-287
• 文件大小：444 K

摘要

Combined acid catalysis was employed as a pretreatment alternative with combined acid catalysts blending sulfuric acid with two biomimetic acids, trifluoroacetic acid (TFA) and maleic acid (MA), respectively. The influences of acid blending ratio, temperature, and acid dosage on pretreatment performance were investigated. A synergistic effect on hemicellulose decomposition was observed in the combined acid hydrolysis, which greatly increased xylose yield, although TFA/MA would induce more total phenols. Besides, combined TFA pretreatment could efficiently prevent xylose degradation. Fermentation tests of the acid-catalyzed hydrolysates with overliming showed that compared to H₂SO₄ pretreatment, TFA and MA pretreatments improved overall ethanol yield with an increase by 27-54%. Combined acid catalysis was shown as a feasible pretreatment method for its improved sugar yield, reduced phenols production and catalyst costs.