title: Combined biomimetic and inorganic acids hydrolysis of hemicellulose in Miscanthus for bioethanol production.
abstract: 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 H(2)SO(4) 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.
authors.affiliation: Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Newmark Lab, 205 N. Mathews Ave., Urbana, IL 61801, United States.
authors.forename: Bin
authors.initials: B
authors.lastname: Guo
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Zhang
authors.forename: Suk-Jin
authors.initials: SJ
authors.lastname: Ha
authors.forename: Yong-Su
authors.initials: YS
authors.lastname: Jin
authors.forename: Eberhard
authors.initials: E
authors.lastname: Morgenroth
mesh_terms: D000143:Acids / Q000378:metabolism*; D055162:Biocatalysis; D032701:Biomimetics; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006868:Hydrolysis; D006109:Poaceae / Q000378:metabolism*; D011134:Polysaccharides / Q000378:metabolism*
chemical_list: D000143:Acids; D011134:Polysaccharides; D000431:Ethanol; C007916:hemicellulose