有机溶剂
玉米秸秆
木质素
化学
分馏
木糖
生物炼制
酶水解
纤维素
半纤维素
水解物
肺表面活性物质
生物燃料
色谱法
乙醇燃料
丁醇
水解
发酵
有机化学
乙醇
生物化学
原材料
废物管理
工程类
作者
Di Cai,Jieyi Wen,Yilu Wu,Changsheng Su,Haoran Bi,Yankun Wang,Yong Jiang,Peiyong Qin,Tianwei Tan,Changwei Zhang
标识
DOI:10.1016/j.biortech.2023.130231
摘要
In this study, a surfactant-assisted diluted ethylenediamine (EDA) fractionation process was investigated for co-generation of technical lignin and biobutanol from corn stover. The results showed that the addition of PEG 8000 significantly enhanced cellulose recovery (88.9 %) and lignin removal (68.9 %) in the solid fraction. Moreover, the pulp achieved 86.5 % glucose yield and 82.6 % xylose yield in enzymatic hydrolysis. Structural characterization confirmed that the fractionation process promoted the preservation of active β-O-4 bonds (35.8/100R) in isolated lignin and functionalized the lignin through structural modification using EDA and surfactant grafting. The enzymatic hydrolysate of the pulps yielded a sugar solution for acetone-butanol-ethanol (ABE) fermentation, resulting in an ABE concentration of 15.4 g/L and an overall yield of 137.2 g/Kg of dried corn stalk. Thus, the surfactant-assisted diluted EDA fractionation has the potential to enhance the overall economic feasibility of second-generation biofuels production within the framework of biorefinery.
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