一种新型表面活性剂辅助离子液体预处理甘蔗渣以提高酶解效率。
A novel surfactant-assisted ionic liquid pretreatment of sugarcane bagasse for enhanced enzymatic hydrolysis.
机构信息
Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
出版信息
Bioresour Technol. 2014 Oct;169:33-37. doi: 10.1016/j.biortech.2014.06.023. Epub 2014 Jun 26.
This study investigated a novel pretreatment method, as an essential step, for production of second generation bioethanol from sugarcane bagasse (SCB). Effect of tween 80 (TW) and polyethylene glycol 4000 (PEG) on SCB pretreatment was assessed using 1-butyl-3-methyl imidazolium chloride ([BMIM]Cl) as an ionic liquid (IL). Different concentrations of TW and PEG were used to determine the optimum concentration of surfactant for the highest percentage of cellulose conversion. TW and PEG increased lignin removal by 12.5% over the IL-only pretreated sample. The 3% (w/w) PEG showed a significant increase in enzymatic digestibility with an efficiency of 96.2% after 12h of hydrolysis; this was 23% higher than the efficiency of SCB pretreated with IL. The increase in digestibility of surfactant assisted IL pretreatment method can be attributed to the decrease in cellulose crystallinity, changes in the cellulose lattice, and delignification; which was confirmed by FT-IR, XRD and FE-SEM analysis.
本研究探讨了一种新型预处理方法，这是从甘蔗渣（SCB）生产第二代生物乙醇的重要步骤。采用 1-丁基-3-甲基咪唑氯([BMIM]Cl)作为离子液体（IL），评估了吐温 80（TW）和聚乙二醇 4000（PEG）对 SCB 预处理的影响。使用不同浓度的 TW 和 PEG 来确定表面活性剂的最佳浓度，以实现纤维素转化率的最大化。TW 和 PEG 使木质素去除率比仅用 IL 预处理的样品提高了 12.5%。3%（w/w）PEG 显著提高了酶解效率，水解 12 小时后的效率达到 96.2%；比 IL 预处理的 SCB 效率高 23%。表面活性剂辅助 IL 预处理方法的消化率提高可归因于纤维素结晶度降低、纤维素晶格变化和脱木质素；这通过 FT-IR、XRD 和 FE-SEM 分析得到了证实。
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