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Reusable alkaline catalyzed organosolv pretreatment and delignification of bagasse for sugar platform biorefinery
Biomass Conversion and Biorefinery ( IF 3.5 ) Pub Date : 2021-01-06 , DOI: 10.1007/s13399-020-01269-w
Khatiya Weerasai , Navadol Laosiripojana , Saksit Imman , Torpong Kreetachat , Nopparat Suriyachai

An alternative sodium methoxide (CH3ONa) in methanol medium was investigated for the pretreatment of bagasse. The use of CH3ONa as an alkaline promoter resulted in relatively high delignification efficiency and solid glucan recovery. The modified pretreatment process helps improve the enzymatic hydrolysis for sugar production. The effect of the reaction condition was evaluated by response surface methodology (RSM) to determine the maximized glucose yield. The optimal condition was performed at 150 °C for 63.9 min in the presence of CH3ONa promoter of 5.1% w/v, leading to the delignification of 86.5% and the maximized glucose yield of 83.9%. The reusability suggests that the recovery of the solvent mixture without the purification process showed efficiency in consecutive batch processing with five cycles. Structural characteristic analysis (i.e., SEM and XRD) of pretreated bagasse demonstrated significant removal of lignin fraction, resulting in increased cellulose digestibility in enzymatic hydrolysis for sugar platform biorefinery.



中文翻译:

糖平台生物精炼厂可重复使用的碱性催化有机溶剂预处理和甘蔗渣脱木素

研究了甲醇介质中的另一种甲醇钠(CH 3 ONa)用于蔗渣的预处理。CH 3 ONa作为碱性助催化剂的使用导致较高的脱木素效率和固体葡聚糖的回收。改进的预处理过程有助于改善酶水解以生产糖。通过反应表面方法(RSM)评估反应条件的影响,以确定最大的葡萄糖产量。最佳条件是在CH 3存在下于150°C进行63.9分钟5.1%w / v的ONa启动子,导致86.5%的去木质素作用和83.9%的最大葡萄糖产率。可重复使用性表明,不进行纯化过程即可回收溶剂混合物,显示出在五个周期的连续批处理中效率很高。预处理的蔗渣的结构特征分析(即SEM和XRD)表明,木质素部分的去除率很高,从而导致糖平台生物精炼厂进行酶水解时纤维素的消化率提高。

更新日期:2021-01-06
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