One-Pot Hydrolysis of Cellulose and Hemicellulose in Lignocellulosic Biomass Pretreated by NaOH-Freeze

One-Pot Hydrolysis of Cellulose and Hemicellulose in Lignocellulosic Biomass Pretreated by NaOH-Freeze
7 TOC new-zf3Biomass wastes were NaOH-freeze pretreated for one-pot hydrolysis with yields increased by >214% for cellulose, >59% for hemicellulose, respectively. (对生物质废弃物进行一锅法水解,NaOH 冷冻预处理后,纤维素水解率增加>214%,半纤维素水解率增加>59%。)

  Recently, Miss Tongchao Su (PhD student from China University of Science and Technology) supervised by Prof. Zhen FANG hydrolyzed cellulose and hemicellulose in lignocelluloses in one-pot. In their work, in order to achieve one-pot hydrolysis of cellulose and hemicellulose in lignocellulosic biomass, freeze pretreatment with 0−5 wt % NaOH (3 wt% was chosen as the best concentration) and subsequent microwave-assisted dilute sulfuric acid hydrolysis were applied to tropical plant wastes. Single factor optimization of hydrolysis of the pretreated bagasse was studied, and the best conditions (140 °C, 30 s, substrate/solvent ratio of 1/60 and 0.4 M H2SO4) were further applied to Jatropha and Plukenetia hulls. Under the best conditions, yields of sugars from cellulose (glucose) and hemicellulose (xylose, mannose, and arabinose) in the pretreated bagasse were 84.0% and 92.7%, enhanced by 273.4% and 59.3% as compared with untreated sample, respectively. For the pretreated Jatropha and Plukenetia hulls, yields of glucose and hemicellulose sugars were 85.7% and 93.3% (increased by 225.9% and 75.4%),  and 85.0% and 92.9% (increased by 214.8% and 81.4%), respectively.
The results were published:
TC Su, Zhen Fang*, One-pot microwave-assisted hydrolysis of cellulose and hemicellulose in selected tropical plant wastes by NaOH-freeze pretreatment, ACS Sustainable Chemistry & Engineering, 5(6), 5166–5174 (2017).

一锅法水解 经NaOH 冷冻预处理后的生物质中纤维素和半纤维素

  最近,苏同超同学(中国科学技术大学生命学院博士研究生)在方老师的指导下,对木质纤维素中的纤维素和半纤维素进行了一锅水解的研究。
为了实现木质纤维素生物质中的纤维素和半纤维素的同时水解,首先对生物质用0−5 wt% NaOH(3wt%被选为最佳浓度)冷冻预处理,随后进行微波稀酸水解。
对预处理后的甘蔗渣水解条件的优化进行了单因素实验研究,并利用所得的最佳条件(140 °C,30秒,生物质/溶剂比为1/60和0.4 M H2SO4)进一步用于小桐子和星油藤壳的水解。在最佳条件下,和未经处理的样品相比,预处理后的甘蔗渣纤维素糖产量(葡萄糖)和半纤维素(木糖、甘露糖、阿拉伯糖)糖产量,分别为84%和92.7%,提高了273.4%和59.3%。对预处理后的小桐子和星油藤壳,产生葡萄糖和半纤维素糖分别为85.7%和93.3%(分别增加225.9%、75.4%),85%和92.9%(分别增加了214.8%和81.4%)。
结果发表在ACS Sustainable Chemistry & Engineering: TC Su, Zhen Fang*, One-pot microwave-assisted hydrolysis of cellulose and hemicellulose in selected tropical plant wastes by NaOH-freeze pretreatment, ACS Sustainable Chemistry & Engineering, 5(6), 5166–5174 (2017).

Leave a Reply