中国科学院广州能源研究所 | 郝俊杰携岩征高压水热反应釜，在CEJ期刊发表生物质酸水解制备平台糖方向研究论文
发布时间：2025/6/23 8:48:43关注度：245
通过100mL高压水热反应釜对小麦秸秆进行稀酸预处理高效制备可发酵糖。Condensed lignin produced during dilute acid pretreatment is the main cause of low cellulose conversion and high enzyme dosage. In this study, polyethylene glycol (PEG) assisted low-concentration p-toluenesulfonic acid (p-TsOH) pretreatment for reducing lignin condensation and enhancing enzymatic hydrolysis of wheat straw was investigated. In addition, the structure of lignin in wheat straw before and after pretreatment was systematically characterized. The results indicated that the cellulose conversion of pretreated wheat straw was significantly improved. Under the optimized conditions (0.5 % PEG6000 and 1 % p-TsOH), the cellulose conversion of pretreated wheat straw increased by 41.03 % and the enzyme loading decreased by 70 %. The cellulose conversion of pretreated wheat straw reached 95.15 % when the enzyme loading was only 7.5 mg/g (3.39 FPU/g). The lignin characterization revealed that the β-O-4 structure in lignin was protected by the PEG, which was incorporated into the β-O-4 structure and formed etherified lignin with many hydroxyl tails. Thus, the increase in cellulose conversion is attributed to the fact that the lignin condensation was inhibited by PEG, which reduced the non-productive adsorption of enzyme. p-TsOH and PEG showed significant synergistic effects for the improvement of cellulose conversion. In summary, PEG assisted low-concentration p-TsOH pretreatment can effectively prevent lignin condensation and improve enzymatic hydrolysis efficiency.
不锈钢外釜整体棒料加工精致，无焊接，更安全；
抗腐蚀性好，无有害物质溢出，减少污染，使用安全；
升温、升压后，能快速无损地溶解在常规条件下难以溶解的试样及含有挥发性元素的试样；
外观美观，结构合理，操作简单，缩短分析时间，数据可靠；
内有聚四氟乙烯衬套，生成护理，可耐酸，碱等；
可替代铂坩埚解决高纯氧化铝中微量元素分析的溶样处理问题。
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