Corncob Biorefinery for Platform Chemicals and Lignin Coproduction: Metal Chlorides as Catalysts
Corncob Biorefinery for Platform Chemicals and Lignin Coproduction: Metal Chlorides as Catalysts
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DOI：
10.1021/acssuschemeng.8b06337
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发表时间：
2019-02
影响因子：
8.4
通讯作者：
Qixuan Lin;Yuhuan Yan;Xiaohui Wang;Banggui Cheng;Ling Meng;Fengxia Yue;Wu Lan;R. Sun;Junli Ren
中科院分区：
文献类型：
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作者：
Qixuan Lin;Yuhuan Yan;Xiaohui Wang;Banggui Cheng;Ling Meng;Fengxia Yue;Wu Lan;R. Sun;Junli Ren
提出了一种玉米芯生物精炼厂的简便方法，重点关注碳水化合物的增值和木质素的稳定，以联产平台化学品（葡萄糖、木糖、阿拉伯糖和糠醛）和木质素。首先在双相体系（2-甲基四氢呋喃/H2O）中对玉米芯进行不同的金属氯化物预水解，然后对处理过的玉米芯进行酶水解。研究发现，碳水化合物和木质素的溶解和回收取决于预水解条件（金属氯化物浓度、温度和时间）；使用 25 mM FeCl3 在 140 °C 下 20 分钟产生 82.9% 木糖和 56.2% 阿拉伯糖，随后，通过将温度升至 180 °C 120 分钟，从该含水解产物的双相系统中产生糠醛，产率为 60.0%。玉米芯经FeCl3预水解，释放出99%的木聚糖，保留了91%的纤维素，纤维素酶解率较生玉米显着提高4.9倍。
A facile approach to a corncob biorefinery, focusing on both carbohydrate valorization and lignin stabilization, was proposed to coproduce platform chemicals (glucose, xylose, arabinose, and furfural) and lignin. Different metal chloride prehydrolyses of corncob in the biphasic system (2-methyltetrahydrofuran/H2O) were first carried out, followed by enzymatic hydrolysis of treated corncob. It was found that the dissolution and recovery of carbohydrate and lignin were dependent on the prehydrolysis conditions (metal chloride concentration, temperature, and time); 82.9% xylose with 56.2% arabinose was produced at 140 °C for 20 min using 25 mM FeCl3, and subsequently, furfural was generated in a yield of 60.0% from this hydrolysate-containing biphasic system by increasing the temperature to 180 °C for 120 min. The FeCl3 prehydrolysis of corncob released 99% xylan, retained 91% cellulose, and showed a significant enhancement in the cellulose enzymatic hydrolysis rate of 4.9-fold as compared to that for raw co...