Coupled Pretreatment with Liquid Nitrogen and Ball Milling for Enhanced Cellulose Hydrolysis in Water
Coupled Pretreatment with Liquid Nitrogen and Ball Milling for Enhanced Cellulose Hydrolysis in Water
复制标题
液氮预处理和球磨联合增强纤维素在水中的水解
DOI：
10.1021/acsomega.9b01406
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发表时间：
2019
期刊：
影响因子：
4.1
通讯作者：
Qi Xinhua
中科院分区：
文献类型：
--
作者：
Shen Feng;Sun Shuang;Yang Jirui;Qiu Mo;Qi Xinhua
将纤维素转化为化学品和燃料的一个关键问题是纤维素由于其坚固的结构而产率较低。在这项工作中，首次通过液氮和球磨（LN-BM）耦合对纤维素进行预处理以进行纤维素水解。经过 LN-BM 处理后，HCl 水溶液从纤维素中得到的葡萄糖产率增加了近 2 倍，而由 H2SO4-NaVO3 催化的甲酸产率是未经处理的纤维素的 3 倍以上。产率也远高于单独球磨纤维素的产率。纤维素的结构变化表明，结晶度指数和分子量的降低都有助于提高转化效率，但前者是主导因素。本研究开发的液氮与球磨相结合是一种有效且环保的纤维素预处理方法。
A key problem in the conversion of cellulose into chemicals and fuels is the low product yield from cellulose due to its robust structure. In this work, for the first time, cellulose was pretreated with coupling of liquid nitrogen and ball milling (LN–BM) for cellulose hydrolysis. After the LN–BM treatment, the glucose yield from cellulose by HCl in water increased by almost 2 times and yield of formic acid catalyzed by H2SO4–NaVO3was more than 3-fold that obtained from untreated cellulose. The yields were also much higher than that from the individually ball-milled cellulose. The structure variation of cellulose indicated that reduction of both crystallinity index and molecular weight contributed to improving the conversion efficiency, but the former was the dominant factor. The combination of liquid nitrogen and ball milling developed in this work is an effective and environment-friendly approach for cellulose pretreatment.