Huo Conceptulization Dan, Sun Yuekai, Yang Qiulin, Zhang Fengshan, Fang Guigan, Zhu Hongxiang, Liu Ying
Tianjin Key Laboratory of Pulp & Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science & Technology, Tianjin 300457, China; Shandong Huatai Paper Co., Ltd., Dongying 275335, China; Jiangsu Province Biomass Energy and Materials Laboratory, Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Tianjin Jianfeng Natural Product R&D Co., Ltd., Tianjin 300457, China.
Tianjin Key Laboratory of Pulp & Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science & Technology, Tianjin 300457, China.
Bioresour Technol. 2023 May;376:128937. doi: 10.1016/j.biortech.2023.128937. Epub 2023 Mar 21.
Deep eutectic solvents (DESs) with different acidity and alkalinity were applied for biomass pretreatment, and the conditions were optimized by response surface methodology. The results showed that lactic acid/betaine hydrochloride had the optimal pretreatment efficiency, where the removal rates of hemicellulose and lignin came up to 89% and 73%, and the enzymolysis efficiency was as high as 92%. Furthermore, eight types of chloride salts with different valence states were introduced into the DESs as the third component. The chloride salts could improve the pretreatment efficiency and positively correlated with the metal valence state. Specifically, AlCl was significantly superior in improving the pretreatment efficiency, where the enzymolysis efficiency reached 96% due to the destruction of crystalline region and the esterification of partial cellulose. Therefore, it is proposed that adding highly valent metal salts to acidic DESs has higher pretreatment and enzymatic efficiency.
将具有不同酸碱度的低共熔溶剂（DESs）应用于生物质预处理，并通过响应面法对条件进行优化。结果表明，乳酸/盐酸甜菜碱具有最佳的预处理效率，其中半纤维素和木质素的去除率分别达到89%和73%，酶解效率高达92%。此外，将八种不同价态的氯化物盐作为第三组分引入DESs中。氯化物盐可提高预处理效率，且与金属价态呈正相关。具体而言，AlCl在提高预处理效率方面显著优于其他盐，由于结晶区的破坏和部分纤维素的酯化作用，其酶解效率达到96%。因此，建议在酸性DESs中添加高价金属盐具有更高的预处理和酶解效率。
