期刊
BIORESOURCE TECHNOLOGY
卷 363, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127905
关键词
Ternary DES; Lignin; Less-condensed structure; Catalytic hydrogenolysis; High -purity cellulose
资金
- National Natural Science Foundation of China [32171713]
This paper presents a green and environmentally friendly method to obtain lignin with a structure similar to milled wood lignin (MWL) and high-purity cellulose from biomass. This is achieved through a two-step process: pretreatment with a ternary deep eutectic solvent (DES) to obtain lignin with a less-condensed structure, and catalytic hydrogenolysis to obtain high-purity cellulose. The results show that this method is effective in separating biomass and can significantly increase the yield of glucose after enzymatic hydrolysis.
This paper presented a green and environmentally friendly method to obtain lignin with a structure similar to milled wood lignin (MWL) and high-purity cellulose from biomass in a two-step process. The first step, maleic acid (MA), choline chloride (ChCl), and ethylene glycol (EG) ternary deep eutectic solvent (DES) pretreatment was performed to obtain lignin with less-condensed structure. The results showed that the obtained lignin had similar properties to MWL under the condition (MA/ChCl/EG = 1:5:15, 80?, 10 h). The DES recovered still had good cycle performance. The second step, the cellulose-rich residue was hydrogenated with isopropanol-water solvent and Raney nickel to obtain high-purity cellulose. The results showed that the purity of cellulose obtained by catalytic hydrogenolysis was > 94%. The glucose yield after enzymatic hydrolysis was 243.72 mg/g, which was 14.7 times higher than the untreated poplar. Overall, this work was of great significance for the effective separation of biomass.
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