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Title	γ-Valerolactone/CuCl₂ biphasic system for high total monosaccharides recovery from pretreatment and enzymatic hydrolysis processes of eucalyptus
ID_Doc	29814
Authors	Mo, SH; Zheng, Y; Gong, JY; Lu, MS
Title	γ-Valerolactone/CuCl₂ biphasic system for high total monosaccharides recovery from pretreatment and enzymatic hydrolysis processes of eucalyptus
Year	2024
Published	Frontiers Of Chemical Science And Engineering, 18.0, 11
Abstract	The efficient fractionation and recovery of monosaccharides (xylose and glucose) from lignocellulosic biomass facilitates subsequent sugar-based derivative production. This study introduces a one-pot gamma-valerolactone/ CuCl2 biphasic pretreatment system (100-mmolL-1 CuCl2, 180 degrees C, 60 min) capable of achieving removal rates of 92.25% and 90.64% for xylan and lignin, respectively, while retaining 83.88% of cellulose. Compared to other metal chlorides (NaCl, LiCl, FeCl3, and AlCl3), the gamma-valerolactone/CuCl2 system recovered 121.2 mg(g eucalyptus)(-1) of xylose and 55.96 mg(g eucalyptus)(-1) of glucose during the pretreatment stage and 339.2 mg(g eucalyptus)(-1) of glucose during the enzymatic hydrolysis stage (90.78% of glucose yield), achieving a total monosaccharide recovery of 86.31%. In addition, the recovery of gamma-valerolactone was 79.33%, exhibiting minimal changes relative to the pretreatment performance. The method proposed in this study allows a high total monosaccharides recovery and a circular economy-oriented pretreatment approach, offering a viable pathway for biorefinery.
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