文献类型：期刊文献

英文题名：Facile Directional Conversion of Cellulose and Bamboo Meal Wastes over Low-Cost Sulfate and Polar Aprotic Solvent

作者：Liu, Chao[1] Wei, Min[1] Wang, Jia[2] Xu, Junming[1,2] Jiang, Jianchun[1,2] Wang, Kui[1,2]

通信作者：Wang, K[1];Wang, K[2]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China

年份：2020

卷号：8

期号：14

起止页码：5776-5786

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20201808596786);Scopus(收录号：2-s2.0-85083917116);WOS:【SCI-EXPANDED(收录号:WOS:000526375000036)】；

基金：The authors would like to thank the National Natural Science Foundation of China (31530010, 31870714) and the Youth Talent Support Program for Science & Technology Innovation of National Forestry and Grassland (2019132603) for financial support.

语种：英文

外文关键词：Biomass; Cellulose; Sulfate; Polar aprotic solvent; Synergistic effect

摘要：Directional depolymerization is a critical step for the integrated utilization of waste lignocellulosic biomass resources to produce value-added biofuels and biochemicals. Herein, we demonstrate an efficient and environmentally benign liquefied process for converting cellulose and waste lignocellulosic residues into levulinic acid (LA) in a polar aprotic solvent using a low-cost sulfate as catalyst. Due to the synergistic effect between the gamma-valerolactone (GVL) and an active acid center derived from sulfate, more than 77 mol % and 61 mol % of biochemicals were obtained from cellulose and bamboo meal wastes in GVL/H2O (m/m = 9:1) solvent at 200 degrees C for 2 h, respectively. A combination of Al-27 NMR spectroscopy and electrospray quadrupole time-of-flight tandem mass spectrometry (ESI-Q-TOF-MS/MS) revealed that the [Al-(OH)(2)(aq)](+) species significantly contributed to cellulose depolymerization under cationic polarization of polar aprotic solvents. Besides, the existence of an appropriate amount of water was believed to be responsible for promoting the destruction of cellulose and the restraint of humin formation. Notably, all solvents and byproducts could be efficiently retrieved during this process, which shed light on its considerable industrial application prospects and facilitated the high value-added utilization of waste biomass resources.