文献类型：期刊文献

英文题名：Lignin-based solid acid catalyst for cellulose residue conversion into levulinic acid in biphasic system

作者：Chen, Zhihui[1];Zhang, Shuaibin[1];Yan, Bochao[1];Cai, Qinjie[1];Zhang, Suping[1]

机构：[1]East China Univ Sci & Technol, Res Ctr Biomass Energy, Sch Resources & Environm Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：178

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20220311486688);WOS:【SCI-EXPANDED(收录号:WOS:000779420400007)】；

基金：Acknowledgements This work was supported financially by the National Key R&D Pro-gram of China (2018YFB1501601) .

语种：英文

外文关键词：Levulinic acid; Cellulose residue; Carbon solid acid; Phosphoric acid activation; Biphasic system

摘要：Phosphoric acid-activated lignin-based solid acid catalysts (PLSA) were prepared from lignosulfonate by phosphoric acid activation, carbonation, and sulfonation. The physicochemical properties of catalysts were determined by SEM, N-2 adsorption-desorption, FT-IR, XRD, XPS and element analysis. Masses of phosphorous-containing group were grafted on catalyst surface during phosphoric acid activation and carbonation to provide sites for subsequent -SO3H substitution. PLSA could efficiently convert cellulose residue into levulinic acid. The effects of reaction temperature, residue time, catalyst loading, substrate concentration, solvent and catalyst stability were investigated and optimized. Using PLSA as catalyst, 67.9 mol% LA yield was obtained from 4 g cellulosic residue at 190 degrees C in 150 min in MIBK/H2O-NaCl. Overall, this work provides a valuable basis for the application of lignin-based solid acid in biomass valorization.