文献类型： 外文期刊

作者： Wei, Ni ¹ ; Qi, Shuang ¹ ; Wang, Guanhua ¹ ; Ge, Jing ¹ ; Sui, Wenjie ² ; Sun, Hao ¹ ; Parvez, Ashak Mahmud ³ ; Jia, Hongyu ⁴ ; Si, Chuanling ¹ ;

作者机构： 1.Tianjin Univ Sci & Technol, Coll Light Ind Sci & Engn, Tianjin Key Lab Pulp & Paper, Tianjin 300457, Peoples R China

2.Tianjin Univ Sci & Technol, Coll Food Sci & Engn, State Key Lab Food Nutr & Safety, Tianjin 300457, Peoples R China

3.Univ Stuttgart, Inst Combust & Power Plant Technol, IFK, Pfaffenwaldring 23, D-70569 Stuttgart, Germany

4.Shandong Acad Agr Sci, Jinan 250132, Shandong, Peoples R China

5.Nanjing Forestry Univ, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China

6.29 13th Ave,TEDA, Tianjin 300457, Peoples R China

关键词： Lignin reductive depolymerization; Liquid fuels; Condensation minimizing; Oligomer characterization; Lignin -first reductive fractionation

期刊名称：FUEL （ 影响因子：7.4； 五年影响因子：7.0 ）

ISSN： 0016-2361

年卷期： 2023 年 338 卷

页码：

收录情况： SCI

摘要： Lignin reductive depolymerization into phenolic monomers is a critical step for the scale-conversion of lignin into liquid fuels but its scale-up is still compromised by harsh reaction conditions (e.g. high temperature and high external H2 pressure) and inevitable condensations. Herein, we present an efficient acid-promoted reductive depolymerization of lignin over Ni/C without external H2 via a condensation minimizing approach using lignin monomer analogue (p-hydroxybenzyl alcohol, HBA) as the capping agent. With addition of 0.4 % H2SO4 and 0.4 mmol/g HBA, 20.42 % of phenolic monomer yield along with 31.70 % oligomer yield was achieved at 160 degrees C while the condensated/undepolymerized lignin yield was less than 10 %. HBA inhibited the acid-induced condensation by competitive reaction with the nucleophilic C6 in guaiacyl unit. When the approach was applied in lignin-first reductive fractionation of poplar, 32.72 % of phenolic monomer yield and 76.59 % of delignification were achieved at 160 degrees C in the presence of acid and HBA. Additionally, xylan was dissociated concurrently owing to the acid-catalyzed hydrolysis, resulting in a cellulose-rich solid residue. Consequently, this work proposes an efficient approach for lignin reductive depolymerization and lignin-first biomass fractionation under mild conditions through the synergism of acid and capping agent.