以三叉苦药渣木质素为原料,在低共熔溶剂（ChCl-MeOH-AlCl3·6H2O）与催化剂（Cu（OAc）2/邻菲罗啉）耦合作用下解聚生成高密度航油合成原料,考察不同反应温度、时间、固液比、催化剂添加量与氧气含量对木质素催化氧化解聚效果的影响。结果表明：在固液比1∶30 g/mL,木质素、Cu（OAc）2、邻菲罗啉的质量比1∶1∶1,3 MPa氧压,60 ℃条件下反应3 h后,木质素选择性解聚生了芳香醛酮类高密度航油合成原料,木质素转化率达到80.84%,香草乙酮与香草醛收率分别为16.69％和34.39%。
Abstract
Herein, Lignin from evodia lepta was used as raw material to depolymerize under the coupling of deep eutectic solvent （ChCl-MeOH-AlCl3·6H2O） and catalyst （Cu（OAc）2/1,10-phenanthroline） to generate feedstock for synthesising high-density jet fuel , and the effects of different reaction temperatures, times, solid-liquid ratios, catalyst additions and oxygen pressures on the catalytic oxidative depolymerization of lignin were investigated. The results showed that under the conditions of solid-liquid ratio of 1∶30 g/mL, mass ratio of lignin to Cu（OAc）2 and 1,10-phenanthroline of 1∶1∶1, oxygen pressure of 3 MPa and 60 ℃ for 3 h, the lignin was selectively depolymerized to produce aromatic aldehydes and ketones used as feedstock for synthesizing high-density jet fuel. The lignin conversion rate reached 80.84%, and the yields of acetovanillone and vanillin were 16.69% and 34.39%, respectively.
关键词
生物质 /
木质素 /
氧化解聚 /
低共熔溶剂
Key words
biomass /
lignin /
oxidative depolymerization /
deep eutectic solvents
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基金
国家自然科学基金（51876206; 52276192）; 广州市重点研发计划（202103000011）
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