Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents
Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents
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DOI：
10.1016/j.enconman.2019.06.070
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发表时间：
2019-09-15
影响因子：
10.4
通讯作者：
Boldor, Dorin
中科院分区：
文献类型：
--
作者：
Muley, Pranjali D.;Mobley, Justin K.;Boldor, Dorin
采用三种不同的深度共晶溶剂对生物质进行解构和木质素解聚。在2450 MHz微波反应器中测试了不同的温度（110度，130度和150度）和时间（1,5,10,15分钟）条件。草酸（130℃，15 min）和甲酸DES（150℃，15 min）的木质素产率最高。微波加热大大缩短了加工时间。核磁共振表征表明，微波加热在木质素解聚过程中促进了选择性键裂解，并且与传统加热技术相比具有较窄的分子量分布。分子动力学模拟表明，在微波辐射作用下，木质素的某些键被拉伸，增加了木质素键断裂的可能性。
Biomass deconstruction and lignin depolymerization was performed using three different deep eutectic solvents. Various temperature (110 degrees, 130 degrees, and 150 degrees C) and time (1, 5, 10, 15 min) conditions were tested in a 2450 MHz microwave reactor. Oxalic acid (130 degrees C, 15 min) and formic acid DES (150 degrees C, 15 min) gave the highest lignin yield. Microwave heating reduced the processing time significantly. NMR characterization shows that microwave heating promotes selective bond cleavage during lignin depolymerization and has a narrow molecular weight distribution compared to conventional heating techniques. Molecular dynamic simulations showed that certain lignin bonds are stretched under the electric field imparted during microwave irradiation, increasing its probability of breaking.