林产化学与工业2026，Vol.46Issue(4)：9-16,8.DOI:10.20195/j.issn.0253-2417.2025053
金属盐协同预处理对木质素微波辅助解聚产物的影响
Impact of Synergistic Metal Salt Pretreatment on the Product Profile of Microwave-assisted Lignin Depolymerization
摘要
Abstract
Lignin(Fe-Lignin and W-Lignin)was pre-impregnated with inexpensive metal salts(ferrous sulfate and ammonium metatungstate),and microwave-assisted depolymerization of lignin was conducted via a microwave-assisted dynamic gas-phase flow reaction system to investigate the generation characteristics of the liquid and solid products from depolymerization.Electromagnetic properties showed that the dielectric loss tangent(tan δ)of lignin after pre-impregnation was higher than that of untreated lignin,especially ferrous sulfate-ammonium metatungsate pre-impregnation(W-Fe-Lignin),which increased the tan δ(2.45 GHz)of lignin from 0.039 to 0.072.Microwave-assisted depolymerization showed that W-Fe-Lignin raised the lignin conversion rate from 44.76%for untreated lignin to48.77%,while the yield of phenolic monomers represented by guaiacol and vanillin increased from 91.00 mg/g to 167.35 mg/g;W-Fe-Lignin also increased the tan δ(2.45 GHz)of lignin-based biochar to 0.197.Analysis of depolymerization products and multiphysics coupling indicated that W-Fe-Lignin,with high microwave absorption characteristics,could achieve rapid heating under microwave irradiation and convert to metal oxides,raising the temperature field from 570.5℃to 640.8℃,thereby promoting efficient lignin conversion and directional selectivity.关键词
木质素/金属盐/微波辅助解聚/单酚Key words
lignin/metal salt/microwave-assisted depolymerization/monophenol分类
化学化工引用本文复制引用
崔勇,付祎帅,王文亮,陈诚,徐晓露..金属盐协同预处理对木质素微波辅助解聚产物的影响[J].林产化学与工业,2026,46(4):9-16,8.基金项目
国家自然科学基金资助项目(32571992) （32571992）
江苏高校"青蓝工程"项目(2026QL) （2026QL）
苏州工业职业技术学院第二批校级教师团队建设项目(25KYTD01) （25KYTD01）
