解聚
木质素
化学
有机化学
催化作用
热解
热重分析
乙醚
作者
Jijiao Zeng,Chang Geun Yoo,Fei Wang,Xueqing Qiu,Wilfred Vermerris,Zhaohui Tong
出处
期刊:Chemsuschem
[Wiley]
日期:2015-03-01
卷期号:8 (5): 861-871
被引量:81
标识
DOI:10.1002/cssc.201403128
摘要
By mimicking natural lignin degradation systems, the Fenton catalyst (Fe(3+), H2O2) can effectively facilitate lignin depolymerization in supercritical ethanol (7 MPa, 250 °C) to give organic oils that consist of mono- and oligomeric aromatics, phenols, dicarboxylic acids, and their derivatives in yields up to (66.0±8.5) %. The thermal properties, functional groups, and surface chemistry of lignin before and after Fenton treatment were examined by thermogravimetric analysis, pyrolysis-gas chromatography-mass spectrometry, (31)P NMR spectroscopy, and X-ray photoelectron spectroscopy. The results suggest that the Fenton catalyst facilitates lignin depolymerization through cleavage of β-ether bonds between lignin residues. The formation of a lignin-iron chelating complex effectively depresses lignin recondensation; thus minimizing charcoal formation and enhancing the yield of liquid products.
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