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- W68332212 abstract "The structure of milled wood lignin(MWL), isolated via the Bjorkman procedure, was studied by means of 1 H NMR spectroscopy and Fourier transform infrared spectroscopy, and then its pyrolytic product distribution was investigated on a pyrolysis device. MWL obtained from Manchurian Ash(MA) contained more methoxyl and free phenolic hydroxyl groups per C9 unit than MWL from Mongolian Pine(MP) due to the existence of both guaiacyl and syringyl units, which have a major influence on the pyrolysis behavior of lignin. The results of pyrolysis show that MWL from MA generated a higher yield of bio-oil, mainly composed of phenols, guaiacols, syringols and catechols, and a less yield of char, in addition to the gaseous products CO, CO2, methane and methanol, compared with MWL from MP. Guaiacol and syringol were the typical products from G-lignin and S-lignin, probably attributed to the easi- er cleavage of the aryl-alkyl linkage in the side chain compared with the C―OCH3 bond in the benzene ring. The de- gradation of MWL from MP was dominated by the demethylation reaction and the cleavage of aliphatic ―CH2OH at the γ-position, followed by the cracking of the Cα―Cβ and C4―Cα bonds. Keywords Pyrolysis; Milled wood lignin(MWL); Guaiacyl unit; Syringyl unit Article ID 1005-9040(2011)-03-426-05" @default.
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- W68332212 date "2011-01-01" @default.
- W68332212 modified "2023-09-23" @default.
- W68332212 title "Experimental Researches on Milled Wood Lignin Pyrolysis Based on Analysis of Bio-oil" @default.
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