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- W3011849488 endingPage "117520" @default.
- W3011849488 startingPage "117520" @default.
- W3011849488 abstract "In this paper, kraft lignin (KL) was fractionated by organic solvent method, and different lignin fractions were characterized by Gel permeation chromatography (GPC) and 1H–13C HSQC NMR. The active functional groups content was analyzed by 31P NMR and headspace gas chromatography (HS-GC). The results showed that fractionation could efficiently separate different molecular weight lignin fractions and the linkage bonds of lignin fractions F1 to F3 changed as follows: non-condensed linkages (β-O-4) and condensed linkages (β-5 and β-β) both decreased. Moreover, some active functional groups such as phenolic hydroxyl groups and methoxy groups increased by fractionation. The thermochemical properties and volatiles formation rule of fractionized kraft lignin during pyrolysis were studied by thermogravimetric (TG), kinetics analysis, in situ Fourier-transform infrared spectroscopy (FT-IR) and U-type tube closed system pyrolysis experiment. The result showed that low-molecule lignin fractions were easier to depolymerize than that with high-molecule. Low-molecule lignin fractions had better selectivity of S-type monomer products while high-molecule fractions had better selectivity of G-type monomer products, and pyrolysis conducted at a relatively higher temperature was beneficial to the generation of G-type monomer products." @default.
- W3011849488 created "2020-03-23" @default.
- W3011849488 creator A5007106362 @default.
- W3011849488 creator A5055493931 @default.
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- W3011849488 date "2020-06-01" @default.
- W3011849488 modified "2023-10-09" @default.
- W3011849488 title "Pyrolysis characteristics and volatiles formation rule of organic solvent fractionized kraft lignin" @default.
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- W3011849488 doi "https://doi.org/10.1016/j.fuel.2020.117520" @default.
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