桉木屑在离子液体[C4H8SO3Hmim]HSO4催化下液化行为研究

doi:10.3969/j.issn.0253-2417.2017.02.005

Abstract

Abstract: Eucalyptus sawdust was liquefied in ethylene glycol under atmospheric pressure using 1-(4-sulfobutyl)-3-methylimidazolium hydrosulfate([C₄H₈SO₃Hmim] HSO₄) as catalyst. The effects of the reaction time, temperature and dosage of catalyst on the liquefaction yield and the distribution of liquefaction products were studied. The results showed that the optimal conditions of liquefaction were: 10g eucalyptus sawdust, 60g ethylene glycol, 10 mmol [C₄H₈SO₃Hmim] HSO₄, 160 ℃ and 150 min. The liquefaction yield was up to 96.41% under the optimal conditions. The Fourier transform-infrared (FT-IR) spectra, thermal gravimetric and the X-ray diffraction analysis of the residual showed that the major component in the residue was cellulose with high crystallinity. The FT-IR analysis of water-insoluble products showed that water-insoluble products mainly included degradation products from lignin. The GC-MS analysis showed the water-soluble products mainly included levulinic acid and methyl levulinate which was originated from cellulose.

Key words: ionic liquid, eucalyptus sawdust, liquefaction, residue, soluble fraction

CLC Number:

TQ35

WU Honglou, CHEN Fangeng, WANG Jing. Liquefaction of Eucalyptus Sawdust Catalyzed by [C₄H₈SO₃Hmim] HSO₄[J]. Chemistry and Industry of Forest Products, 2017, 37(2): 42-48.

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Liquefaction of Eucalyptus Sawdust Catalyzed by [C₄H₈SO₃Hmim] HSO₄

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Liquefaction of Eucalyptus Sawdust Catalyzed by [C4H8SO3Hmim] HSO4

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Liquefaction of Eucalyptus Sawdust Catalyzed by [C₄H₈SO₃Hmim] HSO₄