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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (6): 73-80.doi: 10.3969/j.issn.0253-2417.2017.06.010

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Liquefaction of Corncob with Solid Acid as Catalyst in Near-critical Methanol-cyclohexane

PAN Qingqing1,2, ZHANG Jun1,2, WU Zhen1,2, LI Xun1,2, ZHANG Yu1,2, WANG Fei1,2   

  1. 1. Jiangsu Co-innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
    2. College of Chemical Engineering, Nanjing Forestry University;Jiangsu Key Lab. of Biomass-based Green Fuels and Chemicals, Nanjing 210037, China
  • Received:2017-07-24 Online:2017-12-25 Published:2018-01-05

Abstract: SO42-/TiO2-ZrO2 solid acid catalyst was prepared by co-precipitation and impregnation. The catalysts were characterized by Fourier transform infrared spectrometer(FT-IR), energy dispersive X-ray spectrometer(EDS) and nitrogen physisorption. The effects of solvent ratio, reaction temperature, reaction time and catalyst dosage on corncob conversion were investigated. The chemical compositions of liquefaction production with and without catalysts were determined by FT-IR and gas chromatography/mass spectrometry(GC-MS). The results indicated that SO42- was successfully loaded on the TiO2-ZrO2 and SO42-/TiO2-ZrO2 was a mesoporous material. The optimal conditions of liquefaction were 1 g corncob with 4% SO42-/TiO2-ZrO2 at 250℃ for 1.5 h when the volume ratio of methanol to cyclohexane was 2 and the solid-liquid ratio of corncob and solution was 1:15(g:mL), under which the liquefied rate reached the maximum of 76.67%. The main components of the liquefaction product were phenols and ester compounds.

Key words: near-critical, methanol-cyclohexane, corncob, catalytic liquefaction

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