醇水共溶剂中KOH高效催化液化互花米草制备生物油

doi:10.3969/j.issn.0253-2417.2018.04.013

Abstract

Abstract: In the paper invading plants Spartina alterniflora Lois. (S. alterniflora) was chosen as raw materials and catalytic liquefied (CL) in ethanol-water with the participation of the readily available alkaline catalyst KOH. The effects of different process conditions on the bio-oil yield and residue yield of S. alterniflora were investigated. Additionally, to investigate the effect of the action of KOH on bio-oil yield, residue yield and the composition of bio-oil, direct liquefaction (DL) was carried out with the same reaction parameters as comparison. The results showed that the conditions of liquefaction reaction of S. alterniflora could be alleviated with the cation of catalyst KOH and the maximum bio-oil yield (52.30%) as well as fractional conversion (90.17%) were observed at the optimal conditions of 320℃, ethanol volume fraction 75%, ratio of liquid to material 10:1 (mL:g) and reaction time 60 min. SEM micrographs of solid residue indicated that volatiles were vented during initial stages of depolymerisation of S. alterniflora with the participation of KOH. GC-MS analysis and FT-IR analysis of bio-oil indicated that the composition of main ingredients of bio-oil was not significantly changed by the action of KOH but the mass fraction was impacted to a certain degree. Phenolic compounds of bio-oil increased significantly from 29.88% to 40.98% and ester compounds reduced evidently of which the mass fraction was 10.40%.

Key words: phenol, ester, alkaline catalyst, KOH, catalytic liquefaction

CLC Number:

TQ35

XU Guisheng, HE Zhixia, XU Zhixiang, JI Changhao, WANG Qian. Catalytic Liquefaction of Spartina alterniflora in Ethanol-water Co-solvent for Bio-oil[J]. Chemistry and Industry of Forest Products, 2018, 38(4): 79-86.

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Catalytic Liquefaction of Spartina alterniflora in Ethanol-water Co-solvent for Bio-oil

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