添加丙酮与乙酸乙酯对生物油稳定性的影响

Effects of acetone and ethyl acetate additives on the storage stability of bio-oil

    摘要
  • 摘要: 为了探究丙酮与乙酸乙酯对生物油储存特性的影响，将不同质量分数（3%、6%、9%、12%、15%）的丙酮和乙酸乙酯分别加入到生物油中，考察各组生物油理化特性随储存时间的变化。结果表明，添加丙酮和乙酸乙酯降低了生物油的含水率，且乙酸乙酯对生物油水分的降低效果优于丙酮。储存35 d后，15%乙酸乙酯组生物油的含水率为13.41%，比空白组（16.32%）降低了17.8%。加入添加剂后各组生物油的运动黏度均显著下降，与乙酸乙酯相比，丙酮对运动黏度影响较大。随着添加剂添加比例的增加，生物油运动黏度降低。储存35 d后，添加丙酮质量分数为3%、6%、9%、12%、15%的实验组生物油的运动黏度比空白组分别降低了37.20%、57.78%、71.92%、79.79%、84.67%。两种添加剂均能使生物油的pH值略微增大。红外光谱分析和气相色谱质谱联用分析显示，丙酮和乙酸乙酯抑制了生物油的老化反应。

     

    Abstract: Different ratios (3%, 6%, 9%, 12%, 15%) of acetone and ethyl acetate were added into crude bio-oil from fast pyrolysis to invest the effects of these two additives on the storage stability of bio-oil.The results show that both acetone and ethyl acetate can reduce the water content of bio-oil, and the ethyl acetate performes better than acetone.Compared to the blank control group, the water content decreases by 17.8%(from 16.32% to 13.41%) at 15% dose of ethyl acetate.The viscosities of bio-oil decrease a lot after adding acetone and ethyl acetate, and acetone shows more obvious effect.With the increasing of additive dose, the viscosity of bio-oil decreases.The viscosity of bio-oil decreases more than that of the control group by 37.20%, 57.78%, 71.92%, 79.79%, 84.67% with 3%, 6%, 9%, 12%, 15% dose of acetone, respectively.There is no significant difference in pH values among acetone and ethyl acetate addition groups and control group.According to the FT-IR and GC-MS analysis, it indicates that acetone and ethyl acetate inhibit the aging reactions of bio-oil during storage.

     

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