【摘要】 生物油因水分含量高和呈酸性未能作为高品位能源直接规模化应用。利用分子蒸馏技术将生物油水分与酸性组分作为整体对象进行分离,既得到生物油酸性组分富集馏分,又获得了水分含量低、酸性较弱与热值较高的精制生物油Ⅰ(蒸馏重质馏分)与精制生物油Ⅱ(常温冷凝馏分)。同时,具体考察了精制前后生物油的pH值、热值和水分等参数的变化规律。研究表明,生物油的水分与酸性组分得到有效分离,精制生物油Ⅰ和Ⅱ的低级羧酸含量从原始生物油的18.85%分别降低至0.96%和2.2%更多还原

【Abstract】 The large-scale utilization of biomass pyrolysis oil directly as high-grade energy resources has been quite limited due to its high water content and acidity.The water and acid compounds as a whole,were separated from the pyrolysis oil by molecular distillation.One fraction obtained is rich in acid compounds,and the others are refined bio-oilⅠ(heavy distillate fractions) and Ⅱ(room temperature condensate) which have lower water content,weaker acidity and higher heating value.The physical properties of the crude and refined bio-oil,such as the pH value,heating value and water content were studied.The results indicated that water and acid compounds are separated effectively from the crude bio-oil.The content of carboxylic acids in crude bio-oil is about 18.85%,while that in the refined bio-oilⅠand Ⅱ is decreased to 0.96% and 2.2%,respectively.更多还原