为了改善生物燃油物理性质,提高生物燃油的稳定性,以农林废弃物快速裂解而成的生物燃油为样品,选取甲醇/乙醇(质量比1:1)的混合醇为添加剂,按照不同质量分数添加到生物燃油中,研究不同添加量的混合醇对生物燃油运动黏度、含水率、热值、闪点、密度和pH值的影响.实验结果表明:混合醇可以改善生物燃油各物理性质参数,添加5%~40%混合醇的生物燃油其运动黏度增加1.289~2.049 mm2/s,含水率下降10.07%~44.75%,热值上升1.70%~11.14%,闪点下降1.99%~14.44%,密度下降1.56%~12.23%, pH值上升8.51%~70.21%,并且变化速率降低,说明混合醇可以很好地改善生物燃油的物理性质.%In order to improve the physical properties and stability of bio-oil,the mixed alcohol of methanol and ethanol with the mass ratio of 1:1 as additive was added different mass fraction into the bio-oil obtained from fast pyrolysis of agricultural and forestry wastes as the sample. And the effect of different mass fraction of additive on the main physical properties of bio-oil,such as kinematic viscosity, water content, heat value, flash point, density and pH value were studied. The experimental results showed that the mixed alcohol could improve the physical properties of bio-oil. As the additions amount of 5% -40%, the kinematic viscosity of bio-oil increased by 1.289-2.049 mm2/s, the moisture content decreased by 10.07%-44.75%, the calorific value increased by 1.70%-11.14%,the flash point decreased by 1.99%-14.44%,the density decreased by 1.56%-12.23%,the pH value increased by 8.51%-70.21%,and the rate of change reduced,which indicated the physical properties of bio-oil could be improved by adding the mixed alcohol.
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