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Measurement of the physical properties of biodiesel fuels at temperatures up to 300°C.

机译:在高达300°C的温度下测量生物柴油燃料的物理性质。

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摘要

Experimental apparatus were designed for the measurement of the temperature dependant viscosity, surface tension and density of methyl and ethyl esters used as biodiesel fuels. Models for predicting the critical properties, viscosity, surface tension, and density of methyl and ethyl ester biodiesel fuels, based on their fatty acid composition, were applied. The measured and predicted properties for three commercial methyl and ethyl ester biodiesel fuels were compared.; In order to obtain the kinematic viscosities of biodiesel fuels at temperatures up to 300°C or the boiling point of the lightest oil fraction, a modified Saybolt viscometer was designed. The viscometer was used to measure the efflux times for 60 ml of methyl esters of canola and soy and ethyl esters of fish-oil. The Modified Saybolt Viscometer was calibrated using standard oil. On average, the error in kinematic viscosity was less than 0.056 mm2/s. Measured kinematic viscosities were found to decrease with temperature according to a modified Andrade equation.; Pendant Drop tensiometry and Axisymmetric Drop Shape Analysis-Profile (ADSA-P) methods were used to measure the surface tension of biodiesel fuels with and error less than 5.00 mN/m on the average. From the measured data it was concluded that the surface tension of biodiesel fuels decrease with temperature. (Abstract shortened by UMI.)
机译:设计了用于测量温度依赖性粘度,表面张力以及用作生物柴油燃料的甲酯和乙酯的密度的实验设备。应用了基于脂肪酸组成预测甲基和乙基酯生物柴油燃料的关键特性,粘度,表面张力和密度的模型。比较了三种商用甲基和乙基酯生物柴油燃料的测量和预测性能。为了在高达300°C的温度或最轻油馏分的沸点下获得生物柴油燃料的运动粘度,设计了一种改进的Saybolt粘度计。粘度计用于测量60 ml双低油菜籽和大豆的甲酯和鱼油的乙酯的流出时间。使用标准油对改良的赛伯特粘度计进行校准。平均而言,运动粘度误差小于0.056mm 2 / s。根据修正的Andrade方程,发现测得的运动粘度随温度降低。垂降滴定法和轴对称滴形状分析曲线(ADSA-P)方法用于测量平均误差小于5.00 mN / m的生物柴油燃料的表面张力。从实测数据可以得出结论,生物柴油燃料的表面张力随温度降低。 (摘要由UMI缩短。)

著录项

  • 作者

    Tate, Roxanne E.;

  • 作者单位

    Dalhousie University (Canada).;

  • 授予单位 Dalhousie University (Canada).;
  • 学科 Agriculture Agronomy.; Engineering Agricultural.; Energy.
  • 学位 M.A.Sc.
  • 年度 2005
  • 页码 126 p.
  • 总页数 126
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学(农艺学);农业工程;能源与动力工程;
  • 关键词

  • 入库时间 2022-08-17 11:42:13

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