Volatility and boiling points of biodiesel from vegetable oils and tallow
- 作者：Goodrum ; J.W.
- 关键词：Biodiesel ; Vapor pressure ; Boiling point ; TGA ; TGA/laser orifice ; Methyl ester ; Ethyl ester ; Tallow ; Vegetable oil
- 刊名：Biomass and Bioenergy
- 出版年：2002
- 期刊代码：3_09619534
- 类别：pw
- 出版时间：March, 2002
- 卷：22
- 期：3
- 页码：205-211
- 文件大小：155 K
摘要
Quality control of fuel-related properties of Biodiesel, such as volatility, is needed to obtain consistent engine performance by fuel users. The vapor pressures and boiling points of selected methyl esters and vegetable oils are proposed as quality control metrics for Biodiesel. This type of data was obtained by a rapid new method using thermogravimetric analysis (TGA). One atmosphere boiling points (bps) and temperature-dependent vapor pressures from 1atm down to 5.332kPa(40mmHg) were measured for methyl and ethyl esters of rapeseed oil, canola oil, soybean oil, and tallow. Boiling points (1atm) ranged from 340°C to 375°C. Methyl and ethyl esters of a given oil differ by ca. 5°C in bps. These results are discussed in terms of the fatty acid composition of the esters and oils. Calibrations showed that the TGA/laser orifice capsule method gave accuracy of ±5%.