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| 生物柴油原料油的理化性能指标分析 |
| Physicochemical properties of biodiesel feedstock oils |
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| DOI： |
| 中文关键词: 生物柴油原料油 理化特性 氧化稳定性 |
| 英文关键词:biodiesel feedstock oil physicochemical property oxidation stability |
| 基金项目: |
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| 中文摘要: |
| 对17种生物柴油原料油分别进行密度、运动黏度、硫含量、酸值和氧化稳定性等性能指标的分析测定。结果表明：密度相差不大，其密度（20℃）在0.89～0.93 g/cm3之间，且随温度升高而降低；运动黏度均超过30 mm2/s，地沟油的最大，达到62.64 mm2/s；硫含量均相对较低，芝麻油的硫含量最高，达到201.48 mg/L；酸值（KOH）相差较大，大豆油的最低，为1.31 mg/g，地沟油的最大，达到164.47 mg/g，经过720 d的存放，小桐子油和橡胶籽油的酸值是原来的5.58倍和5.53倍；蓖麻籽油的氧化稳定性最好，诱导期时间达到39.10 h，地沟油的最差，诱导期时间为1.07 h，在两年的存放时间内，小桐子油诱导期时间从15.90 h降为5.24 h。 |
| 英文摘要: |
| The density, kinematic viscosity, acid value, sulfur content and oxidation stability of seventeen kinds of biodiesel feedstock oils were determined and analyzed. The results showed that the densities (20℃)of the oils were 0.89-0.93 g/cm3 and they decreased with temperature rising; all the kinematic viscosities were higher than 30 mm2/s, in which swill-cooked dirty oil reached 62.64 mm2/s; sulfur contents were relatively low, while sesame oil was especially high, reaching 201.48 mg/L; acid values had significant difference among the oils with the highest of swill-cooked dirty oil (164.47 mgKOH/g) and the lowest of soybean oil (1.31 mgKOH/g), and the acid values of Jatropha curcas
L. seed oil and rubber seed oil were 5.58 and 5.53 times of their fresh oils after storage for 720 d; the oxidation stability of castor seed oil was the best with induction period reaching 39.10 h, while that of swill-cooked dirty oil was the worst with 1.07 h of the induction period, and the induction period of Jatropha curcas L. seed oil shortened from 15.90 h to 5.24 h after storage for two years. |
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