Multiple Regression Analysis of the Effects of Biodiesel Components on Low Temperature Flow Performance
1. College of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of Education, Kunming 650093, China;
3. Yunnan Electric Power Research Institute (Group) Co, Ltd, Kunming 650093, China
Abstract：To better understand the effect of biodiesel components on its low temperature fluidity, the relationship between the components and low temperature fluidity of biodiesel was explored. Biodiesel was prepared by alkali-catalyzed transesterification and the low-temperature fluidity detection of biodiesel and gas chromatography-mass spectrometry(GC-MS) analysis were conducted. The correlation between the components and low-temperature fluidity was established by multiple regression method. The results showed that the low temperature fluidity of biodiesel was very different. The cold filter point and the freezing point temperature of rapeseed oil biodiesel were the lowest of -13 and -10 ℃, while the palm oil biodiesel had the highest cold filter and freezing temperatures. They were 12 and 16 ℃, respectively. The difference was mainly due to the different biodiesel component contents and the nature of the components themselves. By GC-MS analysis, biodiesel was mainly composed of five kinds of fatty acid methyl esters with a content of more than 90%. The multi-regression method was used to analyze the influence of biodiesel components on low-temperature fluidity and the prediction models of freezing point, cold filter point and kinematic viscosity of main components in biodiesel, such as methyl stearate, methyl palmitate, methyl oleate, methyl linoleate and methyl linolenate, were established. The correlation coefficient was found to be above 0.95, which could well predict the low temperature fluidity of biodiesel.
Wang Wenchao1,2,Li Fashe1 et al. Multiple Regression Analysis of the Effects of Biodiesel Components on Low Temperature Flow Performance[J]. 化学反应工程与工艺, 2018, 34(4): 365-372.
