Estimating and improving cold filter plugging points by blending biodiesels with different fatty acid contents |
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Authors: | Gwi-Taek Jeong Jae-Hee Park Seok-Hwan Park " target="_blank">Don-Hee Park |
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Institution: | (1) United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, 1815 N University St, Peoria, IL 61604, USA |
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Abstract: | Biodiesels are alkyl esters produced by transesterification of higher fatty acids (aliphatic chains composed of 14 to 22 carbon
units) from animal fats and/or vegetable oils. The cold filter plugging points (CFPP) of biodiesels are not only higher than
that of petro-diesel, but they also differ from the melting point of the raw (unesterified) materials. In this study, we empirically
derived equations that estimated the CFPP of a biodiesel based on its fatty acid content, using various biodiesel blends containing
four methyl esters with different fatty acid compositions: soybean (SME), palm (PME), rapeseed (RME), and lard (LME). These
blending ratio experiments yielded three equations that described the correlation between CFPP and fatty acid content: Y (CFPP,
°C) = −3.1X (blending ratio) − 12.7 (PME/SME); Y = 2.2X − 10.7 (LME/SME); and Y = −4.0X − 13.0 (PME/RME). We also obtained
the correlation between CFPP and total saturated fatty acid methyl ester content in the biodiesels: Y (CFPP, °C) = 0.449X
(total saturated fatty acid methyl ester content, wt%) − 9.198. These empirical equations accurately predicted CFPP values
of biodiesel compounds with known fatty acid compositions, facilitating the use of diverse biodiesels in industrial fields.
The first two authors equally contributed to this work. |
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Keywords: | biodiesel transesterification cold filter plugging point prediction |
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