Abstract
Biodiesel is a renewable alternative diesel fuel made from plant oils, waste cooking greases and animal fats. Its’ most common form is fatty acid methyl esters (FAME) from transesterification of lipids and methanol. Biodiesel has physical properties that compare well with conventional diesel fuel (petrodiesel). However, biodiesel has poor cold flow properties that must be monitored in cold weather. In this work, three correlation models are introduced that accurately calculate the cold filter plugging point (CFPP) of biodiesel. The models were developed using measured CFPP data from neat (unblended) biodiesel fuels and 24 binary biodiesel admixtures. The biodiesel fuels studied were from canola, palm and soybean oils and yellow grease (CaME, PME, SME and YGME). The solid-liquid equilibrium (SLE) model required accurate concentration, melting point (MP) and enthalpy of fusion (ΔHfus) data for each FAME species in the mixture. These data were used to infer the SLE phase transition temperature (TSLE) of the ...
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