Abstract
Adding pour point depressants (PPDs) to depress the cold filter plugging point (CFPP) of diesel has been widely used in the petroleum industry. This article describes the synthesis and evaluation of the performance of dialkylfumarate-styrene-vinyl acetate terpolymer (FSV) for improving the cold flow performance of the tested diesel fuels. The n-alkanes carbon distribution in the tested diesel samples was analyzed by gas-phase chromatography. The structures of the monomer and terpolymer were confirmed by infrared (IR) and 1H nuclear magnetic resonance (NMR). In order to investigate the wax formation process in diesel fuels before and after adding FSV, differential scanning calorimetry was selected as research method. The results indicate that the cold flow performance is the best using a mixture of higher carbon alcohols in the esterification reaction and the molar ratio of the reaction materials should be 1:2:1. When the dosage of FSV is 0.08 wt%, it can depress CFPP of the two diesel samples by 1°C and 4°C, respectively.
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