Effect of Added Acrylate Demulsifier for Increasing Antioxidants Functional in Diesel Fuel Oil

Abstract

Biodiesel is produced by an esterification process with hygroscopic chemicals, otherwise the biodiesel is very easy to produce water, and the hydrocarbon compounds were easily oxidized, causing corrosion in the stockpiling process such as in storage tanks and distribution pipes. Antioxidants have been shown to reduce the formation of water in the biodiesel stockpiling process. While the demulsifier plays a role in helping to separate water and oil. In this study, the addition of an acrylate-based demulsifier in the accumulation of biodiesel-containing antioxidants was carried out. The antioxidant used in the form of tertiary butylhydroquinone with a concentration of 0.5 M has been able to play an active role in inhibiting the formation of water in the biodiesel stockpiling process. However, the stability of the water and oil emulsion has not been achieved properly, therefore the addition of an acrylate-based demulsifier with a volume of 2 mL, 5 mL, and 10 mL into 100 mL biodiesel can separate oil and water well. The biodiesel that has been added with a demulsifier is evaluated at storage times of 24 hours, 48 hours, and 72 hours. The result is that the storage for 72 hours is more effective in separating water and oil than storage for 24 hours and 48 hours. To evaluate the water content in the biodiesel stockpiling process out using 831 KF Coulometric and Fourier-Transform Infrared Spectroscopy analysis.