The capability of buoyancy weighing bar method in determining the separation time of biodiesel and glycerol at various concentrations

This study aims to examine the ability of the buoyancy weighing bar method in determining the separation time of biodiesel and glycerol at various concentrations. The comparison of biodiesel and glycerol concentrations studied are 99%: 1%; 98%: 2%; 97%: 3%; 96%: 4%, while the type of rod used is made of iron with a diameter of 10 mm and length of 210 mm. This research is conducted at room temperature and using gas chromatography analysis result as a comparison. The results are also compared with aluminium rods with diameter of 5 mm and 15 mm diameter, also compared with aluminium rods with length of 160 mm, 110 mm, and 60 mm diameter. From the results obtained, it is known that the buoyancy weighing bar method can predict the separation time at various concentrations of biodiesel and glycerol.