Influence of the weighing bar size to determine optimal time of biodiesel-glycerol separation by using the buoyancy weighing-bar method

TALENTA - Conference on Engineering, Science and Technology 2017

工业技术;自然科学

Tambun, R.^1 ; Sibagariang, Y.^1 ; Manurung, J.^1

Department of Chemical Engineering, Universitas Sumatera Utara, Padang Bulan, Medan

20155, Indonesia^1

关键词: Different densities;    Floating particles;    Optimal time;    Particle size distribution measurement;    Separation time;    Settling particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/309/1/012067/pdf
DOI  :  10.1088/1757-899X/309/1/012067

来源: IOP

【 摘 要 】

The buoyancy weighing-bar method is a novel method in the particle size distribution measurement. This method can measure particle size distributions of the settling particles and floating particles. In this study, the buoyancy weighing-bar method is applied to determine optimal time of biodiesel-glycerol separation. The buoyancy weighing-bar method can be applied to determine the separation time because biodiesel and glycerol have the different densities. The influences of diameter of weighing-bar by using the buoyancy weighing-bar method would be experimentally investigated. The diameters of weighing-bar in this experiment are 8 mm, 10 mm, 15 mm and 20 mm, while the graduated cylinder (diameter : 65 mm) is used as vessel. The samples used in this experiment are the mixture of 95 % of biodiesel and 5 % of glycerol. The data obtained by the buoyancy weighing-bar method are analized by using the gas chromatography to determine the purity of biodiesel. Based on the data obtained, the buoyancy weighing-bar method can be used to detect the separation time of biodiesel-glycerol by using the weighing-bar diameter of 8 mm, 10 mm, 15 mm and 20 mm, but the most accuracy in determination the biodiesel-glycerol separation time is obtained by using the weighing-bar diameter of 20 mm. The biodiesel purity of 97.97 % could be detected at 64 minutes by using the buoyancy weighing-bar method when the weighing-bar diameter of 20 mm is used.