Abstract
The calorific value indicates the energy available in the fuel. It is therefore an important parameter to compare the consumption of biodiesel compared to mineral diesel. Another important feature is the cetane number, which measures the ignition quality of diesel fuel. A high cetane number indicates that the fuel will ignite faster than those with a lower value of this parameter. This work aims to obtain experimentally and compare the cetane number and calorific value of different blends of biodiesel from Tilapia visceral oil with petroleum diesel (B5, B10, B15, B20 and B30). The results show that the B5 blend has the highest calorific value (∆H= 44488.0 J g-1) followed by B10 (∆H = 44275.0 J g-1), B15 (H = 44053.0 g J-1), B20 (∆H = 43829.0 J g-1) and B30 (∆H = 42895.0 g J-1). However, the B5 blend have the lowest cetane number (47.7% vol), followed by B10 blend (53.0 vol%), B15 (58.6 vol%), B20 (62.5 % vol) and B30 (73.1 % vol). The increase of the studied biodiesel in blends with petroleum diesel improves the ignition quality of these blends. However, it decreases the calorific value of this same fuel.
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