Why Biodiesel?

Biodiesel is one of the most promising alternative fuels to be used in diesel engines because it is renewable and sustainable, highly biodegradable, minimal toxicity, it has similar chemical and physical properties to that of mineral diesel, high availability and relatively cost equivalent to diesel fuel. Further, biodiesel pro­duces less pollutant to the environment when burned, it is less nocive to human health, and it provides better lubricity as compared to that of diesel fuel (reduced engine wear and friction). It does not contain carcinogens, such as poly-aromatic hydrocarbons and nitrons poly-aromatic hydrocarbons, it causes significant improvement of rural economic potential and promotes sustainable rural devel­opment, it can recycle the CO2 from their combustion through photosynthetic ways, it has lower sulfur than the diesel fuel, the cetane number is similar or close to that of diesel fuel. Heating values of various vegetable oils are nearly 90 % to those of diesel fuel [1, 4, 6, 7, 9, 17-22]. On the other hand, as disadvantages biodiesel has high viscosity, high molecular weight, and low volatility. Thus, in some cases can lead to problems such as severe engine deposits (carbon), injection cooking, and piston ring sticking, clogged filters, especially in low temperature, and thus it affects engine durability [5, 7, 19, 21].

The majority of studies have found sharp reductions in exhaust emissions with biodiesel as compared to diesel fuel. The more accepted reasons in reduction of emissions particularly CO, C02, hydrocarbons, S02, particulates, and smoke can be attributed to the presence of sufficient oxygen in biodiesel. Biodiesel contains about 10 % oxygen while diesel has no oxygen content [17, 23]. Thus, biodiesel appears as an appropriated alternative fuel to be used in diesel engine.

Updated: September 26, 2015 — 10:16 am