Biodiesel is a kind of fuel for internal combustion engine, which is obtained from animal vegetable oil and low carbon alcohol (such as methanol) through esterification reaction. It is a renewable and pollution-free green clean fuel and can be widely used as fuel for automobiles, internal combustion engines and power plants. It can be used alone or mixed with 0 # mineral diesel in any proportion. Compared to mineral diesel, biodiesel has the following advantages:
1. Free of benzene and other aromatic rings, non-toxic and biodegradable;
2. Renewable, reducing human dependence on fossil fuels;
3. The combustion inside the internal combustion engine is more complete, and the emissions of particulate matter (black smoke), carbon monoxide, and nitrogen oxides are significantly reduced;
4. Higher cetane number can improve ignition and lubrication performance, and has higher engine efficiency and durability;
5. The flash point is significantly higher than that of mineral diesel, which has good storage and transportation safety.