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                                   Biodiesel

 

Broad prospects development of biodiesel

 

        Biodiesel is produced from renewable lipids resources, such as vegetable oils or animal fats obtained in a long-chain fatty acid alkyl monoester. "Bio" means relative to petroleum diesel, it is a renewale biological resources. Biodiesel as an alternative fuel, can be used in pure state or blended with petroleum diesel. It certainly help to save resources and becomes the mainstream  developing trend. 

 

Advantages of biodiesel

 

        First of all, it can be obtained from local renewable resource, so we can reduce dependence on imports of petroleum fuel; Secondly, it is biodegradable and non-toxic. Compared with petroleum diesel, biodiesel has many advantages in combustion and emission, such as lower emission of carbon monoxide, particulate matter and unburned hydrocarbons. Carbon dioxide produced by biodiesel combustion can circulate through photosynthesis cycle, the combustion of biodiesel impact on the greenhouse effect is minimized. Biodiesel has a high flash point than petroleum diesel with low volatility, making it safer in the storage and transportaion. The biodiesel has lubrication properties can reduce the wear of the engine, thus extending the life of the engine. In short,these advantages of biodiesel make it become a good substitute of petroleum diesel, and has been used in many countries, especially in the countries more emphasis on the environment. 

 

Biodiesel standard and test way

 

 

item	standard		Test way
	S500	S50
Density (20°C) / (kg/m³)	820--900		GB/T 2540
Kinematic viscosity (40°C)/(mm²/s)	1.9-6.0		GB/T 265
Flash point(closed cup)/°C      ≥	130		GB/T 261
Titre C(melting point) /°C	Actual measure		SH/T 0248
Sulphur content(mass fraction)/%	0.05	0.005	SH/T 0689
10% Carbon residue (mass fraction)%             ≤	0.3		GB/T 17144
Ash content (mass fraction)                    ≤	0.020		GB/T 2433
Moisture (mass fraction)                       ≤	0.1		SH/T 0246
mechanical impurity	NO		GB/T 511
corrosiveness to copper-copper strip(50°C, 3h)/grade                    ≤	1		GB/T 5096
Cetane number                   ≥	49		GB/T 386
Oxidation stability(110°C)/hour     ≥	5.0		EN 14112
Acid value/(mgKOH/g)            ≤	0.8		GB/T 264
free glycerol content(mass fraction) %              ≤	0.020		ASTM D 6584
total glycerin content(mass fraction) %              ≤	0.240		ASTM D 6584
90% recovered temperature         ≤	360		GB/T6536