Biodiesel is a renewable biofuel derived from biological feedstocks such as vegetable oils, animal fats, used cooking oil (UCO), and algae oils. Chemically, biodiesel consists of Fatty Acid Methyl Esters (FAME) produced through a controlled chemical reaction known as transesterification, where triglycerides react with methanol in the presence of a catalyst (typically sodium or potassium hydroxide).
Unlike fossil diesel, biodiesel is carbon-neutral in nature, as the carbon dioxide released during combustion is largely offset by the CO₂ absorbed by the feedstock plants during their growth cycle.
Biodiesel can be used pure (B100) or blended with conventional diesel in varying ratios, allowing seamless integration into existing diesel infrastructure with minimal or no engine modification.
Feedstock Sources
The performance and cold-flow behavior of biodiesel depend largely on its feedstock.
Common Feedstocks:
Vegetable Oils: Soybean oil, palm oil, rapeseed (canola), sunflower oil
Animal Fats: Tallow, lard, poultry fat
Used Cooking Oil (UCO): Cost-effective and sustainable
Algae Oil: High yield, next-generation biofuel feedstock
Each feedstock influences properties such as cloud point, pour point, oxidation stability, and cetane number.
Production Process – Transesterification
The biodiesel manufacturing process includes the following steps:
Feedstock Pretreatment: Removal of water, impurities, and free fatty acids
Transesterification Reaction: Oil + methanol + catalyst → FAME + glycerol
Separation: Glycerol is separated as a by-product
Washing & Purification: Removal of residual catalyst and methanol
Drying & Quality Testing: Final biodiesel meets ASTM / EN standards
By-product:
Crude Glycerin, widely used in pharmaceuticals, cosmetics, and chemical industries
By-product: Crude glycerin used in pharmaceuticals, cosmetics, and chemicals
Key Characteristics of Biodiesel (Expanded)
Renewable & Sustainable: Produced from biological sources that can be replenished annually
Lower Lifecycle Emissions: Up to 80–85% CO₂ reduction compared to petroleum diesel
High Cetane Number: Improves ignition quality and smoother combustion
Superior Lubricity: Reduces injector wear and fuel pump damage
Biodegradable: Decomposes 4–5 times faster than fossil diesel
Non-Toxic & Safer: Minimal health hazards during storage and handling
High Flash Point (≥130°C): Lower fire risk compared to diesel
Ultra-Low Sulphur: Reduces SOx emissions and acid rain
Energy Security: Reduces dependency on imported crude oil
Typical Fuel Properties (B100)
| Property | Typical Value |
|---|---|
| Density @ 15°C | 860 – 900 kg/m³ |
| Kinematic Viscosity @ 40°C | 4.0 – 6.0 mm²/s |
| Cetane Number | 47 – 65 |
| Flash Point | ≥ 130°C |
| Pour Point | -3°C to +15°C (feedstock dependent) |
| Cloud Point | 0°C to +16°C |
| Sulphur Content | < 15 ppm |
| Oxygen Content | 10 – 12% |
| Heating Value | 37 – 40 MJ/kg |
| Ash Content | ≤ 0.02% |
| Water Content | ≤ 500 ppm |
| Acid Value | ≤ 0.5 mg KOH/g |
Biodiesel Standards & Specifications
Biodiesel supplied for commercial use typically conforms to international standards:ASTM D6751 – USA
EN 14214 – Europe
IS 15607 – India
Compliance ensures engine compatibility, emission control, and fuel stability.
Available Forms / Biodiesel Grades
| Blend | Description | Typical Use |
|---|---|---|
| B100 | 100% biodiesel | Power plants, captive fleets |
| B20 | 20% biodiesel | Commercial transport |
| B10 | 10% biodiesel | Urban & government fleets |
| B5 | 5% biodiesel | OEM warranty-safe |
| B2 | 2% biodiesel | Fuel compliance blending |
B20 is globally recognized as the optimal balance between performance, cost efficiency, emission reduction, and cold-weather operability.
Applications
1. Automotive & Transportation
Passenger vehicles
Commercial trucks & buses
Government and municipal fleets
2. Industrial Machinery
Construction equipment
Mining and material-handling machinery
Industrial generators
3. Power Generation
Diesel generator (DG) sets
Backup and captive power plants
Remote and off-grid power systems
4. Marine & Shipping
Inland vessels
Fishing boats
Port and harbor equipment
5. Agriculture
Tractors and harvesters
Irrigation pump sets
Farm logistics vehicles
6. Heating Systems
Industrial boilers
Commercial heating applications
Institutional facilities
7. Commercial & Residential Use
Heating oil substitution
Backup energy solutions
Storage & Handling
Recommended storage in clean, dry, steel or HDPE tanks
Avoid prolonged exposure to air and moisture
Shelf life: 6–12 months (can be extended with antioxidants)
Cold climate use may require flow improvers or blending
Advantages Over Fossil Diesel
| Parameter | Biodiesel | Fossil Diesel |
|---|---|---|
| Renewable | Yes | No |
| Sulphur Content | Very Low | Higher |
| Lubricity | High | Moderate |
| Toxicity | Low | High |
| Flash Point | High | Low |
| Carbon Footprint | Low | High |
Why Buy Biodiesel From Our Company?
Consistent, certified quality from reputed producers
Compliance with international fuel standards
Competitive global pricing
Flexible order volumes (bulk & contract supply)
Reliable logistics & timely delivery (India / GCC / UK)
Technical support for blending and usage
Customized solutions for industrial and fleet requirements