Sustainable Aviation Fuel (SAF)
1. Environmental Features
- Significant lifecycle carbon reduction Reduces lifecycle greenhouse gas (GHG) emissions by up to 80% compared to conventional jet fuel, depending on feedstock and production pathway.
- Lower harmful emissions Reduces particulate matter (soot), sulfur oxides (SOₓ), and carbon monoxide (CO). Also helps lower contrail formation potential.
- Renewable & circular feedstocks Made from waste oils, fats, used cooking oil (UCO), agricultural residues, forest waste, algae, municipal solid waste, and captured CO₂.
- No direct competition with food crops Advanced SAF uses waste and non-edible biomass, avoiding food‑versus‑fuel conflicts.
2. Technical & Operational Features
- Drop‑in fuel compatibility SAF can be blended with conventional Jet A/A‑1 without modifying aircraft engines, fuel systems, or infrastructure.
- Meets strict aviation fuel standards Fully compliant with ASTM D7566 and meets the performance requirements of ASTM D1655 (Jet A‑1).
- High energy density Similar energy content to traditional jet fuel, ensuring comparable aircraft range and performance.
- Excellent low‑temperature properties Low freezing point suitable for high‑altitude flight.
- Good thermal stability Resists degradation at high temperatures, supporting safe operation in modern jet engines.
- Low sulfur & aromatic content Cleaner combustion, less engine wear, and lower corrosion.
3. Practical & Logistical Features
- Blendable up to approved limits Most SAF types approved for up to 50% blending (SAF + conventional jet fuel); some pathways allow 10% or 30%.
- Compatible with existing storage & distribution Uses the same fuel trucks, pipelines, tanks, and dispensing equipment.
- Non‑toxic & biodegradable Lower environmental risk in case of spills.
- Stable supply chain potential Can be produced locally from regional waste streams, improving energy security.
4. Regulatory & Commercial Features
- Globally certified for commercial flight Approved by FAA, EASA, ICAO, IATA, and major aircraft/engine manufacturers.
- Eligible for carbon offsetting schemes Recognized under CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation).
- Engine‑neutral solution Works with all current and future jet engines without retrofits.
| Parameter | Requirement | Test Method |
|---|---|---|
| Density at 20°C | 775–840 kg/m³ | ASTM D4052 |
| Kinematic Viscosity at 40°C | 1.0–8.0 mm²/s | ASTM D445 |
| Flash Point (Closed Cup) | ≥ 38°C | ASTM D93 |
| Freezing Point | ≤ -40°C (Jet A); ≤ -47°C (Jet A-1) | ASTM D2386 IATA |
| Net Heat of Combustion (Lower Heating Value) | ≥ 42.8 MJ/kg | ASTM D4529 |
| Total Sulfur Content | ≤ 3 mg/kg | ASTM D5453 |
| Aromatic Content | ≤ 25 vol% | ASTM D7798 |
| Olefin Content | ≤ 5 vol% | ASTM D6550 |
| Water Content | ≤ 300 mg/kg | ASTM D6304 |
| Acid Number | ≤ 0.015 mg KOH/g | ASTM D3242 |
| Oxidation Stability (Induction Period) | ≥ 6 hours | ASTM D2274 |
| Electrical Conductivity | 50–600 pS/m | ASTM D2624 |
| Distillation (D86) | - 10% recovered ≥ 150°C - Final boiling point ≤ 300°C | ASTM D86 |
| Metal Content (Fe, Cu, etc.) | ≤ 1 mg/kg | ASTM D5059 |
| Microbial Contamination | ≤ 10 CFU/mL | ASTM D6974 |
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