Standard Specification for Aviation Turbine Fuel Containing Synthesized Hydrocarbons
含合成烃航空涡轮燃料标准规范
Scope
The specification that defines what a sustainable aviation fuel is. Each approved production pathway gets its own annex with its own maximum blend ratio into conventional jet fuel. Once blended and re-certified against ASTM D1655, the product is handled as conventional jet fuel with no separate infrastructure. Note that the HEFA pathway in Annex A2 is essentially the same hydrotreatment chemistry as HVO for diesel, applied to a kerosene cut.
Maximum blend ratio by production pathway
| Production pathway | Max blend | Clause |
|---|---|---|
| SIP, synthesized iso-paraffins from fermented sugars | 10% | Annex A3 |
| HC-HEFA-SPK, from algal hydrocarbons | 10% | Annex A7 |
| FT-SPK, Fischer-Tropsch synthetic paraffinic kerosene | 50% | Annex A1 |
| HEFA-SPK, hydroprocessed esters and fatty acids | 50% | Annex A2 |
| FT-SPK/A, Fischer-Tropsch with aromatics | 50% | Annex A4 |
| ATJ-SPK, alcohol-to-jet | 50% | Annex A5 |
| CHJ, catalytic hydrothermolysis jet | 50% | Annex A6 |
Blend limits are set by the fuel specification, not by the blend's measured properties. A blend at or below these ratios is re-certified against the conventional jet fuel specification and handled as a drop-in fuel.
Fuels
Values are individual data points reproduced for reference with attribution to the issuing body. They are not a substitute for the standard itself. 3Y Energy is not affiliated with the issuing organisations. Obtain the full document from the source linked above.