ASTM approves 7th annex to sustainable aviation fuel specification D7566
Type of post: NEWS IN BRIEF.
The latest version of the standard ASTM D7566, sustainable
aviation fuel (SAF) specification, adds a seventh annex approving a new pathway
for the production of SAF.
ASTM
D7566 - 20 (updated May 5, 2020) - Standard
Specification for Aviation Turbine Fuel Containing Synthesized Hydrocarbons.
Figure 1. ASTM approves 7th annex to
sustainable aviation fuel specification D7566
The specification D7566 covers the manufacture
of aviation turbine fuel that consists of conventional and synthetic blending
components. The Annex A7 represents the seventh approved pathway for the
production of SAF:
- Annex A1: Fischer-Tropsch Synthetic
Paraffinic Kerosene (FT SPK).
- Annex A2: Hydroprocessed
Esters and Fatty Acids (HEFA SPK).
- Annex A3: Synthesized Iso-Paraffinic (SIP).
- Annex A4: Synthesized Paraffinic Kerosene
plus Aromatics (SPK/A),
- Annex A5: Alcohol-To-Jet
(ATJ).
- Annex A6: Catalytic Hydrothermolysis Jet
(CHJ).
- Annex A7: Hydrocarbon-Hydroprocessed Esters
and Fatty Acids (HC-HEFA SPK).
Annex A7 establishes criteria for the production
and use of a specific type of synthesized paraffinic kerosene from
hydroprocessed hydrocarbons, esters and fatty acids (HC-HEFA-SPK). The standard
provides that HC-HEFA-SPK fuel, which was developed by IHI Corporation, may be
blended at up to 10% by volume with conventional jet fuel. This fuel pathway
was the first to receive expedited review under ASTM’s “fast track” review
process (D4054 Fast Track Annex) and benefitted from guidance from a special
clearinghouse established by the US Federal Aviation Administration (FAA) to
help guide SAF producers through the rigorous assessment and approval process.