Two New Alternative Jet Fuel Production Pathways Approved

May 19, 2020 - CAAFI is happy to announce the latest industry alternative jet fuel (AJF) Production Pathway approvals, and ASTM publication of:

1) A new ASTM D7566 alternative jet fuel production pathway: ASTM D7566 Annex A7 – Hydroprocessed Hydrocarbons (HH-SPK, or HC-HEFA).
This addition describes the hydroprocessing of bio-derived hydrocarbons (as opposed to simply fatty acids or fatty acid esters entailed in HEFA production), for instance those obtained directly from oils (triterpenes) produced by the Botryococcus braunii algae. This task force and research activity was led by IHI Corporation using both the FAA Clearinghouse concept as well as the industry’s D4054 Fast Track provision. The Clearinghouse is intended to streamline the management of the testing and data review of SAF candidates. The University of Dayton Research Institute (URDI) is the project leader for Clearinghouse activity, and is initially funded under ASCENT to support Phase 1 testing and research review. IHI’s timely completion of approval indicates both concepts are impactful, and enable the qualification process for select new pathways to be completed at reduced cost and timeframe. In line with Fast Track provisions, the HH-SPK will initially have a 10% max blending level.

2) The addition of a new type of renewable content for refinery coprocessing of fuels from non-conventional sources: ASTM D1655 Annex A1 addition of Fischer Tropsch biocrude.

The second change is the inclusion of Fischer-Tropsch (FT) biocrude as an allowable feedstock for petroleum co-processing. It’s task force and research activity was led by Fulcrum. As with the earlier approval of lipid co-processing, this co-processing will be limited to a 5% by volume limitation on both feedstock volume and synthesized final product content.

Steve Csonka, CAAFI Executive Director adds that “The industry remains active in improving the fuel qualification process, in participating in new pathway evaluations, and in engaging prospective technology developers and commercialization entities with interest in SAF. All of these activities are important to the long term goals of the industry including introducing additional conversion processes that will enable SAF production from any viable feedstock, worldwide, and continue to offer cost reductions in both plant and equipment as well as operating cost

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