18 April 2016 – Gevo, Inc. announced that ASTM International approved a new sustainable alternative jet fuel pathway – Alcohol-to-Jet Synthetic Paraffinic Kerosene (ATJ-SPK) – under ASTM D7566 (Standard Specification for Aviation Turbine Fuel Containing Synthesized Hydrocarbons) on April 1, 2016. The ATJ-SPK fuel is initially limited to use of isobutanol as a feedstock, although the specification outlines a pathway for inclusion of any C2-C5 alcohol feedstocks as additional data is generated by such producers. The alcohol feedstocks are subsequently processed through dehydration, oligomerization, hydrogenation, and fractionation to achieve the properties of an acceptable jet fuel blend stock. ATJ-SPK is now the 5th approved synthetic blending component approved by the industry.
As with the previous four approved ASTM D7566 fuel pathways, ATJ-SPK must be blended with petroleum-based jet fuel before it may be reclassified as a drop-in D1655 jet fuel. The fuel is limited to a 30% maximum blend level.
CAAFI wishes to congratulate Gevo on achieving this milestone, and we look forward to additional Gevo engagement with the aviation enterprise, leading to impactful commercialization opportunities. Find the revised ASTM D7566 specification and the U.S. Federal Aviation Administration announcement here and here, respectively.
CAAFI also looks forward to recurring approvals of additional D7566 pathways over the next several years, eventually enabling a very broad group of technologies and feedstocks to be used for the production of sustainable alternative jet fuel world-wide, and in meaningful quantities to help the aviation industry meets its carbon neutral growth goals.