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AssigneeGevo, Inc.
InventorsJonathan O. Smith, Madeline Sjodin, Austin Vaillancourt, Paul Starkey, Steve Donen, Michelle Shebowich
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The present disclosure provides methods and materials for oligomerization of lower olefins (e.g., C2-C8) to transportations fuels including diesel and/or jet fuel. The oligomerization employs, in certain embodiments, tungstated zirconium catalysts. Surprisingly, the oligomerizations proceed smoothly in high yields and exhibit little to no sensitivity to the presence of significant amounts of oxygenates (e.g., water, lower alcohols such as C2-C8 alcohols) in the feed stream. Accordingly, the present disclosure is uniquely suited to the production of fuels derived from bio-based alcohols, wherein olefins produced from such bio-based alcohols typically contain high levels of oxygenates.
A process for converting one or more C2-C8 linear or branched olefins to jet and/or diesel fuel, comprising contacting a feed stream comprising the one or more C2-C8 linear or branched olefins with a first catalyst and a second catalyst to afford a mixture comprising at least 70 wt % C12 or greater alkenes, wherein the first catalyst comprises tungstted zirconium, molybdenum zirconium, or a combination thereof and the second catalyst comprises an acidic ZSM-5 catalyst.
Dependencies are inferred from the claim text.