US 12,291,683 B1
Processes and systems for production of sustainable aviation fuel from syngas via mixed alcohols
Richard Denham Ridley, Jr., Berthoud, CO (US); Geradette Giardino, Arvada, CO (US); Michael Emory Pardun, Denver, CO (US); Robert Mulverhill, Denver, CO (US); and Frans L. Plantenga, Hoevelaken (NL)
Assigned to Standard Alcohol Company of America, Inc., Denver, CO (US)
Filed by Standard Alcohol Company of America, Inc., Denver, CO (US)
Filed on Oct. 9, 2024, as Appl. No. 18/910,667.
Claims priority of provisional application 63/670,532, filed on Jul. 12, 2024.
Claims priority of provisional application 63/543,648, filed on Oct. 11, 2023.
Int. Cl. C10L 1/08 (2006.01)
CPC C10L 1/08 (2013.01) [C10L 2200/0469 (2013.01); C10L 2270/04 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A process for producing aviation fuel from syngas, said process comprising:
(a) providing a starting syngas stream comprising H2 and CO;
(b) purifying said syngas feed stream to generate a clean syngas stream;
(c) optionally, adjusting said H2/CO ratio of said starting syngas stream or said clean syngas stream;
(d) feeding said clean syngas stream to an alcohol-synthesis reactor operated at effective alcohol-synthesis conditions and in the presence of an alcohol-synthesis catalyst, to catalytically convert at least a portion of said H2 and said CO to a C1-C10 mixed-alcohol stream and a reactor off-gas;
(e) optionally, purifying said C1-C10 mixed-alcohol stream to generate a clean C1-C10 mixed-alcohol stream;
(f) feeding said C1-C10 mixed-alcohol stream or, if step (e) is conducted, said clean C1-C10 mixed-alcohol stream to a dehydration reactor operated at effective alcohol-dehydration conditions and in the presence of a dehydration catalyst, to catalytically convert at least a portion of said C1-C10 mixed alcohols to C2-C10 mixed olefins;
(g) sequentially following step (f), feeding said C2-C10 mixed olefins to an oligomerization reactor operated at effective oligomerization conditions and in the presence of an oligomerization catalyst, to catalytically convert at least a portion of said C2-C10 mixed olefins to a hydrocarbon stream comprising C5-C16 mixed hydrocarbons;
(h) optionally, separating and removing light or heavy hydrocarbons that are not within the C5-C16 range, from said hydrocarbon stream;
(i) feeding said C5-C16 mixed hydrocarbons and hydrogen to a hydrogenation reactor operated at effective hydrogenation conditions and in the presence of a hydrogenation catalyst, to catalytically hydrogenate at least some C═C double bonds within said C5-C16 mixed hydrocarbons, thereby generating stabilized C5-C16 mixed hydrocarbons; and
(j) recovering said stabilized C5-C16 mixed hydrocarbons as aviation fuel.