| CPC C10G 3/44 (2013.01) [B01J 29/74 (2013.01); B01J 35/64 (2024.01); C10G 3/50 (2013.01); C10G 45/64 (2013.01); C10G 2300/1011 (2013.01); C10G 2300/201 (2013.01); C10G 2400/08 (2013.01)] | 17 Claims |
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1. A method for producing renewable aviation fuel or components thereto, the method comprising the following steps:
a) providing a renewable feedstock,
b) pre-treating the renewable feedstock by reducing the amount of impurities therein not to include: more than 10 w-ppm alkali metal and alkaline earth metal impurities, calculated as elemental alkaline and alkaline earth metals; more than 10 w-ppm other metals, calculated as elemental metals; more than 1000 w-ppm nitrogen containing impurities, calculated as elemental nitrogen; more than 30 w-ppm phosphorus containing impurities, calculated as elemental phosphorus; more than 5 w-ppm silicon containing impurities, calculated as elemental silicon wherein the pre-treating is selected from treating with mineral acids, degumming, treating with hydrogen, liquefying, heat treating, deodorizing, and bleaching; to produce a pre-treated feedstock,
c) subjecting the pre-treated feedstock to hydrodeoxygenation reaction conditions to produce a hydrodeoxygenated stream, wherein the hydrodeoxygenation reaction conditions comprise one or more of:
a. a temperature in the range from 250° C. to 400° C.,
b. a pressure in the range from 10 bar to 200 bar,
c. a WHSV in the range from 0.25 h−1 to 3 h−1,
d. a H2 flow of 350 to 1500 N-L H2/L feed, and
e. a hydrodeoxygenation catalyst selected from Pd, Pt, Ni, Co, Mo, Ru, Rh, and W or any combination thereof, on a support
to produce hydrodeoxygenated stream,
d) subjecting the hydrodeoxygenated stream to a gas-liquid separation thereby producing a gaseous stream and a hydrodeoxygenated liquid stream,
e) subjecting the hydrodeoxygenated liquid stream to hydroisomerization reaction in a presence of a hydroisomerisation catalyst, comprising a noble metal, a 12-member ring ZSM-12 zeolite with pore size below 0.7 nm acidity from 180 μmol/g to 500 μmol/g measured with NH3-TPD method, aluminum content from 0.1 wt.-% to 1.5 wt.-%, Si to Al ratio from 30 to 60, and the ratio of Bronsted acid sites to the Lewis acid sites from 1.7 to 4, on a support, and hydrogen in a pressure in the range from 30 bar to 40 bar, at a temperature in a range from 270° C. to 310° C. to produce a hydroisomerized stream,
f) optionally subjecting the hydroisomerized stream to stabilization, to produce a stabilized hydroisomerized stream, and
g) separating from the hydroisomerized stream, or the stabilized hydroisomerized stream, the renewable aviation fuel, or components thereto, wherein the renewable aviation fuel or components thereto comprises renewable C5-C9 hydrocarbons suitable for aviation gasoline or components thereto, and renewable C10-C16 hydrocarbons suitable for jet fuel or components thereto.
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