CN-122012141-A - Method for producing aviation fuel

Abstract

The present invention provides a method of producing an aviation fuel comprising a step of preparing a feed, a step of introducing the feed into a Fischer-Tropsch (FT) reaction to produce an FT synthetic oil, wherein the FT synthetic oil comprises a first fraction and a kerosene fraction, the first fraction being a fraction having a boiling point lower than the kerosene boiling point range, the total content of the first fraction and the kerosene fraction in the FT synthetic oil being 85wt% or more, a step of converting the first fraction to a second fraction having a boiling point higher than that of the first fraction, and a step of recovering an aviation fuel from the kerosene fraction and the second fraction.

Inventors

• LI CHENGYU
• ZHANG DONGSHI
• CAO CHENGXUAN
• LI CHANGKUI
• LI HAOTING
• LIN YUNZHI
• JIN XIANYING
• Jin Yinjing
• JIN RUNHUA
• Pu Jiqin
• LI HUIXIU

Assignees

• SK新技术株式会社

Dates

Publication Date

20260512

Application Date

20250923

Priority Date

20241111

Claims (14)

1. 1. A method of preparing an aviation fuel, wherein the method of preparing an aviation fuel comprises: A step of preparing a feed; A step of introducing the feed into a Fischer-Tropsch (FT) reaction to produce FT synthetic oil, wherein the FT synthetic oil comprises a first fraction and a kerosene fraction, the first fraction being a fraction having a boiling point lower than the boiling point range of kerosene, the total content of the first fraction and the kerosene fraction in the FT synthetic oil being 85% by weight or more; A high boiling step of converting the first fraction into a second fraction having a boiling point higher than that of the first fraction, and Recovering aviation fuel from the kerosene fraction and the second fraction.
2. 2. The method of producing aviation fuel of claim 1, wherein the feed is syngas.
3. 3. The method of producing aviation fuel according to claim 2, wherein the synthesis gas is derived from waste, biomass, animal fat, vegetable fat, waste edible oil or a combination thereof, or comprises CO derived from captured carbon dioxide and green hydrogen.
4. 4. The method of producing aviation fuel according to claim 1, wherein the fischer-tropsch (FT) reaction is carried out in the presence of a catalyst at a temperature of 180-400 ℃, a pressure of 10-100 bar and a molar ratio of H 2 /CO of 1 to 10.
5. 5. The method of making an aviation fuel of claim 4, wherein the catalyst comprises Co, fe, ni, ru or a combination thereof.
6. 6. The method of making an aviation fuel of claim 5, wherein the catalyst further comprises Y, ce, la, W, mo or a combination thereof as a co-catalyst.
7. 7. The method for producing aviation fuel according to claim 1, wherein the first fraction is a naphtha fraction.
8. 8. The method for producing aviation fuel according to claim 1, wherein the content of olefins in the first fraction is 40% by weight or more.
9. 9. The method for producing aviation fuel according to claim 1, wherein the high boiling step is performed in the presence of a catalyst at a temperature of 100-300 ℃, a pressure of 1-100 bar and a Liquid Hourly Space Velocity (LHSV) of 0.01-2.0h -1 .
10. 10. The method of producing aviation fuel of claim 9, wherein the catalyst is an acid catalyst.
11. 11. The method of producing aviation fuel of claim 10, wherein the acid catalyst comprises a solid acid catalyst, a liquid acid catalyst, or a combination thereof, The solid acid catalyst comprises zeolite, clay, solid phosphate, ion exchange resin, amorphous silica-alumina, mesoporous silicate, or a combination thereof, The liquid acid catalyst comprises sulfuric acid, hydrofluoric acid, an ionic liquid, or a combination thereof.
12. 12. The method of producing aviation fuel of claim 1, wherein the method comprises the step of introducing at least a portion of the second fraction, at least a portion of the kerosene fraction, or a combination thereof into the hydrogenation reaction to produce a hydrogenation reaction product, The recovering step includes the step of recovering aviation fuel from the hydrogenation reaction product.
13. 13. The method of producing aviation fuel of claim 12, wherein the hydrogenation reaction comprises at least one of a hydroisomerization reaction and a hydrocracking reaction.
14. 14. The method for producing aviation fuel of claim 1, wherein the FT synthesis oil further comprises a diesel + fraction, The process further comprises the step of introducing at least a portion of the diesel + fraction into the hydrogenation reaction.

Description

Method for producing aviation fuel Technical Field The invention relates to a method for preparing aviation fuel. Background Synthetic fuels (SYNTHETIC FUEL or synfuel) are generally defined as hydrocarbons produced from synthesis gas, which is a mixture of carbon monoxide and hydrogen, by a series of chemical reactions for the purpose of synthesizing fuels, as distinguished from hydrocarbons distilled from crude oil and selected. Among reactions for synthesizing liquid hydrocarbons from synthesis gas using catalytic reactions, the fischer-tropsch (FT) reaction is a representative reaction. Aviation fuel is fuel for aircraft engines. Aviation fuels do not differ much in composition from kerosene and are typically prepared by mixing various additives in the kerosene fraction. In particular, aviation fuels are produced by processing kerosene which is less volatile. Sustainable aviation fuel (sustainable aviation fuel, SAF) refers to aviation fuels made from sustainable and renewable raw materials. The raw material may be a raw material of biological origin such as seaweed, animal and plant, edible oil, etc., or may be a synthetic raw material prepared by using carbon dioxide in air, hydrogen of water origin, etc. SAF can replace the prior aviation fuel without modifying the prior aircraft. SAF has the advantage of reducing carbon emissions by up to 80% compared to previous aviation fuels prepared on the basis of fossil resources such as petroleum, coal, etc. SAF has been attracting attention not only from the viewpoints of exhaustion of existing fossil resources and increase in crude oil prices, but also from the viewpoints of prevention of global warming and reduction of carbon dioxide emissions. [ Prior Art literature ] [ Patent literature ] (Patent document 1) US2010/0108568A1 Disclosure of Invention First, the technical problem to be solved According to one aspect of the present invention, there can be provided a method for producing an aviation fuel capable of improving the production yield of the aviation fuel. The method of the present invention can also be applied to a technology for producing Sustainable Aviation Fuel (SAF), and thus can contribute to prevention of global warming by reducing carbon emissions. (II) technical scheme One aspect of the invention is a method of making an aviation fuel comprising the steps of preparing a feed, introducing the feed into a Fischer-Tropsch (FT) reaction to produce an FT synthetic oil (syncrude), wherein the FT synthetic oil comprises a first fraction and a kerosene fraction, the first fraction being a fraction having a boiling point below the kerosene boiling point range, the total content of the first fraction and the kerosene fraction in the FT synthetic oil being 85 wt% or more, converting the first fraction to a second fraction having a boiling point higher than the boiling point of the first fraction, and recovering an aviation fuel from the kerosene fraction and the second fraction. According to one embodiment (email), the feed is synthesis gas (syngas). According to one embodiment, the synthesis gas is derived from waste, biomass, animal fat, vegetable fat, waste edible oil or a combination thereof, or comprises CO and green hydrogen derived from captured carbon dioxide. According to one embodiment, the FT reaction is carried out in the presence of a catalyst at a temperature of 180-400 ℃, a pressure of 10-100 bar (bar) and a molar ratio of H 2/CO of 1 to 10. According to one embodiment, the catalyst comprises Co, fe, ni, ru or a combination thereof. According to one embodiment, the catalyst further comprises Y, ce, la, W, mo or a combination thereof as a cocatalyst. According to one embodiment, the first fraction is a naphtha fraction. According to one embodiment, the content of olefins in the first fraction is above 40 wt%. According to one embodiment, the high boiling step is carried out in the presence of a catalyst at a temperature of from 100 to 300 ℃, a pressure of from 1 to 100 bar and a Liquid Hourly Space Velocity (LHSV) of from 0.01 to 2.0h -1. According to one embodiment, the catalyst is an acid catalyst. According to one embodiment, the acid catalyst comprises a solid acid catalyst comprising zeolite, clay, solid phosphate, ion exchange resin, amorphous silica-alumina, mesoporous silicate, or a combination thereof, a liquid acid catalyst comprising sulfuric acid, hydrofluoric acid, an ionic liquid, or a combination thereof. According to one embodiment, the method comprises a step (upgrading step) of introducing at least a portion of the second fraction, at least a portion of the kerosene fraction, or a combination thereof into the hydrogenation reaction to produce a hydrogenation reaction product, the recovering step comprising a step of recovering aviation fuel from the hydrogenation reaction product. According to one embodiment, the hydrogenation reaction comprises at least one of a hydroisomerization (Hydro-isomerization) reaction and a