Method and manufacturing apparatus for manufacturing aviation fuel from waste plastic pyrolysis oil

Patent metadata

Field	Value
Publication number	US-2025179371-A1
Application number	US-202318842045-A
Country	US
Kind code	A1
Filing date	Mar 9, 2023
Priority date	Mar 17, 2022
Publication date	Jun 5, 2025
Grant date	—

Abstract

The present disclosure provides a method for producing aviation fuel, the method including: a first step of subjecting waste plastic pyrolysis oil to an olefin migration reaction; a second step of subjecting a product obtained in the first step to an olefin branching reaction; a third step of hydrotreating a product obtained in the second step in the presence of a hydrotreating catalyst; and a fourth step of hydrocracking a product obtained in the third step in the presence of a hydrocracking catalyst.

First claim

1 . A method for producing aviation fuel, the method comprising:
a first operation of subjecting waste plastic pyrolysis oil to an olefin migration reaction; a second operation of subjecting a product obtained in the first operation to an olefin branching reaction; a third operation of hydrotreating a product obtained in the second operation in the presence of a hydrotreating catalyst; and a fourth opertion of hydrocracking a product obtained in the third operation in the presence of a hydrocracking catalyst.

2 . The method of claim 1 , wherein the first operation is performed in the presence of a weak acid site catalyst, and the second operation is performed in the presence of a catalyst of zeolite having a one-dimensional pore structure.

3 . The method of claim 2 , wherein the weak acid site catalyst includes a titanium oxide catalyst.

4 . The method of claim 2 , wherein a weight ratio of the weak acid site catalyst to the catalyst of zeolite having a one-dimensional pore structure is 60:40 to 90:10.

5 . The method of claim 1 , wherein the hydrotreating catalyst in the third operation is a catalyst in which an active metal including one or two or more selected from molybdenum, nickel, cobalt, and tungsten is supported on a support.

6 . The method of claim 1 , wherein the hydrocracking catalyst in the fourth operation is a catalyst in which an active metal including one or two or more selected from molybdenum, nickel, cobalt, and tungsten is supported on zeolite.

7 . The method of claim 1 , wherein the produced aviation fuel has a freezing point of −45° C. or lower and a yield of 75% or more.

8 . The method of claim 1 , wherein the produced aviation fuel has a chlorine content of 10 ppm or less and a nitrogen content of 10 ppm or less.

9 . The method of claim 1 , wherein the first operation and the second operation are performed at a reaction temperature of higher than 300° C.

10 . The method of claim 1 , wherein the first operation and the second operation are performed under conditions of a reaction pressure of 5 to 70 bar and a gas/oil ratio (GOR) of 100 to 3,000 in an inert atmosphere.

11 . The method of claim 1 , wherein the third operation is performed under conditions of a reaction temperature of lower than 300° C., a reaction pressure of 100 bar or less, and a gas/oil ratio (GOR) of 100 to 3,000 in hydrogen gas.

12 . The method of claim 1 , wherein the fourth operation is performed under conditions of a reaction temperature of higher than 300° C., a reaction pressure of 100 bar or less, and a gas/oil ratio (GOR) of 100 to 3,000 in hydrogen gas.

13 . The method of claim 1 , further comprising a fifth operation of hydrofinishing a product obtained in the fourth operation under conditions of a reaction temperature of higher than 300° C., a reaction pressure of 100 bar or less, and a gas/oil ratio (GOR) of 100 to 3,000 in the presence of a hydrofinishing catalyst.

14 . An apparatus for producing aviation fuel, the apparatus comprising:
a first reactor into which waste plastic pyrolysis oil is introduced and in which an olefin migration reaction and an olefin branching reaction are sequentially performed; a second reactor into which a reaction product and hydrogen gas are introduced from the first reactor and in which hydrotreating is performed in the presence of a hydrotreating catalyst; and a third reactor into which a reaction product and hydrogen gas are introduced from the second reactor and in which hydrocracking is performed in the presence of a hydrocracking catalyst.

15 . The apparatus of claim 14 , wherein the first reactor includes a first zone filled with a weak acid site catalyst, and a second zone filled with a catalyst of zeolite having a one-dimensional pore structure, and the waste plastic pyrolysis oil is refined by sequentially passing through the first zone and the second zone.

16 . The apparatus of claim 14 , wherein the first reactor to the third reactor are fixed bed reactors.

17 . The apparatus of claim 14 , further comprising a fourth reactor into which a reaction product and hydrogen gas are introduced from the third reactor and in which hydrofinishing is performed in the presence of a hydrofinishing catalyst.

Assignees

• Sk Innovation Co Ltd
• Sk Geo Centric Co Ltd

Inventors

• Jeon Heejung
• Kim Okyoun
• Kim Kayoung
• Park Youngmoo
• Lee Minhee
• Lee Jaehwan

Classifications

• C10G2400/08

  Jet fuel · CPC title

• C10G2300/70

  Catalyst aspects · CPC title

• C10G2300/4025

  Yield · CPC title

• C10G2300/4012

  Pressure · CPC title

• C10G2300/4006

  Temperature · CPC title