System and methods for renewable fuels

Patent metadata

Field	Value
Publication number	US-11976244-B2
Application number	US-202218064136-A
Country	US
Kind code	B2
Filing date	Dec 9, 2022
Priority date	Dec 13, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A method may include: hydropyrolyzing a bio feedstock in a hydropyrolysis unit to produce at least a hydropyrolysis oil; introducing at least a portion of the hydropyrolysis oil with a hydrocarbon co-feed into a fluidized catalytic cracking unit; and cracking the hydropyrolysis oil in the fluidized catalytic cracking unit to produce at least fuel range hydrocarbons.

First claim

The invention claimed is:

1. A method comprising:
hydropyrolyzing a bio feedstock in a hydropyrolysis unit to produce at least a hydropyrolysis oil, wherein the hydropyrolysis oil has an oxygen content more than 20 wt. % on a dry basis, wherein the hydropyrolysis unit comprises a fluidized bed reactor comprising a hydropyrolysis catalyst, wherein the bio feedstock comprises lignocellulosic biomass, and wherein the hydropyrolysis unit is operated at a pressure in a range of about 0.1 MPa to about 1 MPa;
introducing a feed mixture comprising at least a portion of the hydropyrolysis oil and a hydrocarbon co-feed into a fluidized catalytic cracking unit, wherein the feed mixture to the fluidized catalytic cracking unit comprises the hydropyrolysis oil in an amount of about 5 wt. % to about 15 wt. %; and
cracking the hydropyrolysis oil in the fluidized catalytic cracking unit to produce at least fuel range hydrocarbons.

2. The method of claim 1 wherein the bio feedstock comprises oxygenated compounds and wherein the hydropyrolysis oil has an oxygen content less than 30% on dry basis.

3. The method of claim 1 wherein the fluidized bed reactor is a bubbling fluidized bed reactor.

4. The method of claim 3 wherein the hydropyrolysis catalyst comprises NiMo/MgAl 2 O 4 .

5. The method of claim 1 wherein the hydropyrolysis unit is operated at a temperature in a range of about 300° C. to about 600° C.

6. The method of claim 1 wherein the hydrocarbon co-feed comprises at least one hydrocarbon co-feed selected from the group consisting of vacuum gas oil, heavy gas oil, atmospheric residue, vacuum residue, and combinations thereof.

7. The method of claim 1 wherein the fuel range hydrocarbons comprise gasoline range hydrocarbons with carbon numbers from about C4-C12 as determined by ASTM D4814.

8. The method of claim 1 wherein the fuel range hydrocarbons comprise jet range hydrocarbons with carbon numbers from about C9-C16 as determined by ASTM D1655.

9. The method of claim 1 wherein the fuel range hydrocarbons comprise diesel range hydrocarbons with carbon numbers from about C12-C20 as determined by ASTM D975.

10. A method comprising:
hydropyrolyzing a bio feedstock with hydrogen in a hydropyrolysis unit to produce at least a hydropyrolysis oil, wherein the bio feedstock comprises lignocellulosic biomass, wherein the hydropyrolysis unit is operated at a pressure in a range of about 0.1 MPa to about 1 MPa, wherein the hydropyrolysis oil has an oxygen content more than 20 wt. % on a dry basis, and wherein the hydropyrolysis unit comprises a fluidized bed reactor comprising a hydropyrolysis catalyst;
introducing a feed mixture to a fluidized catalytic cracking unit, wherein the feed comprises the hydropyrolysis oil and a hydrocarbon-cofeed, wherein the hydropyrolysis oil is present in the feed mixture in an amount of about 10 wt. % to about 15 wt. %; and
cracking the hydropyrolysis oil in the fluidized catalytic cracking unit to produce at least fuel range hydrocarbons.

11. The method of claim 1 wherein the fluidized bed reactor is a bubbling fluidized bed reactor.

12. The method of claim 11 wherein the hydropyrolysis catalyst comprises NiMo/MgAl 2 O 4 .

13. The method of claim 10 wherein hydrogen for the hydropyrolyzing is generated by steam reforming of light hydrocarbons.

14. The method of claim 10 wherein the hydropyrolysis unit is operated at a temperature in a range of about 300° C. to about 600° C.

15. The method of claim 10 wherein the hydrocarbon co-feed comprises at least one hydrocarbon co-feed selected from the group consisting of vacuum gas oil, heavy gas oil, atmospheric residue, vacuum residue, and combinations thereof.

16. A method comprising:
hydropyrolyzing a bio feedstock in a hydropyrolysis unit to produce at least a hydropyrolysis oil, wherein the hydropyrolysis oil has an oxygen content between about 20 wt. % and 30 wt. % on a dry basis, wherein the hydropyrolysis unit is operated at a pressure in a range of about 0.1 MPa to about 1 MPa, wherein the hydropyrolysis unit comprises a fluidized bed reactor comprising a hydropyrolysis catalyst, and wherein the bio feedstock comprises lignocellulosic biomass;
introducing a feed mixture comprising at least a portion of the hydropyrolysis oil and a hydrocarbon co-feed into a fluidized catalytic cracking unit, wherein the feed mixture to the fluidized catalytic cracking unit comprises the hydropyrolysis oil in an amount of about 5 wt. % to about 15 wt. %; and
cracking the hydropyrolysis oil in the fluidized catalytic cracking unit to produce at least fuel range hydrocarbons.

17. The method of claim 16 , wherein the hydrocarbon co-feed comprises at least one hydrocarbon co-feed selected from the group consisting of vacuum gas oil, heavy gas oil, atmospheric residue, vacuum residue, and combinations thereof.

18. The method of claim 16 , wherein the hydropyrolysis unit comprises a bubbling fluidized bed reactor comprising a hydropyrolysis catalyst.

Assignees

• Exxonmobil Technology & Engineering Company

Inventors

• Xu Xiaochun
• Fang Yunming
• Zhao Yudi

Classifications

• C10G69/04 Primary

  including at least one step of catalytic cracking in the absence of hydrogen · CPC title

• C10G1/06 Primary

  by destructive hydrogenation · CPC title

• C10G3/40

  Thermal non-catalytic treatment · CPC title

• C10G3/52

  Hydrogen in a special composition or from a special source · CPC title

• C10G3/60

  Controlling or regulating the processes · CPC title