Production of renewable biofuels
View Patent ↗Renewable fuels are produced in commercial quantities and with enhanced efficiency by integrating a bio-oil production system with a conventional petroleum refinery so that the bio-oil is co-processed with a petroleum-derived stream in the refinery. The techniques used to integrate the bio-oil production system and conventional petroleum refineries are selected based on the quality of the bio-oil and the desired product slate from the refinery.
1. A process for producing a renewable fuel, said process comprising:
(a) providing one or more bio-oils selected from the group consisting of a high stability bio-oil, an intermediate-stability bio-oil, and a low-stability bio-oil, wherein said high stability bio-oil has a stability parameter of less than 30 centipoise per hour (cp/h), said intermediate-stability bio-oil has a stability parameter in the range of 30 to 75 cp/h, and said low stability bio-oil has a stability parameter greater than 75 cp/h; and
(b) processing at least one of said bio-oils in a petroleum refinery according to one or more of the following methods (i) through (vi)—
(i) combining at least a portion of said high-stability bio-oil with a first petroleum-derived stream of said petroleum refinery to thereby form a first combined stream, hydrotreating said first combined stream to thereby produce a first hydrotreated stream, and fractionating said first hydrotreated stream;
(ii) combining at least a portion of said high-stability, bio-oil with a second petroleum-derived stream of said petroleum refinery to thereby form a second combined stream, catalytically cracking said second combined stream to thereby produce a second cracked stream, and fractionating said second cracked stream;
(iii) combining at least a portion of said intermediate-stability bio-oil with a third petroleum-derived stream of said petroleum refinery to thereby form a third combined stream, hydrotreating said third combined stream to thereby produce a third hydrotreated stream, catalytically cracking at least a portion of said third hydrotreated stream to thereby produce a third cracked stream, and fractionating said third cracked stream;
(iv) combining at least a portion of said intermediate-stability bio-oil with a fourth petroleum-derived stream of said petroleum refinery to thereby form a fourth combined stream, hydrotreating said fourth combined stream to thereby produce a fourth hydrotreated stream, thermally cracking at least a portion of said fourth hydrotreated stream to thereby produce a fourth cracked stream, and fractionating said fourth cracked stream;
(v) combining at least a portion of said low-stability bio-oil with a fifth petroleum-derived stream of said petroleum refinery to thereby form a fifth combined stream, thermally cracking at least a portion of said fifth combined stream to thereby produce a fifth cracked stream, and fractionating said fifth cracked stream; and/or
(vi) combining at least a portion of said low-stability bio-oil with a sixth petroleum-derived stream of said petroleum refinery to thereby form a sixth combined stream, fractionating at least a portion of said sixth combined stream into at least a sixth heavy bio-fraction and a sixth light bio-fraction, hydrotreating at least a portion of said sixth light bio-fraction to thereby produce a sixth hydrotreated bio-fraction, and thermally cracking at least a portion of said sixth heavy bio-fraction to thereby produce a sixth thermally cracked bio-fraction.
2. The process of claim 1 wherein said high-stability bio-oil has an oxygen content of less than 15 weight percent, said intermediate-stability bio-oil has an oxygen content in the range of from 15 to 18 weight percent, and said low-stability bio-oil has an oxygen content greater than 18 weight percent.
3. The process of claim 1 wherein said providing of step (a) includes thermochemically converting biomass in a conversion reactor, wherein said biomass comprises lignocellulose.
4. The process of claim 2 wherein said converting of said biomass is by fast pyrolysis and wherein said conversion reactor is a riser reactor.
5. The process of claim 1 wherein said first, second, third, fourth, fifth, and/or sixth petroleum-derived streams are each separately selected from the group consisting of virgin gasoil/diesel, light cycle oil (ECO), light catalytic-cycle oil (LCCO), atmospheric residue (AR), deasphalted oil (DAO), heavy crude oil (HCO), heavy catalytic-cycle oil (HCCO), vacuum gas oil (VGO), vacuum residue (VR), and combinations thereof.
6. The process of claim 1 wherein each of said fractionating of methods (i), (ii), (iii), (iv), and/or (v) separately produce at least one product stream selected from the group consisting of bio-gasoline, a bio-jet fuel, a bio-diesel, a bio-fuel-oil, and combinations thereof wherein at least 75 weight percent of said bio-gasoline has a boiling point in the range of 40 to 215° C., wherein at least 75 weight percent of said bio-jet fuel has a boiling point in the range of 175 to 325° C., wherein at least 75 weight percent of said bio-diesel has a boiling point, in the range of 250 to 350° C., and wherein at least 75 weight percent of said bio-fuel-oil has a boiling point in the range of 325 to 600° C.
7. The process of claim 1 wherein step (a) provides at east said high-stability bio-oil, wherein step (b) comprises method (i) and/or (ii).
8. The process of claim 7 wherein step (b) comprises method (i).
9. The process of claim 8 wherein said hydrotreating of method (i) is carried out a diesel hydrotreating unit of said petroleum refinery.
10. The process of claim 7 wherein step (b) comprises method (ii).
11. The process of claim 10 wherein said catalytic cracking of method (ii) is carried out in a resid fluid catalytic cracking (RFCC) unit or in a fluid catalytic cracking (FCC) unit of said petroleum refinery.
12. The process of claim 7 wherein said first and/or second petroleum-derived streams comprise virgin gasoil/diesel, light cycle oil (LCO), light catalytic-cycle oil (LCCO), atmospheric residue (AR), deasphalted oil (DAO), vacuum as oil (VGO), heavy catalytic-cycle oil (HCCO), and, or vacuum residue (VR).
13. The process of claim 1 wherein step (a) provides at least said intermediate-stability bio-oil, wherein step (b) comprises method (iii) and/or (iv).
14. The process of claim 13 wherein step (b) comprises method (iii).
15. The process of claim 14 wherein said catalytic cracking of method (iii) is carried out in a fluid catalytic cracking (FCC) unit of said petroleum refinery.
16. The process of claim 13 wherein step (b) comprises method (iv).
17. The process of claim 16 wherein said thermally cracking of method (iv) is carried out in a hydrocracking unit of said petroleum refinery.
18. The process of claim 13 wherein said third and/or fourth petroleum-derived streams are selected from the group consisting of light cycle oil (LCO), and/or light conversion-cycle oil (LCCO), deasphalted oil (DAO), vacuum gas oil (VGO), heavy catalytic-cycle oil (HCCO), and combinations thereof.
19. The process of claim 1 wherein step (a) provides at least said low-stability bio-oil, wherein step (b) comprises method (v) and/or (vi).
20. The process of claim 19 wherein step (b) comprises method (v).
21. The process of claim 20 wherein said thermally cracking of method (v) is carried out in a coker unit of said petroleum refinery.
22. The process of claim 19 wherein step (b) comprises method (vi).
23. The process of claim 22 wherein said thermally cracking of method (vi) is carried out in a coker unit of said petroleum refinery.
24. The process of claim 22 wherein said fractionating of method (vi) occurs in a coker fractionator.
25. The process of claim 19 wherein said fifth and/or sixth petroleum-derived stream is selected from the group consisting of light cycle oil (LCO), and/or light conversion-cycle oil (LCCO), atmospheric residue (AR), deasphalted oil (DAO), vacuum residue (VR), and combinations thereof.