Low sulfur marine fuel compositions
Heavy hydrotreated gas oil compositions are provided, along with marine fuel oil compositions and marine gas oil compositions that include a substantial portion of a hydrotreated heavy atmospheric gas oil. The hydrotreated heavy atmospheric gas oil can correspond to a gas oil with a relatively low viscosity and an elevated paraffin content in a narrow boiling range which results in a relatively high cloud point and/or pour point.
1. A method for forming a marine fuel oil composition comprising:
blending 10 wt % to 70 wt % of a first fraction comprising a T10 distillation point of 300° C. or more, a T90 distillation point of 440° C. or less, a kinematic viscosity at 40° C. of 10.5 cSt to 16 cSt, a sulfur content of 0.03 wt % to 0.6 wt %, a pour point of 15° C. or more, a BMCI of 40 or less, and a paraffin content of 22 wt % or more, with
10 wt % to 90 wt % of a second fraction comprising a kinematic viscosity at 50° C. of 14 cSt or more, an estimated cetane number of 25 or less, a pour point of 9° C. or less, a BMCI of 45 or more, and an asphaltenes content of 3.0 wt % or more,
wherein the marine fuel oil composition comprises a sulfur content of 0.1 wt % to 0.6 wt %, a kinematic viscosity at 50° C. of 10 cSt or more, and an estimated cetane number of 20 or more.
2. The method of claim 1 , wherein the second fraction comprises 40 wt % or more of a resid fraction comprising 3.0 wt % or more asphaltenes, and 5 wt % to 30 wt % or less of a fraction comprising a BMCI of 80 or more.
3. The method of claim 2 , wherein the resid fraction comprises a pre-cracker bottoms fraction.
4. The method of claim 1 , wherein the marine fuel oil composition further comprises 10 wt % or more of one or more distillate fractions, or wherein the second fraction comprises 10 wt % or more of one or more distillate fractions, or a combination thereof.
5. The method of claim 1 , wherein the second fraction comprises a sulfur content of 0.6 wt % or more.
6. The method of claim 1 , wherein the marine fuel oil composition comprises 50 wt % or more of the first fraction, or wherein the marine fuel oil composition comprises 50 wt % or more of the second fraction.
7. The method of claim 1 , wherein the first fraction comprises a wax end point of 30° C. to 45° C.; or wherein the first fraction comprises a cetane index of 50 or more; or wherein the first fraction comprises a sulfur content of 0.1 wt % to 0.6 wt %; or wherein the first fraction comprises a viscosity index of 80 or more; or a combination thereof.
8. The method of claim 1 , wherein 40 wt % or more of the paraffins in the first fraction, relative to a weight of paraffins in the first fraction, comprise n-paraffins; or wherein the first fraction comprises a paraffins content of 30 wt % or more; or a combination thereof.
9. The method of claim 1 , wherein the first fraction comprises a kinematic viscosity at 50° C. of 11.5 cSt or less.
10. The method of claim 1 , wherein the first fraction comprises a BMCI of 37 or less, or wherein the first fraction comprises 0.1 wt % or less asphaltenes, or a combination thereof.
11. A marine fuel oil composition comprising:
10 wt % to 70 wt % of a first fraction comprising a T10 distillation point of 300° C. or more, a T90 distillation point of 440° C. or less, a kinematic viscosity at 40° C. of 10.5 cSt to 16 cSt, a sulfur content of 0.03 wt % to 0.6 wt %, a pour point of 15° C. or more, BMCI of 40 or less, and a paraffin content of 22 wt % or more; and
10 wt % to 90 wt % of a second fraction comprising a kinematic viscosity at 50° C. of 14 cSt or more, an estimated cetane number of 25 or less, a pour point of 9° C. or less, a BMCI of 45 or more, and an asphaltenes content of 3.0 wt % or more,
wherein the marine fuel oil composition comprises a sulfur content of 0.1 wt % to 0.6 wt %, a kinematic viscosity at 50° C. of 10 cSt or more, and an estimated cetane number of 20 or more.
12. The marine fuel oil composition of claim 11 , wherein the second fraction comprises 40 wt % or more of a resid fraction comprising 3.0 wt % or more asphaltenes, and 5 wt % to 30 wt % or less of a fraction comprising a BMCI of 80 or more.
13. The marine fuel oil composition of claim 12 , wherein the resid fraction comprises a pre-cracker bottoms fraction.
14. The marine fuel oil composition of claim 11 , wherein the marine fuel oil composition further comprises 10 wt % or more of one or more distillate fractions, or wherein the second fraction comprises 10 wt % or more of one or more distillate fractions, or a combination thereof.
15. The marine fuel oil composition of claim 11 , wherein the second fraction comprises a sulfur content of 0.6 wt % or more.
16. The marine fuel oil composition of claim 11 , wherein the marine fuel oil composition comprises 50 wt % or more of the first fraction, or wherein the marine fuel oil composition comprises 50 wt % or more of the second fraction.
17. The marine fuel oil composition of claim 11 , wherein the first fraction comprises a wax end point of 30° C. to 45° C.; or wherein the first fraction comprises a cetane index of 50 or more; or wherein the first fraction comprises a sulfur content of 0.1 wt % to 0.6 wt %; or wherein the first fraction comprises a viscosity index of 80 or more; or a combination thereof.
18. The marine fuel oil composition of claim 11 , wherein 40 wt % or more of the paraffins in the first fraction, relative to a weight of paraffins in the first fraction, comprise n-paraffins; or wherein the first fraction comprises a paraffins content of 30 wt % or more; or a combination thereof.
19. The marine fuel oil composition of claim 11 , wherein the first fraction comprises a kinematic viscosity at 50° C. of 11.5 cSt or less.
20. The marine fuel oil composition of claim 11 , wherein the first fraction comprises a BMCI of 37 or less, or wherein the first fraction comprises 0.1 wt % or less asphaltenes, or a combination thereof.