Fuel compositions from light tight oils and high sulfur fuel oils
Methods are provided to prepare a low sulfur fuel from hydrocarbon sources, such as light tight oil and high sulfur fuel oil, often less desired by conventional refiners, who split crude into a wide range of differing products and may prefer presence of wide ranges (C3 or C5 to C20 or higher) of hydrocarbons. These fuels can be produced by separating feeds into untreated and treated streams, and then recombining them. Such fuels can also be formulated by combinations of light, middle and heavy range constituents in a selected manner as claimed. Not only low in sulfur, the fuels of this invention are also low in nitrogen and essentially metals free. Fuel use applications include on-board large marine transport vessels but also on-shore for large land based combustion gas turbines, boilers, fired heaters and transport vehicles and trains.
1. A formulated combination useful as a fuel characterized in that it is formed
by combining a range of hydrocarbons of (L)+(M)+(H) and the resulting combination is from 30% to 70% by volume of (M) range constituents determined, based on 100 volume percent total, as follows:
(a) (L)%+(M)%+(H)%=100%, and
(b) 100%−(M)%=(L)%+(H)%, wherein
100
%
-
(
2
M
)
%
=
(
L
)
%
2
+
(
H
)
%
(
1
)
for 100% minus (M)%, remainder is substantially equal parts (L)% and (H)% as (L)%=(H)%=(100%−(M)%)/2), or
(2) 100%−(M)%=(L)%+(H)%,
for 100% minus (M)%, remainder is (L)% and (H)% at (L)%/(H)% in ratio of 0.9/1 to 1/0.9, or ratio of 47.4%/52.6% to 52.6%/47.24%,
and final combination density is within 820 to 880 Kg/M3 at 15° C., total sulfur is 0.25 wt. % or less and metals are 40 ppmwt or less
(a) wherein (L) comprises components of naphtha and kerosene range materials, which are refined or partially refined, unrefined or extracted and used without being subject to any fractionation, hydrotreating or other treatment process, except optional separation of light gases or water, having an initial boiling point of 38° C. (100° F.) or less having a ninety percent (90%) plus final boiling point of 190° C. (374° F.) to about 205° C. (401° F.), where (L) range components contribute to (L) range bulk density and to final combination density even though individual constituents of (L) may fall outside said combination density range
(b) wherein (M) comprises refined or partially refined petroleum fractions having initial boiling point of about 190° C. (374° F.) to about 205° C. (401° F.) and a 90% plus final boiling point of about 385° C. (725° F.) to 410° C. (770° F.), where (M) range components contribute to (M) range bulk density and to final combination density, even though individual constituents of (M) may fall outside said combination density range, and
(c) wherein (H) comprises refined or partially refined petroleum fractions having initial boiling point of about 385° C. (725° F.) to about 410° C. (770° F.) and a final boiling point of about 815° C. (1499° F.) or less, where final boiling point of (H) is highest boiling point of a component of a stream treated by solvent separation to reduce presence of asphaltenes and metals then recovered and subsequently treated by hydroconversion or hydrotreating to a level to enable addition of such stream to a combination of (L), (M) and (H) to meet final sulfur content for the combination fuel, and where (H) range components contribute to (H) range bulk density and to final combination density even though individual constituents of (H) may fall outside said combination density range.
2. A fuel in accordance with claim 1 wherein (M) ranges from 40% to 60% by volume and the remainder is substantially equal parts of (L) and (H) or is (L)% volume and (H)% volume at (L)%/(H)% in ratio of 0.9/1 to 1/0.9 or ratio of 47.4%/52.6% to 52.6%/47.24%.
3. A fuel in accordance with claim 1 wherein total sulfur is 0.1 wt. % or less, metals are 25 ppmwt or less, said fuel comprising hydrocarbons derived from a combination of light tight oil and hydroconverted high sulfur fuel oil, said fuel having an initial boiling point being the lowest boiling point of any fraction of either said oils at atmospheric distillation conditions and highest boiling point being the highest boiling point of the residual portion of said high sulfur fuel oil which is soluble in a solvent suitable for solvent separation.