Low sulfur fuel oil blends for paraffinic resid stability and associated methods
AssigneeMarathon Petroleum Company LP
InventorsMatthew T. Woodchick, V. Elijah Mullins, Peg Broughton
Life of this patent
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Abstract
Low sulfur fuel oil blend compositions and methods of making such blend compositions to increase the stability and compatibility of LSFO blends having paraffinic resids that are blended with distillates and/or cracked stocks of higher asphaltenes and/or aromatics content. In one or more embodiments, distillates and/or cracked stocks that incrementally reduce the initial aromaticity of the distillate or cracked stock with the highest aromaticity are sequentially blended prior to resid addition. Such incremental reduction and sequential blending have been found to provide a resulting low sulfur fuel oil blend that is both compatible and stable.
Claims20
A method of making and distributing a low sulfur marine bunker fuel oil composition that has an increased initial compatibility and longer term stability, the method comprising:
- selecting a resid having an aromatic content of less than about 50% by weight,
- selecting a first slurry oil having an aromatic content of greater than about 70% by weight;
- selecting a second slurry oil having an aromatic content of less than about 70% by weight;
- adding the first slurry oil to a tank;
- adding the second slurry oil to the tank;
- blending the first slurry oil and the second slurry oil together in a tank to define a slurry oil mixture, the slurry oil mixture having a percentage of aromatics less than the aromatic content of the first slurry oil;
- adding the resid into the tank with the slurry oil mixture;
- blending the resid with the slurry oil mixture to define a low sulfur marine bunker fuel oil, the low sulfur marine bunker fuel oil having a sulfur content less than about 0.5% by weight and an aged sediment of less than about 0.1% by weight;
- and
- pumping the low sulfur marine bunker fuel oil from the tank through a pipeline.
A low sulfur marine bunker fuel oil composition that has an increased initial compatibility and longer term stability, the composition comprising:
- a first slurry oil having an aromatic content of greater than about 70% by weight;
- a second slurry oil having an aromatic content of less than about 70% by weight, the second slurry oil and the first slurry oil being blended to define a slurry oil mixture;
- and
- a resid having a paraffinic content of at least 35% by weight and an aromatic content of
- less than about 50% by weight, the resid being added to the slurry oil mixture to define a low sulfur marine bunker fuel oil, the low sulfur marine bunker fuel oil having a sulfur content less than about 0.5% by weight and an aged sediment of less than about 0.1% by weight.
A method of making and distributing a low sulfur marine bunker fuel oil composition that has an increased initial compatibility and longer term stability, the method comprising:
- selecting a resid having a paraffinic content of at least 35% by weight;
- selecting a first slurry oil having an aromatic content of greater than about 65% by weight;
- selecting a second slurry oil having an aromatic content that is between about 1% and about 20% by weight lower than the aromatic content of the first slurry;
- adding the first slurry oil to a tank;
- adding the second slurry oil to the tank;
- blending the first slurry oil and the second slurry oil together in a tank to define a slurry oil mixture, the slurry oil mixture having a percentage of aromatics less than the aromatic content of the first slurry oil;
- adding the resid into the tank with the slurry oil mixture;
- blending the resid with the slurry oil mixture to define a low sulfur marine bunker fuel oil, the low sulfur marine bunker fuel oil having a sulfur content less than about 0.5% by weight and an aged sediment of less than about 0.1% by weight;
- and
- pumping the low sulfur marine bunker fuel oil from the tank through a pipeline.
Dependencies are inferred from the claim text.