Heavy marine fuel compositions

A low sulfur hydrocarbon fuel composition consisting essentially of:

• a majority by volume of a hydrodemetallized and hydrodesulfurized, high sulfur residual marine fuel oil that has been hydroprocessed under reaction conditions of hydrodemetallization and hydrodesulfurization, but not reaction conditions of hydrocracking of more than 10% by total mass balance, and a minority by volume of Diluent Materials, wherein prior to hydroprocessing the high sulfur heavy marine fuel oil is compliant with ISO 8217:
• 2017 as a residual marine fuel oil, but Environmental Contaminants have a concentration greater than 0.5% wt., wherein Environmental Contaminates are selected from the group consisting of:
• a sulfur, vanadium, nickel, iron, aluminum and silicon;
• and wherein the low sulfur heavy marine fuel composition is compliant with ISO 8217:2017 as a residual marine fuel oil and has an Environmental Contaminates concentration less than 0.5 wt %;
• and wherein the Diluent Materials are selected from the group consisting of:
• hydrocarbon materials;
• non-hydrocarbon materials;
• and, solid materials and combinations thereof.

A heavy marine fuel oil product that is ISO 8217:

• 2017 Table 2 compliant as a residual marine fuel, and is of merchantable quality as a heavy marine fuel oil, and has an Environmental Contaminates concentration of less than 0.5 wt %, and wherein the Environmental Contaminants are selected from the group consisting of:
• a sulfur;
• vanadium, nickel, iron, aluminum and silicon and combinations thereof, and wherein the heavy marine fuel oil product has been hydrodemetallized and hydrodesulfurized, but has not been to substantially hydrocracked, said heavy marine fuel oil product being produced by a process comprising:
• a) combining a quantity of the heavy marine fuel oil, wherein the heavy marine fuel oil has bulk properties compliant with ISO 8217:2017 Table 2 as a residual marine fuel oil, but Environmental Contaminants have a concentration greater than 0.5% wt. and wherein the Environmental Contaminants are selected from the group consisting of:
• a sulfur:
• vanadium, nickel, iron, aluminum and silicon and combinations thereof, with an amount of an Activating Gas to form a Feedstock Mixture;
• b) bringing the Feedstock Mixture up to process conditions of temperature and pressure to form a heated and pressurized Feedstock Mixture;
• c) contacting said heated and pressurized Feedstock Mixture in at least one reactor vessel configured to utilize one or more catalyst systems selected from the group consisting of:
• an ebulliated bed supported transition metal heterogeneous catalyst, a fixed bed supported transition metal heterogeneous catalyst, and a combination of ebulliated bed supported transition metal heterogeneous catalysts and fixed bed supported transition metal heterogeneous catalysts, wherein said contacting takes place under reactive process conditions of hydrodemetallization and hydrodesulfurization, and hydrocracking less than 10% wt of the total mass balance, to form a Process Mixture, wherein the Process Mixture is comprised of a liquid hydrocarbon component, a by-product hydrocarbon component, a bulk gaseous component and a residual gas component;
• d) removing the Process Mixture from being in contact with the one or more catalyst systems in the at least one reactor vessel and sending the Process Mixture via fluid communication from the at least one reactor vessel to at least one second vessel and separating the liquid hydrocarbon component, the by-product hydrocarbon component and the residual gas component from the bulk gaseous component of the Process Mixture;
• e) sending by fluid communication the liquid hydrocarbon component, the by-product hydrocarbon component and the residual gas component from the bulk gaseous component of the Process Mixture from the at least one second vessel to at least one third vessel, and separating the liquid hydrocarbon component of the Process Mixture from the residual gaseous components and the by-product hydrocarbon components to form said heavy marine fuel oil product;
• and,
• f) discharging the heavy marine fuel oil product from said at least one third vessel.