Method for starting up a method for producing kerosene and diesel fuel from hydrocarbon compounds produced by Fischer-Tropsch synthesis.

The start-up method employs catalytic reaction of Fischer-Tropsch synthesis with a synthesis gas for producing a heavy hydrocarbon fraction and a light hydrocarbon fraction, a reduction (RE) reducing a hydrotreatment catalyst by ensuring contact with a gas comprising hydrogen, bringing the heavy hydrocarbon fraction into contact with the hydrotreatment catalyst (DM). During the step for ensuring contact, the temperature (TEMP) of the catalyst is increased to a temperature of between 260 C. and 360 C. Then, (TR) bringing a mixture comprising the heavy hydrocarbon fraction and the light hydrocarbon fraction into contact with the hydrotreatment catalyst is carried out.

Hydrocarbon-containing fluids are provided for use during solvent-assisted hydroprocessing of pyrolysis tar, such as steam cracker tar. The hydrocarbon-containing fluids can be used at any convenient time, such as during start-up of a pyrolysis process when recycled liquid pyrolysis product is not available; when the amount of liquid pyrolysis product available for recycle is not sufficient to maintain desired hydroprocessing conditions; and/or when the changes to the quality of the liquid pyrolysis product reduce the suitability of the recycle stream for use as a utility fluid.

Hydrocarbon-containing fluids are provided for use during solvent-assisted hydroprocessing of pyrolysis tar, such as steam cracker tar. The hydrocarbon-containing fluids can be used at any convenient time, such as during start-up of a pyrolysis process when recycled liquid pyrolysis product is not available; when the amount of liquid pyrolysis product available for recycle is not sufficient to maintain desired hydroprocessing conditions; and/or when the changes to the quality of the liquid pyrolysis product reduce the suitability of the recycle stream for use as a utility fluid.

Methods and apparatuses are provided for hydrotreating hydrocarbons. A method includes heating a start-up oil in a stripper liquid fraction heat exchanger during a start-up period, and heating a reactor with the start-up oil. The start-up oil is discharged from the reactor when the start-up period ends, and a standard operating period begins after the start-up period. A reactor effluent is produced by introducing a hydrocarbon stream into the reactor during the standard operating period, where hydrogen sulfide is produced from an organic sulfur compound in the hydrocarbon stream. Steam is produced in the stripper liquid fraction heat exchanger during the standard operating period.

Methods and apparatuses are provided for hydrotreating hydrocarbons. A method includes heating a start-up oil in a stripper liquid fraction heat exchanger during a start-up period, and heating a reactor with the start-up oil. The start-up oil is discharged from the reactor when the start-up period ends, and a standard operating period begins after the start-up period. A reactor effluent is produced by introducing a hydrocarbon stream into the reactor during the standard operating period, where hydrogen sulfide is produced from an organic sulfur compound in the hydrocarbon stream. Steam is produced in the stripper liquid fraction heat exchanger during the standard operating period.

The present invention relates to a wet start-up method for hydrogenation unit, an energy-saving hydrogenation process, and a hydrogenation apparatus. The method involves heating a start-up activating oil to a specific temperature and flowing the heated oil through a bed of hydrogenation catalyst bed, so that the temperature at the catalyst bed layer is increased to 18010 C. or above by means of heat exchange and the reaction heat generated from activation in the start-up method.

The present invention relates to a wet start-up method for hydrogenation unit, an energy-saving hydrogenation process, and a hydrogenation apparatus. The method involves heating a start-up activating oil to a specific temperature and flowing the heated oil through a bed of hydrogenation catalyst bed, so that the temperature at the catalyst bed layer is increased to 18010 C. or above by means of heat exchange and the reaction heat generated from activation in the start-up method.

Embodiments of the present disclosure generally relate to methods and systems for purifying hydrocarbons, such as feedstock hydrocarbons containing one or more contaminants. In one or more embodiments, a method of purifying a hydrocarbon is provided and includes flowing a feedstock hydrocarbon stream through a heating unit, then combining the hydrocarbon stream and a primary solvent in a laminar flow reactor to produce a hydrocarbon-solvent stream, flowing the hydrocarbon-solvent stream through a cooling unit, and introducing the hydrocarbon-solvent stream into a separation unit to produce a scrubbed hydrocarbon stream and a solvent stream. The scrubbed hydrocarbon stream has a final contaminant concentration which is less than the initial contaminant concentration. The methods and systems for purifying hydrocarbons may be used to prepare a purified hydrocarbon product having the contaminant reduced by 10 times, about 40 times, about 100 times, or greater compared to the feedstock hydrocarbons.

Embodiments of the present disclosure generally relate to methods and systems for purifying hydrocarbons, such as feedstock hydrocarbons containing one or more contaminants. In one or more embodiments, a method of purifying a hydrocarbon is provided and includes flowing a feedstock hydrocarbon stream through a heating unit, then combining the hydrocarbon stream and a primary solvent in a laminar flow reactor to produce a hydrocarbon-solvent stream, flowing the hydrocarbon-solvent stream through a cooling unit, and introducing the hydrocarbon-solvent stream into a separation unit to produce a scrubbed hydrocarbon stream and a solvent stream. The scrubbed hydrocarbon stream has a final contaminant concentration which is less than the initial contaminant concentration. The methods and systems for purifying hydrocarbons may be used to prepare a purified hydrocarbon product having the contaminant reduced by 10 times, about 40 times, about 100 times, or greater compared to the feedstock hydrocarbons.