Fecha límite para el envío de resumenes: 21/Abril/2024

The oil industry in the world generates a considerable amount of oil sludge (OS) of over 1.0 million tons per year, produced during the stages of oil exploration, production, transportation, storage, and refining. An alternative for OS management and treatment is gasification. For this work, the gasification process and subsequent Fischer-Tropsch synthesis were modeled using the Aspen-Hysys® software. OS gasification simulation considers kinetic models for the chemical reaction speed of the main OS compounds. Furthermore, air and superheated steam mixtures were used as gasification agents. In order to use syngas, its composition must have a molar ratio of H2/CO>2.0 to ensure adequate performance of the Fischer-Tropsch synthesis reaction for the production of synthetic naphtha. The results showed that the thermochemical conversion of OS requires a gasification temperature above 1300°C, aiming to guarantee a high conversion (> 90%) of the hydrocarbons present in the feedstock. The lower heating value (LHV) of syngas varied between 7.0 and 11.1 MJ/Nm3. Regarding the Fischer-Tropsch synthesis, a production rate of synthetic liquid fuels of around 0.48 L of naphtha/kg-OS was obtained, particularly for pressures above 15 bar in the reactor. It is concluded that increasing the temperature of the gasification process favors thermal cracking and reforming reactions with generic hydrocarbon vapor (CxHy), leading to a greater molar concentration of H2, CO, and CH4 in the syngas and influencing its LHV. Besides, increases in operating pressure (above 15 bar) in the Fischer-Tropsch synthesis do not lead to significant increases in the conversion of the synthesis reaction.

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