Process for the integrated production of H2 and aviation kerosene from a renewable raw material
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorRoberto Carlos Pontes Bittencourt
Life of this patent
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Abstract
The present invention addresses to a process for the integrated production of H2 and aviation kerosene from renewable raw materials aiming at reducing CO2 emissions and consequently bringing benefits to reduce the impact of global warming on the planet. The process involves a hydrotreatment section to obtain n-paraffins followed by a hydroisomerization section to produce isoparaffins. The water and light hydrocarbons obtained in the isoparaffin production process are used for the production of H2 by the steam reforming process. An alcohol, such as ethanol or glycerin, with less than 6 carbon atoms, is fed into the hydrotreating section to make up the light hydrocarbon stream used in the production of renewable hydrogen.
Claims14
A process for integrated production of H2 and aviation kerosene from a renewable raw material, the process comprising:
- (a) reacting, in a hydrotreating section, in the presence of H2 and a catalyst in a fixed bed, a mixture of renewable raw material and an oxygenated hydrocarbon of up to 6 carbon atoms diluted with a product to produce a stream containing n-paraffins and isoparaffins with 12 to 18 carbon atoms, and a stream of light products;
- (b) hydroisomerizing and hydrocracking, in a hydroisomerization and hydrocracking section, at least a portion of the n-paraffins produced in the presence of H2 and a fixed bed selective catalyst to produce a stream containing isoparaffins and the product;
- (c) separating, in a separation section, the stream containing n-paraffins and isoparaffins with 12 to 18 carbon atoms and the stream of light products into an aqueous stream, a hydrocarbon stream with a chain size of up to 6 carbon atoms, a stream in a naphtha distillation range, a stream in a distillation range of the aviation kerosene, a stream in a distillation range of diesel and a heavy material stream;
- (d) recycling a part of the heavy material stream to the hydrotreating section and a fraction of the diesel stream to the hydroisomerization and hydrocracking section;
- (e) using the aqueous stream for generation of steam for production of hydrogen by steam reforming and the hydrocarbon stream with the chain size of up to 6 carbon atoms as charge, and optionally as fuel for the production of hydrogen by steam reforming;
- (f) recycling at least a part of the hydrogen produced by steam reforming for producing n-paraffins in the hydrotreating section and for producing isoparaffins in the hydroisomerization and hydrocracking section.
Dependencies are inferred from the claim text.