Aviation fuel with high renewable fuel content and reduced aromatic content

Abstract

The present invention relates to a jet fuel composition comprising, relative to the total volume of the composition: a. from 9% to 60% by volume of a jet fuel in accordance with standard ASTM d1655-21-c; b. from 30% to 90% by volume of a renewable synthetic kerosene base, the kerosene base being derived from the hydroprocessing of esters and fatty acids, a Fischer-Tropsch process, or a process for producing jet fuel from alcohols; and c. from 1% to 15% by volume of an aromatic base comprising at least 70% by weight, preferably 80% by weight, C8-C12 aromatic compounds, relative to the total weight of the aromatic base.

Description

[0001] Aviation fuel with high renewable fuel content and low aromatics content

[0002] TECHNICAL FIELD

[0003] The present invention relates to the field of jet fuels and in particular to a jet fuel derived from a mixture of fossil feedstocks and a renewable feedstock, said mixture having a high content of renewable fuel and having a reduced content of aromatic compounds.

[0004] CONTEXT OF THE INVENTION

[0005] The current context is largely in favor of decarbonizing the aviation sector, due to the high carbon footprint of this sector and its impact on the environment. Decarbonizing the aviation sector requires the increasing use of fuels called Semi Synthetic Jet Fuel (SSJF) including a fraction of Sustainable Aviation Fuel (SAF) whose carbon footprint is significantly reduced compared to the fossil jet fuel currently used. SSJF is generally a blend of a renewable paraffinic base and a jet fuel. There are international standards that limit the incorporation rate of the renewable paraffinic base to 50% for the production of SSJF with a fraction of SAF including a renewable source of jet fuel.However, this rate of incorporation of the renewable paraffinic base is in practice limited to lower contents, in particular due to constraints of density, density, freezing point, viscosity or aromatic compound content. Thus, the SSJF blends as currently proposed generally contain 30% to 40% by volume of renewable paraffinic base, and it is not always possible to achieve 50% by volume of renewable paraffinic base in a blend with commercial jets. This delta between the actual limitation of 50% by volume and the observed limitation of 30 to 40% therefore limits the decarbonization of the aviation sector.

[0006] STATE OF THE ART

[0007] Document EP4079827 describes in particular a jet fuel composition comprising an addition of aromatic compounds by addition of a bio-oil obtained by thermochemical conversion of lignocellulosic product. Document WO2016 / 060450 also describes a biofuel composition and its preparation process.

[0008] However, these solutions do not allow to obtain a renewable paraffinic base incorporation rate of up to 50% in SSJF mixtures.

[0009] By extension, and for the same reasons, it is not always possible to incorporate more than 50% by volume of renewable paraffinic base.

[0010] There is therefore a need to provide a jet fuel composition that can solve the problems mentioned above.

[0011] There is also a need for a process for preparing such a composition.

[0012] DESCRIPTION OF THE INVENTION

[0013] The present invention proposes a SSJF formulation comprising a SAF fraction based on a mixture of paraffinic SBC, a jet fraction and an aromatic base making it possible to overcome the current incorporation limit of 30%-40% of SAF while guaranteeing the specifications of the final SSJF obtained.

[0014] For this purpose, the invention relates to a jet fuel composition comprising, relative to the total volume of the composition: a) from 9% to 60% by volume of a jet conforming to ASTM D1655-21-c, b) from 30% to 90% by volume of a renewable synthetic paraffinic kerosene (SPK) type paraffinic base, said paraffinic base being derived from a hydrotreatment of esters and fatty acids (SPK-HEFA), a Fischer-Tropsch process (SPK-FT) or a process for producing jet fuel from alcohols, c) from 1% to 15% by volume of an aromatic base comprising at least 70% by mass, preferably 80% by mass of C8-C12 aromatic compounds, relative to the total mass of the aromatic base.

[0015] The inventors have discovered that the composition described above, and in particular the addition of 1 to 15% by volume of an aromatic base, of renewable or fossil origin, makes it possible to solve the aforementioned technical problems. In particular, it makes it possible to meet all the specifications by maximizing the quantity of paraffinic base of renewable origin while minimizing the content of aromatic compounds which is responsible for particulate emissions during combustion.The invention also relates to a process for a jet fuel composition, comprising at least the following steps: a) producing a jet conforming to ASTM D1655-21-c, b) producing a renewable synthetic paraffinic kerosene-type paraffinic base by hydrotreating esters and fatty acids, by a Fischer-Tropsch process or by a process for producing jet fuel from alcohols, c) producing an aromatic base comprising at least 70% by mass, preferably 80% by mass of C8-C12 aromatic compounds relative to the total mass of the aromatic base, and d) mixing 9% to 60% by volume of the jet from step a), 30% to 90% by volume of the paraffinic base from step b) and 1 to 15% by volume of the aromatic base from step c).

[0016] Preferably, step c) comprises the conversion of biomass or alcohols, the conversion of lignin, or steam cracking or fluidized bed catalytic cracking (FCC) or catalytic reforming of a feedstock of renewable origin to obtain an aromatic base of renewable origin, and / or steam cracking or fluidized bed catalytic cracking and / or catalytic reforming of a fossil feedstock to obtain an aromatic feedstock of fossil origin, and optionally a step of mixing the aromatic base of renewable origin and the aromatic base of fossil origin.

[0017] DETAILED DESCRIPTION OF THE INVENTION

[0018] The term "jet" as used herein means a fuel for a turbine (turbojet or turboprop) aircraft engine

[0019] The terms "comprising" and "comprises" as used herein are synonymous with "including," "includes," or "contains," "containing," and are inclusive or unbounded and do not exclude additional features, elements, or method steps not specified.

[0020] The expressions "from ... to ...", "between ... and ..." include the limits.

[0021] The expressions % by weight and % by mass have an equivalent meaning and refer to the proportion of the mass of a product relative to 100g of a composition comprising it.

[0022] The expression % by volume refers to the proportion of the volume of a product reported to 100 L of a composition comprising it. Paraffinic base

[0023] Paraffinic base is a synthetic paraffinic fuel produced from non-petroleum raw material.

[0024] Said synthetic paraffinic fuel is advantageously a synthetic paraffinic kerosene (SPK) from a hydrotreatment of esters and fatty acids (SPK-HEFA), a Fischer-Tropsch process (SPK-FT) or a process for producing jet fuel from alcohols (SPK-ATJ).

[0025] The paraffinic synthetic fuel of the present invention is thus a renewable fuel obtained exclusively from compounds of non-fossil origin.

[0026] SPK-HEFA Renewable Paraffinic Synthetic Fuel may be produced from naturally occurring oil(s) by a process of hydrogenation and deoxygenation of fatty acid esters and free fatty acids and further processing of the product including hydrocracking, or hydroisomerization, or isomerization, or a combination of these steps, and may include other conventional refining processes. In other words, SPK-HEFA Renewable Paraffinic Synthetic Fuel is produced from the hydrotreatment of esters and fatty acids from a naturally occurring oil. It is preferably compatible with ASTM D7566-22a Annex A2.

[0027] An oil of natural origin is defined as an oil of biomass origin and containing no mineral oil. In the description "oil(s) of natural origin" refers indifferently to oils, fats and their mixtures. Where said oils of natural origin may contain one or more oils chosen from vegetable oils, animal fats, preferably non-edible highly saturated oils, used oils, by-products of the refining of vegetable oil(s) or animal oil(s) containing free fatty acids, tailoils and oils produced by bacteria, yeasts, algae, prokaryotes or eukaryotes.Suitable vegetable oils include palm oil, palm kernel oil, soybean oil, rapeseed oil (colza or canola), sunflower oil, linseed oil, bran oil, rice oil, corn oil, olive oil, castor oil, sesame oil, pine oil, peanut oil, mustard oil, carinata oil, hemp oil, coconut oil, babasu oil, cottonseed oil, linola oil, jatropha oil. Animal fats include tallow, lard, fat (yellow and brown fat), fish oil / fat, butterfat, milk fats.

[0028] By-products of vegetable or animal oil refining are by-products containing free fatty acids that are removed from crude fats and oils by neutralization or distillation under vacuum or steam. A typical example is PFAD (Palm Fatty Acid Distillate). Waste oils include used cooking oils (used edible oils) and oils recovered from wastewater, such as grease / drainage oils, gutter oils, sewage oils, e.g., from water treatment plants, and waste fats from the food industry. Tall oils, including crude tall oils, distilled tall oils (DTOs), and tall oil fatty acids (TOFAs), preferably DTO and TOFA, may also be used in the present invention.Tall oil, or otherwise known as tallol, is a liquid by-product of the Kraft wood processing process, used to isolate wood pulp useful for the paper industry. Tall oil is essentially obtained when conifers are used in the Kraft process. After treating the wood chips with sodium sulfide in aqueous solution, the isolated tall oil is alkaline. The latter is then acidified with sulfuric acid to produce crude tall oil. The oil(s) of natural origin used in the present invention also include oils produced by microorganisms, either natural microorganisms or genetically modified microorganisms, such as bacteria, yeasts, algae, prokaryotes or eukaryotes. In particular, such oils can be recovered by well-known mechanical or chemical extraction methods.

[0029] SPK-FT renewable paraffinic synthetic fuel is derived from a Fischer-Tropsch process and can be produced from solid biomass. It is preferably compatible with ASTM D7566-22a Annex A1 specification. Thermochemical conversion of biomass (Fischer-Tropsch gasification and synthesis), also called BtL (Biomass to Liquid), includes the following steps: biomass conditioning (preparation, crushing, torrefaction), biomass gasification (obtaining synthesis gas), synthesis gas purification, Fisher-Tropsch synthesis to transform the gas into synthetic biofuel.

[0030] Regardless of the aforementioned process used, the paraffinic synthetic fuel may have been subjected to an isomerization and / or distillation step before its incorporation into the composition of the invention, in order to eliminate the heaviest linear paraffins which would not allow the cold properties of the jet to be respected, in particular the crystal disappearance point which must be less than -47°C for Jet A1 or -40°C for Jet A), preferably less than or equal to -40°C for SBC mixtures of the SBC-FT or SBC-HEFA type. The lighter compounds may also be separated by distillation, in order to respect, in particular, the volatility and flash point properties of the Jet (A1 or A). Regardless of the aforementioned process used, the renewable paraffinic synthetic fuel may have one or more of the following characteristics:

[0031] - a paraffin content greater than 90% by mass, relative to the total mass of the paraffinic base,

[0032] - a cycloparaffin content of less than 10% by mass, relative to the total mass of the paraffinic base,

[0033] - a freezing point below -30°C, preferably below -40°C, for example below -47°C,

[0034] - a density at 15°C between 730 and 780kg / m 3 ,

[0035] - a distillation range from 145°C to 315°C,

[0036] - an isoparaffin content of 70% by mass or more, preferably 75% by mass or more, relative to the total mass of the paraffinic base.

[0037] SPK-ATJ Renewable Synthetic Paraffin Fuel can conform to ASTM D7566-22a Appendix A5 but can also be produced from any alcohol with 1 to 6 carbon atoms. SPK-ATJ Renewable Fuel is produced by dehydrating alcohols to produce olefins, followed by oligomerization of the olefins to produce unsaturated hydrocarbon molecules in the boiling temperature range of SAF. These unsaturated hydrocarbon molecules are then hydrogenated to produce the paraffinic base.

[0038] Preferably the alcohol is chosen from methanol, ethanol, propanol, isopropanol, butanol and iso-butanol and any of their mixtures.

[0039] Preferably, the paraffinic base comprises at least 90% by mass of paraffins relative to the total mass of the paraffinic base.

[0040] Aromatic Base

[0041] The composition according to the invention comprises an aromatic base comprising at least 70%, preferably 80% by mass of C8-C12 aromatic compounds, relative to the total mass of the aromatic base.

[0042] The aromatic base can be a base of renewable origin or a base of fossil origin.

[0043] A renewable base is understood to mean an aromatic base resulting from the conversion of biomass or alcohols, lignin conversion, steam cracking or fluidized bed catalytic cracking (FCC in English terminology), catalytic reforming, or a feedstock of renewable origin.

[0044] A renewable source base is understood to mean a load of biological origin.

[0045] The composition of the aromatic base is optimized to improve the properties of the paraffinic and jet base mixture, while minimizing its incorporation rate in order to limit the aromatic content of the final composition.

[0046] The aromatic base mainly contains compounds comprising from 8 to 12 carbon atoms, and preferably mainly compounds comprising from 8 to 10 carbon atoms.

[0047] Preferably, the aromatic base comprises from 70% to 99.8% by mass of C8-C12 aromatic compounds, relative to the total mass of the aromatic base, preferably from 80% to 99% by mass, preferably from 85% to 98% by mass, preferably from 90 to 95% by mass.

[0048] Preferably, the aromatic base comprises from 60% to 99% by mass of C8-C10 aromatic compounds, relative to the total mass of the aromatic base, preferably from 70% to 90% by mass, preferably from 80 to 95% by mass.

[0049] Preferably, the aromatic base has a mass ratio between the mass quantity of C8-C10 aromatic compounds of the aromatic base and the mass quantity of C6-C14 compounds of the aromatic base, greater than or equal to 0.80, preferably greater than or equal to 0.85, preferably between 0.80 and 0.99.

[0050] Preferably, the aromatic base has a mass ratio between the mass quantity of C8-C12 aromatic compounds of the aromatic base and the mass quantity of C6-C14 compounds of the aromatic base, greater than or equal to 0.90, preferably greater than or equal to 0.95, preferably between 0.90 and 1.

[0051] Preferably, the average carbon number C mOy of the aromatic compounds of the aromatic base is less than or equal to 10.0, preferably less than or equal to 9.8, preferably less than or equal to 9.5. Preferably, the average carbon number Cmoy of the aromatic compounds of the aromatic base is between 7.5 and 10.0, preferably between 8.0 and 10.0, preferably between 8.2 and 9.8, preferably between 8.5 and 9.5.

[0052] The average carbon number C mO y of the aromatic compounds of the aromatic base corresponds to the average of the carbon number of all the aromatic compounds of the aromatic base. This average can be calculated according to the following formula:

[0053] [Math 1] i being an integer, imin being the carbon number of the aromatic compound of the aromatic base having the lowest carbon number among all the aromatic compounds of the aromatic base, imax being the carbon number of the aromatic compound of the aromatic base having the highest carbon number among all the aromatic compounds of the aromatic base, and

[0054] Xi being the mass fraction of all aromatic compounds of the aromatic base having a number of carbon atoms equal to i.

[0055] Preferably, i ranges from 6 to 14, preferably from 8 to 12. In other words, preferably, imin = 6 and imax = 14, preferably imin = 8 and imax = 12.

[0056] Preferably, the aromatic base comprises, relative to the total mass of the aromatic base, from 5% to 25% by mass of C8 aromatic compounds, preferably from 8% to 20% by mass.

[0057] Preferably, the aromatic base comprises, relative to the total mass of the aromatic base, from 25% to 70% by mass of C9 aromatic compounds, preferably from 30% to 65% by mass.

[0058] Preferably, the aromatic base comprises, relative to the total mass of the aromatic base, from 10% to 35% by mass of C10 aromatic compounds, preferably from 10% to 25% by mass.

[0059] Preferably, the aromatic base comprises, relative to the total volume of the aromatic base, a quantity of naphthalene less than or equal to 1% by volume, preferably less than or equal to 0.5% by volume, preferably less than or equal to 0.1% by volume, advantageously between 0.0005% and 1% by volume. The presence of at least 70% by mass, preferably 80% by mass of C8-C12 aromatic compounds in the aromatic base, further having an average carbon number less than or equal to 10, advantageously allows the naphthalene content to be low.

[0060] Preferably, the aromatic base is chosen from an aromatic base of renewable origin resulting either from the conversion of biomass or alcohols, or from the conversion of lignin, or from steam cracking or fluidized bed catalytic cracking (FCC) or from the catalytic reforming of a feedstock of renewable origin, an aromatic base of fossil origin resulting from a steam cracking or fluidized bed catalytic cracking process or from the catalytic reforming of a fossil feedstock, and any of their mixtures.

[0061] According to a variant of the invention, the aromatic compounds resulting from the processes described can undergo an additional concentration step by a solvent extraction process for the aromatics.

[0062] According to one embodiment, the aromatic base is an aromatic base of renewable origin, preferably as described above.

[0063] According to another embodiment, the aromatic base is an aromatic base of fossil origin, preferably as described above.

[0064] Jet conforms to ASTM D1655-21 -c

[0065] The composition according to the invention comprises a jet conforming to standard ASTM D1655-21-c.

[0066] Preferably, the jet conforming to ASTM D1655-21 -c is Jet A1, or Jet A.

[0067] Jet A1 or A is generally produced by atmospheric distillation of crude oil followed by further processing such as sweetening or hydrodesulfurization to produce a hydrocarbon fraction with reduced mercaptan content. It may also contain fractions from hydrocracking processes of vacuum gas oil fractions.

[0068] Jet fuel composition according to the invention

[0069] Preferably, the composition according to the invention comprises, relative to the total volume of the composition, from 1% to 15% by volume of aromatic base, preferably from 1% to 8% by volume, preferably from 1% to 5% by volume.

[0070] Preferably, the composition according to the invention comprises, relative to the total volume of the composition, from 30% to 50% by volume of paraffinic base, alternatively from 50% to 80% by volume.

[0071] Preferably, the composition according to the invention comprises, relative to the total volume of the composition, from 12% to 55% by volume of jet conforming to standard ASTM D1655-21 - c, preferably from 15% to 50% by volume.

[0072] Preferably, the composition according to the invention comprises a quantity less than or equal to 25% by volume, preferably less than 15% by volume, preferably less than or equal to 10% by volume of aromatic compounds, relative to the total volume of the composition.

[0073] The examples below illustrate the invention without limiting its scope.

[0074] EXAMPLES

[0075] In all examples, the composition of the aromatic bases was determined according to the following method: the UOP 744 method was used to determine the composition of aromatics up to C12, and a GC2D method was then used to specify the nature of the compounds not determinable by UOP 744.

[0076] UOP Method 744: The sample is injected into a gas chromatograph equipped with a flame ionization detector (FID) and a fused silica capillary column internally coated with cross-linked polyethylene glycol. The mass% composition of the sample is obtained by normalizing the peak areas after applying relative response factors to correct for differences in detector mass response.

[0077] Chromatographic column, 60 m of 0.32 mm inner diameter fused silica capillary, internally coated with cross-linked polyethylene glycol with a film thickness of 0.5 µm.

[0078] GC2D was performed using the conditions cited in the publication: Marko R. Djokic et al. Quantitative analysis of crude and stabilized bio-oils by comprehensive two-dimensional gas-chromatography. Journal of Chromatography A, 1257 (2012) pp131-140, Table 1.

[0079] The jet and HEFA bases used in Examples 1 and 2 have the following compositions (in mass percentage):

[0080] [Table 1]

[0081] The aromatic bases of renewable origin used in examples 1 and 2 have the following compositions (in mass percentage):

[0082] [Table 2]

[0083] The different bases used in examples 1 and 2 have the following characteristics:

[0084] [Table 3]

[0085] Example 1

[0086] A comparative composition C1 * and two compositions according to the invention C2 and C3 are prepared.

[0087] C1 * comprises 50% by volume of a fossil jet base a) and 50% by volume of HEFA-1 conforming to the paraffinic base b) according to the invention.

[0088] C2 comprises 50% by volume of a fossil jet base a), 45% by volume of HEFA-1 conforming to the paraffinic base b) according to the invention and 5% by volume of an aromatic base 1 c) according to the invention.

[0089] C3 comprises 50% by volume of a fossil jet base a), 40% by volume of HEFA-1 conforming to the paraffinic base b) according to the invention and 10% by volume of an aromatic base 1 c) according to the invention. Compositions CT, C2 and C3 have the properties detailed in the following table (these characteristics were determined according to the standards specified in each column):

[0090] [Table 4]

[0091] : comparison

[0092] These results show that:

[0093] - The 50% jet and 50% HEFA mixture (comparative C1* composition) is non-compliant in terms of its freezing point,

[0094] - The addition of 5% aromatic cut lowers the freezing point by approximately 1°C, and the addition of 10% aromatic cut lowers the freezing point by approximately 2°C, making compositions C2 and C3 compliant with the standards concerning the freezing point,

[0095] - Adding 5% aromatic cut lowers by about 0.27 mm 2 / s viscosity at -20°C, and the addition of 10% aromatic cut lowers it by about 0.68 mm 2 / s the viscosity at -20°C, and

[0096] - Adding 5% aromatic cut lowers by about 0.68 mm 2 / s viscosity at -40°C, and the addition of 10% aromatic cut lowers it by about 1.77 mm 2 / s viscosity at -40°C.

[0097] In conclusion:

[0098] On the freezing point

[0099] The mixed jet and HEFAI have freezing points close to the specification (-46.4°C but not compliant since the ASTM D7566-22a regulation provides a maximum freezing point of -47°C) and their mixture at proportions of 50 / 50 (volumes) does not allow to have a compliant freezing point. The addition of 5% of aromatics allows to go below -47°C by lowering the freezing point by 1°C and therefore to become compliant. The addition of 10% allows to lower the freezing point by 2°C (-48.4°C).

[0100] On viscosity

[0101] The addition of 5 or 10% of aromatics advantageously allows the viscosity of the HEFA / jet 50 / 50 mixture to be further reduced.

[0102] Example 2

[0103] A comparative composition C4* and two compositions according to the invention C5 and C6 are prepared.

[0104] C4* comprises 50% by volume of a fossil jet base a) (the same as that of example 1) and 50% by volume of HEFA-2 conforming to the paraffinic base b) according to the invention.

[0105] C5 comprises 45% by volume of a fossil jet base a), 50% by volume of HEFA-2 in accordance with the paraffinic base b) according to the invention and 5% by volume of the aromatic base Aro2 in accordance with the invention.

[0106] C6 comprises 40% by volume of a fossil jet base a), 50% by volume of HEFA-2 in accordance with the paraffinic base b) according to the invention and 10% by volume of the aromatic base Aro2 in accordance with the invention.

[0107] Compositions C4*, C5 and C6 have the properties detailed in the following table (these characteristics were determined according to the standards specified in each column):

[0108] [Table 5]

[0109] : comparison

[0110] These results show that: - The addition of 5% of organic aromatic cut lowers the freezing point by approximately 1.3°C, and the addition of 10% of aromatic cut lowers the freezing point by approximately 2.2°C;

[0111] - Adding 5% aromatic cut lowers by about 0.64 mm 2 / s viscosity at -40°C and the addition of 10% aromatic cut lowers it by about 1.16 mm 2 / s viscosity at -40°C;

[0112] - Adding 5% aromatic cut lowers by about 0.33 mm 2 / s viscosity at -20°C and the addition of 10% aromatic cut lowers it by about 0.56 mm 2 / s the viscosity at -20°C; and

[0113] - Adding 5% aromatic cut increases the density by 3 kg / m 3 , and the addition of 10% aromatic cut increases the MV (Densities) by approximately 6 kg / m 3 .

[0114] Example 3: impact of aromatic compound content

[0115] Four blend compositions of a renewable paraffinic base (HEFA-3) and two fossil-based aromatic bases were prepared. The compositions of the two aromatic bases are shown in the following table. Aro4 base is a blend of two commercial aromatic bases, and Aro3 base is a commercially available aromatic base.

[0116] [Table 6] Compositions C7*, C8*, C9* and C10* have the compositions and properties detailed in the following table (these characteristics were determined according to the standards specified in each column): [Table 7]

[0117] These results show that the viscosity of compositions comprising the aromatic base Aro4 (C8* to C10*) is lower than the C7* composition comprising the aromatic base Aro3 (compare C7* and C8*). The viscosity reduction compared to that of HEFA alone is greater when the aromatic base Aro4 is added than the aromatic base Aro3, which has a higher average carbon number.

[0118] A corollary of the lower average carbon number of the Aro4 aromatic base is that it is substantially free of naphthalene, which reduces fine particle emissions during combustion.

Claims

CLAIMS 1. A jet fuel composition comprising, based on the total volume of the composition: a. from 9% to 60% by volume of a jet conforming to ASTM D1655-21-c, b. from 30% to 90% by volume of a paraffinic base of the renewable synthetic paraffinic kerosene type, said paraffinic base being derived from a hydrotreatment of esters and fatty acids, a Fischer-Tropsch process or a process for producing jet fuel from alcohols, and c. from 1% to 15% by volume of an aromatic base comprising at least 70% by mass, preferably 80% by mass of C8-C12 aromatic compounds, based on the total mass of the aromatic base.

2. Composition according to claim 1, in which the aromatic base comprises from 70% to 99.8% by mass of C8-C12 aromatic compounds, relative to the total mass of the aromatic base, preferably from 85% to 98% by mass, preferably from 90 to 95% by mass.

3. Composition according to claim 1 or 2, in which the aromatic base has a mass ratio between the mass quantity of C8-C10 aromatic compounds and the mass quantity of C6-C14 compounds, greater than or equal to 0.80, preferably greater than or equal to 0.85, preferably between 0.80 and 0.

99.

4. Composition according to any one of the preceding claims, in which the average carbon number of the aromatic compounds of the aromatic base is less than or equal to 10.0, preferably less than or equal to 9.8, preferably less than or equal to 9.

5.

5. Composition according to any one of the preceding claims, comprising an amount less than or equal to 25% by volume, preferably less than 15% by volume, preferably less than or equal to 10% by volume of aromatic compounds, relative to the total volume of the composition.

6. Composition according to any one of the preceding claims, comprising, relative to the total volume of the composition, from 1% to 8% by volume of aromatic base, preferably from 1% to 5% by volume.

7. Composition according to any one of the preceding claims, in which the aromatic base comprises, relative to the total volume of the aromatic base, a quantity of naphthalene less than or equal to 1% by volume.

8. Composition according to any one of the preceding claims, in which the aromatic base is chosen from: an aromatic base of renewable origin resulting either from the conversion of biomass or alcohols, or from the conversion of lignin, or from steam cracking or fluidized bed catalytic cracking or from the catalytic reforming of a feedstock of renewable origin, an aromatic base of fossil origin resulting from a steam cracking or fluidized bed catalytic cracking process or from the catalytic reforming of a fossil feedstock, and any of their mixtures.

9. A process for producing a jet fuel composition according to any one of claims 1 to 8, comprising at least the following steps: a) producing a jet conforming to ASTM D1655-21-c, b) producing a renewable synthetic paraffinic kerosene-type paraffinic base by hydrotreatment of esters and fatty acids, by a Fischer-Tropsch process or by a process for producing jet fuel from alcohols, c) producing an aromatic base comprising at least 70% by mass, preferably 80% by mass of C8-C12 aromatic compounds relative to the total mass of the aromatic base, and d) mixing 9% to 60% by volume of the jet from step a), 30% to 90% by volume of the paraffinic base from step b) and 1 to 15% by volume of the aromatic base from step c).

10. The method of claim 9, wherein step c) comprises: conversion of biomass or alcohols, conversion of lignin, or steam cracking or fluidized bed catalytic cracking or catalytic reforming of a feedstock of renewable origin to obtain an aromatic base of renewable origin, and / or - steam cracking or fluidized bed catalytic cracking and / or catalytic reforming of a fossil feedstock to obtain an aromatic feedstock of fossil origin, and Possibly a step of mixing the aromatic base of renewable origin and the aromatic base of fossil origin.

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