A sustainable low-carbon fuel and a method for its production

Abstract

The present application provides a kind of sustainable low carbon fuel and its preparation method, including base fuel oil 99.8-99.85wt% and additive 0.15-0.2wt%;Base fuel oil includes petroleum-based diesel 48-68vol% and hydrocarbon-based biodiesel 32-52vol%;Additive includes solvent oil 42-50wt%, dispersion inhibitor 14-19wt%, carrier agent 13-18wt%, demulsifier 0.5-2wt%, antirust agent 0.4-1wt%, defoaming agent 0.1-0.4wt%, low temperature flow modifier 14-18wt% and hydrogen donor 3-6wt%. The fuel prepared by the above raw materials has higher cetane number, and excellent low temperature stability, further enabling diesel engine to have good low temperature startability. Through bench test, compared with national VI 0# diesel fuel, the fuel consumption rate of sustainable low carbon fuel is reduced by 2%, the soot emission is reduced by 30%, the NO x x emission is reduced by 15%.

Description

Technical Field

[0001] This invention belongs to the field of fuel technology, and in particular relates to a sustainable low-carbon fuel and its preparation method. Background Technology

[0002] On July 7, 2021, Beijing issued stricter local standards for fuel products, requiring the addition of fuel additives. In May 2022, a group standard for fuel detergents and enhancers was introduced, encouraging local Shandong companies to add fuel detergents and enhancers to the fuels they sell. With increasingly stringent emission regulations in the future, fuels currently sold in the market will not meet future regulatory requirements.

[0003] Currently, diesel vehicles NO x Emissions from diesel vehicles exceed 80% of total vehicle emissions and over 90% of PM emissions, making them a major source of mobile pollution. There are many methods to achieve diesel engine decarbonization targets. In terms of power systems, the main approaches are using new power systems such as batteries and hybrid powertrains. However, due to battery weight and size limitations, these are only suitable for short-distance routes. Regarding low-carbon fuels, hydrogen, ammonia, methanol, and biofuels are currently the mainstream research directions. However, using hydrogen, ammonia, and methanol requires modifications to existing diesel engines, resulting in high application costs and difficulties in widespread adoption. Biofuels, on the other hand, are directly usable fuels that do not require major modifications to diesel engines and have low application costs. Using biofuels is one of the feasible climate solutions in recent years and will be the primary decarbonization method.

[0004] Due to its inherent properties such as high density, low calorific value, and poor stability, ester-based biodiesel can only be blended with diesel fuel in a low proportion, thus hindering its large-scale application. Second-generation biodiesel, specifically hydrocarbon-based biodiesel, offers advantages over conventional ester-based biodiesel, including better low-temperature fluidity, higher cetane number, and superior oxidation stability. Its performance is closer to that of fossil fuels, making it better suited for colder environments. Furthermore, it can be added to diesel fuel in a larger proportion, making it suitable for large-scale use and promoting the development of cleaner diesel fuels.

[0005] Diesel fuel still presents several problems in its use. Prolonged storage in the fuel tank exposes diesel to temperature and humidity fluctuations, leading to deterioration. High water content in diesel can cause fuel line blockage, injector wear, and corrosion of metal components. During combustion, diesel easily forms carbon deposits in engine injectors and cylinders. In low temperatures, high-grade diesel tends to wax in the fuel tank, clogging fuel lines and filters, affecting engine fuel supply and thus impacting low-temperature starting performance. Changes in diesel properties affect normal combustion, reducing engine power and fuel economy, and increasing emissions. Simply improving the properties of diesel fuel itself to solve these problems has significant limitations. Diesel fuel additives can effectively address issues such as water separation in diesel, improve low-temperature fluidity, reduce engine carbon deposit formation, enhance fuel protection for the engine, and improve engine performance. Simultaneously, the addition of additives can effectively reduce engine exhaust emissions. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a sustainable low-carbon fuel and a method for preparing the same, which has a high cetane number and excellent low-temperature stability, thereby enabling diesel engines to have good low-temperature starting performance and be applicable to more application scenarios.

[0007] This invention provides a sustainable low-carbon fuel, comprising the following components:

[0008] Base fuel oil 99.8–99.85 wt% and additives 0.15–0.2 wt%;

[0009] The base fuel oil comprises 48-68 vol% petroleum-based diesel and 32-52 vol% hydrocarbon-based biodiesel;

[0010] The additives include 42-50 wt% solvent oil, 14-19 wt% dispersion inhibitor, 13-18 wt% carrier agent, 0.5-2 wt% demulsifier, 0.4-1 wt% rust inhibitor, 0.1-0.4 wt% defoamer, 14-18 wt% low-temperature flow improver, and 3-6 wt% hydrogen donor.

[0011] Preferably, the petroleum-based diesel oil has a distillation range of 160–350°C, a pour point <-10°C, a cold filter plugging point <-5°C, a cetane number >46, a flash point >60°C, and a density of 830–850 kg / cm³. 3 It has a lower calorific value >42.8 MJ / kg, a cycloalkanes content >60 wt%, a total aromatics content <5 wt%, and a polycyclic aromatics content <1 wt%.

[0012] Preferably, the hydrocarbon-based biodiesel has a distillation range of 170–350°C, a pour point <-10°C, a cold filter plugging point <-5°C, a cetane number >62, a flash point >60°C, and a density of 760–800 kg / cm³.3 It has a low calorific value >43MJ / kg, a total aromatic hydrocarbon content <3wt%, and a polycyclic aromatic hydrocarbon content <1wt%.

[0013] Preferably, the solvent oil is an aromatic solvent with a distillation range of 180–210°C, a flash point >60°C, and an aromatic content >99.0 wt%.

[0014] Preferably, the dispersion inhibitor is a mixture of polyisobutylene succinic anhydride and polyisobutylene succinimide, wherein the acid value of polyisobutylene succinic anhydride is 100-110 mg KOH / g, the base value of polyisobutylene succinimide is 22-28 mg KOH / g, and the mass ratio of polyisobutylene succinic anhydride to polyisobutylene succinimide is 0.3:1-0.5:1;

[0015] The carrier is a mixture of nonylphenol polyoxypropylene ether and polyetheramine. The hydroxyl value of nonylphenol polyoxypropylene ether is 46-56 mgKOH / g; the molecular weight of polyetheramine is 1000-1200, the total amine content is 0.90-0.95 mg / g, and the primary amine accounts for >99.0% of the total amine content; the mass ratio of nonylphenol polyoxypropylene ether to polyetheramine is 0.3:1-0.5:1.

[0016] Preferably, the demulsifier is polyoxyethylene polyoxypropylene polyether, with the molecular structural formula C6H. 17 N4-[CH2CH2O] m -[CH(CH3)CH2O] n -H, where m=10~12, n=14~16, molecular weight is 1400~1600, and hydroxyl value is 36~38mgKOH / g.

[0017] Preferably, the rust inhibitor is an oil-soluble naphthenic acid imidazoline;

[0018] The defoamer is selected from polyoxyethylene polyoxypropylene pentaerythritol ether;

[0019] The low-temperature flow improver is a mixture of polyethylene vinyl acetate and light white oil in a mass ratio of 1:2.

[0020] The hydrogen-donating agent is tetrahydronaphthalene.

[0021] Preferably, the sustainable low-carbon fuel has a distillation range of 160–350°C, a pour point <-22°C, a cold filter plugging point <-16°C, a cetane number >52, a flash point >60°C, and a density of 810–830 kg / cm³. 3 It has a lower calorific value >43.0 MJ / kg, a total aromatic hydrocarbon content <5 wt%, and a polycyclic aromatic hydrocarbon content <1 wt%.

[0022] This invention provides a method for preparing the sustainable low-carbon fuel described in the above technical solution, comprising the following steps:

[0023] Petroleum-based diesel and hydrocarbon-based biodiesel are mixed evenly to obtain a base fuel oil;

[0024] After heating a portion of the solvent oil to 40–50°C, it is mixed with a dispersion inhibitor, a carrier agent, a demulsifier, a rust inhibitor, a defoamer, a low-temperature flow modifier, a hydrogen donor, and the remaining solvent oil, and stirred for 2–3 hours to obtain the additive.

[0025] By blending base fuel oils with additives, sustainable low-carbon fuels can be obtained.

[0026] This invention provides a sustainable low-carbon fuel comprising the following components: 99.8–99.85 wt% base fuel oil and 0.15–0.2 wt% additives; the base fuel oil comprises 48–68 vol% petroleum-based diesel and 32–52 vol% hydrocarbon-based biodiesel; the additives comprise 42–50 wt% solvent oil, 14–19 wt% dispersant inhibitor, 13–18 wt% carrier agent, 0.5–2 wt% demulsifier, 0.4–1 wt% rust inhibitor, 0.1–0.4 wt% defoamer, 14–18 wt% low-temperature flow improver, and 3–6 wt% hydrogen donor. The fuel prepared from the above raw materials has a high cetane number and excellent low-temperature stability, thereby enabling diesel engines to have good low-temperature starting performance, making it suitable for more application scenarios, while also exhibiting low fuel consumption and low soot and NO emissions. x Emissions. Sustainable low-carbon fuels have a distillation range of 160–350℃, a pour point <-22℃, a cold filter plugging point <-16℃, a cetane number >52, a flash point >60℃, and a density of 810–830 kg / cm³. 3 It has a low calorific value >43.0 MJ / kg, total aromatic hydrocarbon content (mass fraction) <5%, and polycyclic aromatic hydrocarbon content (mass fraction) <1%. Bench tests show that this sustainable low-carbon fuel reduces fuel consumption by 2% and soot emissions by 30% compared to China VI No. 0 diesel, while also reducing NOx emissions. x Emissions reduced by 15%. Detailed Implementation

[0027] This invention provides a sustainable low-carbon fuel, comprising the following components:

[0028] Base fuel oil 99.8–99.85 wt% and additives 0.15–0.2 wt%;

[0029] The base fuel oil comprises 48-68 vol% petroleum-based diesel and 32-52 vol% hydrocarbon-based biodiesel;

[0030] The additives include 42-50 wt% solvent oil, 14-19 wt% dispersion inhibitor, 13-18 wt% carrier agent, 0.5-2 wt% demulsifier, 0.4-1 wt% rust inhibitor, 0.1-0.4 wt% defoamer, 14-18 wt% low-temperature flow improver, and 3-6 wt% hydrogen donor.

[0031] The aforementioned sustainable low-carbon fuels, with their high cetane number and excellent low-temperature stability, enable diesel engines to have good low-temperature starting performance, making them suitable for a wider range of applications. Simultaneously, the sustainability of the raw material source and the excellent combustion performance of the fuels themselves result in low fuel consumption and low carbon emissions (NOx). x The effect of emissions.

[0032] The sustainable low-carbon fuel provided by this invention comprises 99.8-99.85 wt% base fuel oil and 0.15-0.2 wt% additives; in specific embodiments, the sustainable low-carbon fuel comprises 99.80 wt% base fuel oil and 0.20% additives; or the sustainable low-carbon fuel comprises 99.85 wt% base fuel oil and 0.15% additives; or the sustainable low-carbon fuel comprises 99.83 wt% base fuel oil and 0.17% additives.

[0033] The base fuel oil described in this invention comprises 48-68 vol% petroleum-based diesel and 32-52 vol% hydrocarbon-based biodiesel. Specifically, the base fuel oil comprises 50 vol% petroleum-based diesel and 50 vol% hydrocarbon-based biodiesel; or the base fuel oil comprises 58 vol% petroleum-based diesel and 42 vol% hydrocarbon-based biodiesel; or the base fuel oil comprises 65 vol% petroleum-based diesel and 35 vol% hydrocarbon-based biodiesel.

[0034] The petroleum-based diesel fuel described in this invention is obtained through deep hydrogenation of high-aromatic fossil fuel feedstock. This petroleum-based diesel fuel has a high cycloalkane content, low total aromatics content, low polycyclic aromatics content, and is characterized by low gum content and low soot formation tendency. The petroleum-based diesel fuel described in this invention has a distillation range of 160–350°C, a pour point <-10°C, a cold filter plugging point <-5°C, a cetane number >46, a flash point >60°C, and a density of 830–850 kg / cm³. 3 The diesel fuel has a lower calorific value >42.8 MJ / kg, a cycloalkanes content >60 wt%, a total aromatics content <5 wt%, and a polycyclic aromatics content <1 wt%. In a specific embodiment, the density of the petroleum-based diesel fuel is 845 kg / cm³. 3 It has a cetane number of 47, a freezing point of -16℃, a condensation point of -8℃, a flash point of 68℃, a lower heating value of 42.8 MJ / kg, a final boiling point of 348.5℃, a polycyclic aromatic hydrocarbon content of 0.5 wt%, and a total aromatic hydrocarbon content of 4 wt%.

[0035] The hydrocarbon-based biodiesel described in this invention is an alkane produced by hydrogenation of animal and vegetable oils, waste animal and vegetable oils, or their derivatives, and is suitable as a bio-liquid fuel for compression-ignition diesel engines. Hydrocarbon-based biodiesel can recycle the carbon stored in biomass feedstocks, reducing carbon emissions and possessing sustainability characteristics. The hydrocarbon-based biodiesel has a distillation range of 170–350°C, a pour point <-10°C, a cold filter plugging point <-5°C, a cetane number >62, a flash point >60°C, and a density of 760–800 kg / cm³. 3 It has a lower calorific value >43 MJ / kg, a total aromatic hydrocarbon content <3 wt%, and a polycyclic aromatic hydrocarbon content <1 wt%. In a specific embodiment, the density of the hydrocarbon-based biodiesel is 780 kg / cm³. 3 It has a cetane number of 64, a freezing point of -12℃, a condensation point of -6℃, a flash point of 64℃, a lower heating value of 43.6 MJ / kg, a final boiling point of 320.2℃, a polycyclic aromatic hydrocarbon content of 0.2 wt%, and a total aromatic hydrocarbon content of 2 wt%.

[0036] The sustainable low-carbon fuel provided by this invention comprises 0.15–0.2 wt% additives; said additives include 42–50 wt% solvent oil, 14–19 wt% dispersion inhibitor, 13–18 wt% carrier agent, 0.5–2 wt% demulsifier, 0.4–1 wt% rust inhibitor, 0.1–0.4 wt% defoamer, 14–18 wt% low-temperature flow improver, and 3–6 wt% hydrogen donor.

[0037] The additives described in this invention include 42-50 wt% solvent oil, which is an aromatic solvent and a chemical raw material; the aromatic solvent has a distillation range of 180-210°C, a flash point >60°C, and an aromatic content >99.0 wt%. The aromatic solvent is preferably an SA-1500 type aromatic solvent.

[0038] The additive described in this invention includes a dispersion inhibitor of 14-19 wt%, which inhibits the formation of gum and reduces carbon deposits in the combustion chamber. The dispersion inhibitor in this invention is a mixture of polyisobutylene succinic anhydride and polyisobutylene succinimide, wherein the acid value of the polyisobutylene succinic anhydride is 100-110 mg KOH / g, the base value of the polyisobutylene succinimide is 22-28 mg KOH / g, and the mass ratio of polyisobutylene succinic anhydride to polyisobutylene succinimide is 0.3:1-0.5:1. In a specific embodiment, the dispersion inhibitor is a mixture of polyisobutylene succinic anhydride and polyisobutylene succinimide in a mass ratio of 0.3:0.6.

[0039] The additives described in this invention include a carrier agent of 13-18 wt%, wherein the carrier agent is a mixture of nonylphenol polyoxypropylene ether and polyetheramine, the nonylphenol polyoxypropylene ether having a hydroxyl value of 46-56; the polyetheramine having a molecular weight of 1000-1200, a total amine content of 0.90-0.95 mg / g, and a primary amine accounting for >99.0% of the total amine content; and the mass ratio of nonylphenol polyoxypropylene ether to polyetheramine being 0.3:1-0.5:1. In a specific embodiment, the carrier agent is a mixture of nonylphenol polyoxypropylene ether and polyetheramine with a mass ratio of 0.3:0.8; the nonylphenol polyoxypropylene ether having a hydroxyl value of 55 mgKOH / g; the polyetheramine having a molecular weight of 1080, a total amine content of 0.95 mg / g, and a primary amine accounting for 99.3% of the total amine content.

[0040] The additive in this invention includes a demulsifier at 0.5-2 wt%. This demulsifier has excellent demulsification effects, reduces the water content in fuel, and enhances fuel cleanliness. The demulsifier in this invention is polyoxyethylene polyoxypropylene polyether, with the molecular formula C6H. 17 N4-[CH2CH2O] m -[CH(CH3)CH2O] n -H, where m = 10–12, n = 14–16, molecular weight is 1400–1600, and hydroxyl value is 36–38 mgKOH / g. The demulsifier is a mixture; in a specific embodiment, the average molecular weight of the polyoxyethylene polyoxypropylene polyether is 1500, and the hydroxyl value is 37.4 mgKOH / g.

[0041] The additives described in this invention include a rust inhibitor of 0.4–1 wt%, which reduces the corrosion of metal surfaces by fuel during storage, transportation, and use. The rust inhibitor is an oil-soluble naphthenic acid imidazoline, synthesized from naphthenic acid and diethylenetriamine. In a specific embodiment, the rust inhibitor is an oil-soluble naphthenic acid imidazoline.

[0042] The additives described in this invention include 0.1–0.4 wt% defoamer, which reduces foam generated during fuel use and improves fuel safety. The defoamer is preferably polyoxyethylene polyoxypropylene pentaerythritol ether.

[0043] The additives described in this invention include 14-18% low-temperature flow improvers. These low-temperature flow improvers can lower the fuel's pour point and cold filter plugging point, improve the product's stability in low-temperature environments, and make the fuel suitable for more application scenarios. The low-temperature flow improvers are a mixture of polyethylene vinyl acetate and light white oil in a 1:2 mass ratio. By mixing polyethylene vinyl acetate with light white oil to form a new product, the low-temperature flowability of polyethylene vinyl acetate can be improved, thus increasing the compounding efficiency.

[0044] The additive described in this invention includes a hydrogen donor of 3-6 wt%, which provides hydrogen atoms during fuel combustion, reducing the formation of gum and carbon deposits. The hydrogen donor is tetrahydronaphthalene.

[0045] The hydrocarbon-based biodiesel used in this invention is biorenewable, a sustainable feedstock that meets the requirements of future low-carbon development. The sustainability of the feedstock source and the excellent combustion performance of the fuel itself achieve low fuel consumption and low carbon emissions (NOx). x The effect on emissions. By using a sustainable low-carbon fuel as described in this application, we can contribute to achieving decarbonization goals.

[0046] The sustainable low-carbon fuel provided by this invention has a distillation range of 160–350°C, a pour point <-22°C, a cold filter plugging point <-16°C, a cetane number >52, a flash point >60°C, and a density of 810–830 kg / cm³. 3 It has a low calorific value >43.0 MJ / kg, total aromatic hydrocarbon content <5 wt%, and polycyclic aromatic hydrocarbon content <1 wt%. Bench tests showed that this sustainable low-carbon fuel, compared to China VI No. 0 diesel, reduces fuel consumption by 2%, carbon emissions by 30%, and NOx emissions by 1%. x Emissions reduced by 15%.

[0047] In a specific embodiment, the additives include 45 wt% solvent oil, 17 wt% dispersion inhibitor, 15 wt% carrier agent, 1.0 wt% demulsifier, 0.6 wt% rust inhibitor, 0.4 wt% defoamer, 16 wt% low-temperature flow improver, and 5.0 wt% hydrogen donor;

[0048] Alternatively, the additives may include 43.5 wt% solvent oil, 18 wt% dispersion inhibitor, 18 wt% carrier agent, 0.6 wt% demulsifier, 0.7 wt% rust inhibitor, 0.2 wt% defoamer, 15 wt% low-temperature flow improver, and 4 wt% hydrogen donor;

[0049] Alternatively, the additives may include 47.5 wt% solvent oil, 15 wt% dispersion inhibitor, 14 wt% carrier agent, 1.2 wt% demulsifier, 1.0 wt% rust inhibitor, 0.3 wt% defoamer, 17 wt% low-temperature flow improver, and 4.0 wt% hydrogen donor.

[0050] This invention provides a method for preparing the sustainable low-carbon fuel described in the above technical solution, comprising the following steps:

[0051] Petroleum-based diesel and hydrocarbon-based biodiesel are mixed evenly to obtain a base fuel oil;

[0052] After heating a portion of the solvent oil to 40–50°C, it is mixed with a dispersion inhibitor, a carrier agent, a demulsifier, a rust inhibitor, a defoamer, a low-temperature flow modifier, a hydrogen donor, and the remaining solvent oil, and stirred for 2–3 hours to obtain the additive.

[0053] By blending base fuel oils with additives, sustainable low-carbon fuels can be obtained.

[0054] In this invention, 75-80% of the solvent oil is heated to 40-50°C; the remaining solvent oil accounts for 20-25% of the total solvent oil.

[0055] The method for preparing sustainable low-carbon fuel provided by this invention is simple and easy to industrialize.

[0056] To further illustrate the present invention, the following detailed description of a sustainable low-carbon fuel and its preparation method provided by the present invention is provided in conjunction with embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0057] Implementation Cases

[0058] Examples 1-3 and Comparative Examples 1-3

[0059] Basic fuel oil scheme:

[0060] The basic fuel oil specifications are as follows.

[0061] Table 1. Some Indicators of Basic Fuel Oil

[0062]

[0063]

[0064] Table 2 Comparison of Base Fuel Oils 1-3 and Base Fuel Oil Formulas (1-3)

[0065]

[0066] additive:

[0067] The list of additives selected is as follows.

[0068] Solvent oil: SA-1500;

[0069] Dispersion inhibitor: a mixture of polyisobutylene succinic anhydride and polyisobutylene succinimide in a mass ratio of 0.3:0.6;

[0070] Carrier: A mixture of nonylphenol polyoxypropylene ether and polyetheramine in a mass ratio of 0.3:0.8, wherein the hydroxyl value of nonylphenol polyoxypropylene ether is 55; the molecular weight of polyetheramine is 1080, the total amine content is 0.95 mg / g, and the primary amine accounts for 99.3% of the total amine content;

[0071] Demulsifier: Polyoxyethylene polyoxypropylene polyether, with an average molecular weight of 1500 and a hydroxyl value of 37.4 mgKOH / g;

[0072] Rust inhibitor: oil-soluble naphthenic acid imidazoline;

[0073] Defoamer: Polyoxyethylene polyoxypropylene pentaerythritol ether;

[0074] Low-temperature flow improver: a mixture of polyethylene vinyl acetate and light white oil in a mass ratio of 1:2;

[0075] Hydrogen donor: Tetrahydronaphthalene.

[0076] Table 3 Additives 1-3, Comparison of Additives 1-3 Additive Formulations

[0077]

[0078] Sustainable low-carbon fuel solutions: Based on the correspondence between base fuel oil 1-3 and additive 1-3, and the blending of base fuel oil comparison 1-3 and additive comparison 1-3.

[0079] Table 4 Fuel formulations for Examples 1-3 and Comparative Examples 1-3

[0080] Base fuel oil (mass fraction) 99.80％ 99.85％ 99.83％ 99.90％ 99.81％ - Additives (mass fraction) 0.20％ 0.15％ 0.17％ 0.10％ 0.19％ 0％ National VI emission standard 0# diesel (mass fraction) - - - - - 100％

[0081] Based on the design schemes in Tables 2, 3, and 4, fuels were prepared in Examples 1, 2, 3, Comparative Examples 1, 2, and 3. The preparation methods are as follows:

[0082] Example 1:

[0083] (1) Preparation method of basic fuel oil:

[0084] Petroleum-based diesel and hydrocarbon-based biodiesel are blended at a ratio of 50 vol%: 50 vol% and mixed evenly to obtain a base fuel oil.

[0085] (2) Preparation method of additives:

[0086] Add 36 wt% solvent oil to a reaction vessel, heat to 40-50°C, then add 17 wt% dispersion inhibitor, 15 wt% carrier agent, 1 wt% demulsifier, 0.6 wt% rust inhibitor, 0.4 wt% defoamer, 16 wt% low-temperature flow improver, 5 wt% hydrogen donor and the remaining 9 wt% solvent oil in sequence, and continue stirring for 2-3 hours to obtain the additive.

[0087] (3) A method for preparing a sustainable low-carbon fuel:

[0088] 99.8 wt% base fuel oil and 0.2 wt% additives were compounded and mixed evenly to obtain the fuel of Example 1.

[0089] Example 2:

[0090] (1) Preparation method of basic fuel oil:

[0091] Petroleum-based diesel and hydrocarbon-based biodiesel were blended at a ratio of 58 vol%: 42 vol% and mixed evenly to obtain a base fuel oil.

[0092] (2) Preparation method of additives:

[0093] Add 35 wt% solvent oil to a reaction vessel, heat to 40-50°C, then add 18 wt% dispersion inhibitor, 18 wt% carrier agent, 0.6 wt% demulsifier, 0.7 wt% rust inhibitor, 0.2 wt% defoamer, 15 wt% low-temperature flow improver, 4 wt% hydrogen donor and the remaining 8.5 wt% solvent oil in sequence, and continue stirring for 2-3 hours to obtain the additive.

[0094] (3) A method for preparing a sustainable low-carbon fuel:

[0095] 99.85 wt% base fuel oil and 0.15 wt% additive were compounded and mixed evenly to obtain the fuel of Example 2.

[0096] Example 3

[0097] (1) Preparation method of basic fuel oil:

[0098] Petroleum-based diesel and hydrocarbon-based biodiesel are blended at a ratio of 65 vol%: 35 vol% and mixed evenly to obtain a base fuel oil.

[0099] (2) Preparation method of additives:

[0100] Add 38 wt% solvent oil to a reaction vessel, heat to 40-50°C, then add 15 wt% dispersion inhibitor, 14 wt% carrier agent, 1.2 wt% demulsifier, 1.0 wt% rust inhibitor, 0.3 wt% defoamer, 17 wt% low-temperature flow improver, 4 wt% hydrogen donor and the remaining 9.5 wt% solvent oil in sequence, and continue stirring for 2-3 hours to obtain the additive.

[0101] (3) A method for preparing a sustainable low-carbon fuel:

[0102] 99.83 wt% base fuel oil and 0.17 wt% additive were compounded and mixed evenly to obtain the fuel of Example 3.

[0103] Comparative Example 1

[0104] (1) Preparation method of basic fuel oil:

[0105] Petroleum-based diesel and hydrocarbon-based biodiesel are blended at a ratio of 60 vol%: 40 vol% and mixed evenly to obtain a base fuel oil.

[0106] (2) Preparation method of additives:

[0107] Add 44 wt% solvent oil to a reaction vessel, heat to 40-50°C, then add 10 wt% dispersion inhibitor, 11 wt% carrier agent, 5 wt% demulsifier, 2 wt% rust inhibitor, 2 wt% defoamer, 14 wt% low-temperature flow improver, 1 wt% hydrogen donor and the remaining 11 wt% solvent oil in sequence, and continue stirring for 2-3 hours to obtain the additive.

[0108] (3) A method for preparing a sustainable low-carbon fuel:

[0109] 99.90 wt% base fuel oil and 0.10 wt% additive were compounded and mixed evenly to obtain the fuel of Comparative Example 1.

[0110] Comparative Example 2

[0111] (1) Preparation method of basic fuel oil:

[0112] Petroleum-based diesel and hydrocarbon-based biodiesel are blended at a ratio of 20 vol%: 80 vol% and mixed evenly to obtain a base fuel oil.

[0113] (2) Preparation method of additives:

[0114] Add 32 wt% solvent oil to a reaction vessel, heat to 40-50°C, then add 5 wt% dispersion inhibitor, 23 wt% carrier agent, 1 wt% demulsifier, 4 wt% rust inhibitor, 5 wt% defoamer, 20 wt% low temperature flow improver, 2 wt% hydrogen donor and the remaining 11 wt% solvent oil in sequence, and continue stirring for 2-3 hours to obtain the additive.

[0115] (3) A method for preparing a sustainable low-carbon fuel:

[0116] 99.81 wt% base fuel oil and 0.19 wt% additive were compounded and mixed evenly to obtain the fuel of Comparative Example 2.

[0117] Comparative Example 3

[0118] The diesel fuel sold on the market that meets the China VI emission standard is No. 0.

[0119] The fuel indicators of Examples 1-3 and Comparative Examples 1-3 are shown in Table 5:

[0120] Table 5. Fuel Indicators of Examples 1-3 and Comparative Examples 1-3

[0121]

[0122]

[0123] Low-temperature cold start test:

[0124] The test used a 6-cylinder 8.6L China VI diesel engine, and conducted a low-temperature cold start test in an environmental chamber (-20℃). The test results are as follows:

[0125] Table 6 Results of Low Temperature Cold Start Test

[0126] Can it be started? success success success fail success fail Startup time / s 1.6 2.0 1.8 - 1.9 - Ambient temperature / °C -19.8 -20.2 -20.1 -19.7 20.3 20.5 Fuel temperature / °C -14.2 -14.1 -13.8 -14.0 -14.3 -14.2

[0127] Examples 1-3 all started successfully in a low-temperature environment of -20°C; Comparative Examples 1-3 failed to start successfully.

[0128] Bench test:

[0129] The test used a 6-cylinder 8.6L China VI diesel engine for bench testing, performing WHSC test cycle tests. Carbon soot, NO... x The emissions are taken from the engine's original exhaust.

[0130] The bench test results are shown in Table 6:

[0131] Table 6. Bench Test Results

[0132]

[0133]

[0134] As shown in Table 6, the sustainable low-carbon fuels of Examples 1-3 have low soot and NO content. x Both emissions and fuel consumption rates are lower than those of the fuels in Comparative Examples 1–3. Compared to the China VI 0# diesel in Comparative Example 3, the sustainable low-carbon fuel reduces fuel consumption by 2%, carbon emissions by 30%, and NOx emissions by 30%. x Emissions reduced by 15%.

[0135] As can be seen from the above embodiments, the sustainable low-carbon fuel provided by the present invention comprises the following components: 99.8-99.85 wt% base fuel oil and 0.15-0.2 wt% additives; the base fuel oil comprises 48-68 vol% petroleum-based diesel and 32-52 vol% hydrocarbon-based biodiesel; the additives comprise 42-50 wt% solvent oil, 14-19 wt% dispersant inhibitor, 13-18 wt% carrier agent, 0.5-2 wt% demulsifier, 0.4-1 wt% rust inhibitor, 0.1-0.4 wt% defoamer, 14-18 wt% low-temperature flow improver, and 3-6 wt% hydrogen donor. It possesses excellent low-temperature start-up performance, is applicable to more application scenarios, and also has a low fuel consumption rate and low soot and NO emissions.x emission.

[0136] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sustainable low-carbon fuel, comprising the following components: Base fuel oil 99.8~99.85wt% and additives 0.15~0.2wt%; The base fuel oil comprises 48-68 vol% petroleum-based diesel and 32-52 vol% hydrocarbon-based biodiesel. The hydrocarbon-based biodiesel is an alkane obtained by hydrogenation of animal and vegetable oils; The additives include 42-50 wt% solvent oil, 14-19 wt% dispersant inhibitor, 13-18 wt% carrier agent, 0.5-2 wt% demulsifier, 0.4-1 wt% rust inhibitor, 0.1-0.4 wt% defoamer, 14-18 wt% low-temperature flow improver, and 3-6 wt% hydrogen donor; The dispersion inhibitor is a mixture of polyisobutylene succinic anhydride and polyisobutylene succinimide, wherein the acid value of polyisobutylene succinic anhydride is 100~110 mgKOH / g, and the base value of polyisobutylene succinimide is 22~28 mgKOH / g; the mass ratio of polyisobutylene succinic anhydride to polyisobutylene succinimide is 0.3:1~0.5:1; The carrier is a mixture of nonylphenol polyoxypropylene ether and polyetheramine. The hydroxyl value of nonylphenol polyoxypropylene ether is 46~56 mgKOH / g; the molecular weight of polyetheramine is 1000~1200, the total amine content is 0.90~0.95 mg / g, and the primary amine accounts for >99.0% of the total amine content; the mass ratio of nonylphenol polyoxypropylene ether to polyetheramine is 0.3:1~0.5:

1. The demulsifier is polyoxyethylene polyoxypropylene polyether, with the molecular structural formula C6H. 17 N4-[CH2CH2O] m -[CH(CH3)CH2O] n -H, where m=10~12, n=14~16, molecular weight is 1400~1600, and hydroxyl value is 36~38 mgKOH / g; The rust inhibitor is an oil-soluble naphthenic acid imidazoline; The defoamer is selected from polyoxyethylene polyoxypropylene pentaerythritol ether; The low-temperature flow improver is a mixture of polyethylene vinyl acetate and light white oil in a mass ratio of 1:

2. The hydrogen donor is tetrahydronaphthalene; The sustainable low-carbon fuel has a distillation range of 160~350℃, a pour point <-22℃, a cold filter plugging point <-16℃, a cetane number >52, a flash point >60℃, and a density of 810~830 kg / m³. 3 It has a low calorific value >43.0 MJ / kg, a total aromatic hydrocarbon content <5 wt%, and a polycyclic aromatic hydrocarbon content <1 wt%.

2. The sustainable low-carbon fuel according to claim 1, characterized in that, The petroleum-based diesel fuel has a distillation range of 160~350℃, a pour point <-10℃, a cold filter plugging point <-5℃, a cetane number >46, a flash point >60℃, and a density of 830~850 kg / m³. 3 Low calorific value >42.8MJ / kg, cycloalkanes content >60wt%, total aromatics content <5wt%, polycyclic aromatics content <1wt%.

3. The sustainable low-carbon fuel according to claim 1, characterized in that, The hydrocarbon-based biodiesel has a distillation range of 170~350℃, a pour point <-10℃, a cold filter plugging point <-5℃, a cetane number >62, a flash point >60℃, and a density of 760~800 kg / m³. 3 Low calorific value >43MJ / kg, total aromatic hydrocarbon content <3wt%, polycyclic aromatic hydrocarbon content <1wt%.

4. The sustainable low-carbon fuel according to claim 1, characterized in that, The solvent oil is an aromatic solvent with a distillation range of 180~210℃, a flash point of >60℃, and an aromatic content of >99.0wt%.

5. The sustainable low-carbon fuel according to claim 1, characterized in that, The hydrocarbon-based biodiesel is an alkane produced by hydrogenation of waste animal and vegetable oils.

6. A method for preparing the sustainable low-carbon fuel according to any one of claims 1 to 5, comprising the following steps: Petroleum-based diesel and hydrocarbon-based biodiesel are mixed evenly to obtain a base fuel oil; After heating a portion of the solvent oil to 40-50°C, it is mixed with a dispersion inhibitor, a carrier agent, a demulsifier, a rust inhibitor, a defoamer, a low-temperature flow modifier, a hydrogen donor, and the remaining solvent oil, and stirred for 2-3 hours to obtain the additive. By blending base fuel oils with additives, sustainable low-carbon fuels can be obtained.

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