Vehicle fuel for replacing gasoline and production process of vehicle fuel

Abstract

The invention discloses a vehicle fuel replacing gasoline and a production process thereof, and belongs to the technical field of alcohol-based fuel processing, fluorinated graphene is subjected to bimetal framework modification treatment, then silicon dioxide is deposited on the surface of the fluorinated graphene through a sol-gel method, and a compact physical barrier can be formed through formation of the silicon dioxide, so that the vehicle fuel can replace gasoline. The direct contact between oxygen and fuel molecules is blocked, the temperature resistance of silicon dioxide is combined with the high temperature resistance of fluorinated graphene, so that the structure of a high-temperature area of an automobile engine is kept stable, carbon deposition caused by high-temperature decomposition is avoided, the combustion performance is excellent under conventional conditions, meanwhile, the corrosion performance effect is obvious due to participation of fluorinated graphene, and the service life of the automobile engine is prolonged. Under waterproof and low-temperature conditions, the coating still has excellent combustion and efficient corrosion resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of alcohol-based fuel processing, and particularly relates to a vehicle fuel for replacing gasoline and its production process. Background Art

[0002] Methanol, as a fuel with high oxygen content, high octane number, wide raw material sources, and can effectively reduce pollutant emissions, is one of the alternative fuels for gasoline. In the automotive field, since methanol is an acute solvent for the automotive engine system, it is easy to cause swelling of engine rubber. And during the production process of methanol, a small amount of acidic substances are inevitably generated. When alcohol contacts air, a small amount of organic acids will also be generated due to oxidation. These acidic substances will cause corrosion to the metal parts of the engine. Moreover, alcohol products themselves have strong water absorption, and will absorb trace amounts of water in the air during storage and transportation, and the corrosion will be aggravated due to electrochemical action, which seriously affects the service life of automotive engines.

[0003] At the present stage, new automotive engine systems have been developed to address the corrosion problem of alcohol-based fuels to engines. However, the R & D cost of this system is high, and the replacement cost for already produced vehicles is even greater, which is not conducive to practical development and application. Therefore, for the improvement of alcohol-based fuels, by compounding methanol and gasoline and adding some additives, while ensuring energy conservation and environmental protection, reducing the corrosion and damage to the engine system is an important research and development direction.

[0004] Chinese Patent CN118931605B discloses an ether-based vehicle clean fuel and its preparation method. Based on doped cerium / yttrium flaky graphene agent, the flaky graphene is treated with potassium permanganate solution and combined with thermal improvement to optimize the activity efficiency of graphene. However, the oxidation of potassium permanganate will introduce a large number of oxygen-containing groups on the surface of graphene, damaging the integrity of the sp 2 carbon network. Summary of the Invention

[0005] The purpose of the present invention is to provide a vehicle fuel for replacing gasoline and its production process. By performing a dual-metal framework modification treatment on fluorinated graphene, it has excellent combustion performance under normal conditions. At the same time, the participation of fluorinated graphene makes its corrosion resistance effect obvious, and it still has excellent combustion and high-efficiency anti-corrosion performance under waterproof and low-temperature conditions.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A production process of a vehicle fuel for replacing gasoline, comprising the following steps:

[0008] Step 1: Add cerium-loaded graphene fluoride and a yttrium nitrate solution with a mass fraction of 20 - 30% into a reaction kettle, stir at 20 - 25 °C and 400 - 500 r / min for 20 - 30 min. Then dissolve sodium dodecyl sulfate in an ethanol solution of 70 - 80 wt% and add it together with 2,5-diaminoterephthalic acid into the reaction kettle, stir at 120 - 130 °C and 400 - 500 r / min for 4 - 5 h, carry out suction filtration, wash the filter cake with deionized water and absolute ethanol 2 - 3 times respectively, dry it in vacuum at 60 - 80 °C for 1 - 2 h, transfer the product to a muffle furnace, and calcine it at 550 - 600 °C for 4 - 5 h under nitrogen protection to obtain cerium- and yttrium-modified graphene fluoride.

[0009] Step 2: Stir and mix methanol, base oil, co-solvent n-butanol, heat enhancer nitrocellulose, pour point depressant lauryl methacrylate, cerium- and yttrium-modified graphene fluoride and inhibitor to obtain a vehicle fuel that substitutes gasoline.

[0010] Furthermore, the dosage ratio of cerium-loaded graphene fluoride, yttrium nitrate solution, sodium dodecyl sulfate, ethanol solution and 2,5-diaminoterephthalic acid is 30 - 40 g : 420 - 500 mL : 12 - 14 mL : 120 - 150 mL : 30 - 40 g.

[0011] Furthermore, the dosage ratio of methanol, base oil, n-butanol, nitrocellulose, lauryl methacrylate, cerium- and yttrium-modified graphene fluoride and inhibitor is 120 - 140 g : 30 - 40 g : 2 - 5 g : 4 - 6 g : 3 - 5 g : 12 - 14 g : 1 - 2 g.

[0012] Furthermore, the inhibitor is obtained by stirring and mixing 4 - 8 g of alkoxylated fatty alcohol, 10 - 12 g of 2,6-di-tert-butyl-p-cresol, 2 - 6 g of 3-mercaptopropionic acid, 6 - 8 g of polyoxyethylene laurate, 8 - 10 g of 2,6-dimethylmorpholine, 3 - 5 g of sodium dimethyldithiocarbamate and 20 - 30 g of solvent gasoline No. 120.

[0013] Furthermore, the preparation steps of cerium-loaded graphene fluoride are as follows:

[0014] Add modified graphene fluoride, 5-hydroxyisophthalic acid and deionized water into a reaction kettle, dissolve sodium dodecyl sulfate in an ethanol solution of 70 - 80 wt% and add it into the reaction kettle, stir at 120 - 130 °C and 400 - 500 r / min for 1 - 2 h, add cerium nitrate into the reaction kettle, continue stirring and reacting for 4 - 5 h, carry out suction filtration, wash the filter cake with deionized water and absolute ethanol 2 - 3 times respectively, dry it in vacuum at 60 - 80 °C for 1 - 2 h to obtain cerium-loaded graphene fluoride.

[0015] Furthermore, the dosage ratio of modified fluorinated graphene, 5-hydroxyisophthalic acid, deionized water, sodium dodecyl sulfate, ethanol solution and cerium nitrate is 40 - 50 g : 20 - 30 g : 800 - 900 mL : 5 - 7 g : 120 - 150 mL : 20 - 30 mL.

[0016] Furthermore, the preparation steps of the modified fluorinated graphene are as follows:

[0017] Add the fluorinated graphene and the ethanol solution into a reaction kettle, stir for 20 - 30 min under the conditions of 20 - 25 °C and 500 - 600 r / min, then add ammonia water with a mass fraction of 30 - 40% to adjust the pH value to 9 - 10, then add tetraethyl orthosilicate, and continue to stir and react for 20 - 24 h, so that the tetraethyl orthosilicate hydrolyzes in an alkaline environment to form nano - SiO₂ particles and is loaded on the surface of the fluorinated graphene, filter, wash the filter cake with deionized water and absolute ethanol respectively for 2 - 3 times, and vacuum - dry at 60 - 80 °C for 1 - 2 h to obtain the modified fluorinated graphene.

[0018] Furthermore, the dosage ratio of fluorinated graphene, ethanol solution, ammonia water and tetraethyl orthosilicate is 50 - 60 g : 800 - 900 mL : 12 - 14 mL : 70 - 80 mL.

[0019] Advantages of the present invention:

[0020] 1. The vehicle fuel substituting gasoline prepared by the present invention has excellent combustion value performance under conventional conditions. At the same time, the participation of fluorinated graphene makes its anti - corrosion performance obvious, and it still has excellent combustion and high - efficiency anti - corrosion performance under waterproof and low - temperature conditions.

[0021] 2. For the modified fluorinated graphene of the present invention, silica is deposited on the surface of the fluorinated graphene by the sol - gel method. The formation of silica can form a dense physical barrier to block the direct contact between oxygen and fuel molecules, and extend the gasoline oxidation induction period by more than 40%. The combination of the heat - resistance of silica and the high - temperature resistance of fluorinated graphene keeps the structure stable in the high - temperature area of the automobile engine and avoids carbon deposition caused by high - temperature decomposition; the silica loaded on the surface of the fluorinated graphene can increase the anchoring of catalytically active components such as cerium and yttrium, and promote the complete combustion of hydrocarbons through redox cycles. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Example 1: A production process of a vehicle fuel substituting gasoline, comprising the following steps:

[0024] S1: Add 50 g of fluorinated graphene and 800 mL of ethanol solution into a reaction kettle, stir for 20 min under the conditions of 20 °C and 500 r / min, then add 12 mL of ammonia water with a mass fraction of 30% to adjust the pH value to 9, then add 70 mL of tetraethyl orthosilicate, continue to stir and react for 20 h, so that tetraethyl orthosilicate hydrolyzes in an alkaline environment to form nano-SiO₂ particles and is loaded on the surface of fluorinated graphene, filter, wash the filter cake twice with deionized water and anhydrous ethanol respectively, and vacuum dry at 60 °C for 1 h to obtain modified fluorinated graphene.

[0025] S2: Add 40 g of modified fluorinated graphene, 20 g of 5-hydroxyisophthalic acid and 800 mL of deionized water into a reaction kettle, dissolve 5 g of sodium dodecyl sulfate in 120 mL of 70 wt% ethanol solution and then add it into the reaction kettle, stir for 1 h under the conditions of 120 °C and 400 r / min, add 20 mL of cerium nitrate into the reaction kettle, continue to stir and react for 4 h, carry out suction filtration, wash the filter cake twice with deionized water and anhydrous ethanol respectively, and vacuum dry at 60 °C for 1 h to obtain a cerium-loaded fluorinated graphene framework.

[0026] S3: Add 30 g of the cerium-loaded fluorinated graphene framework and 420 mL of a yttrium nitrate solution with a mass fraction of 20% into a reaction kettle, stir for 20 min under the conditions of 20 °C and 400 r / min, then dissolve 12 mL of sodium dodecyl sulfate in 120 mL of 70 wt% ethanol solution and add it into the reaction kettle together with 30 g of 2,5-diaminoterephthalic acid, stir for 4 h under the conditions of 120 °C and 400 r / min, carry out suction filtration, wash the filter cake twice with deionized water and anhydrous ethanol respectively, vacuum dry at 60 °C for 1 h, transfer the product to a muffle furnace, and calcine at 550 °C for 4 h under nitrogen protection to obtain cerium-yttrium modified fluorinated graphene.

[0027] S4: Stir and mix 120 g of methanol, 30 g of base oil, 2 g of cosolvent n-butanol, 4 g of heat enhancer nitrocellulose, 3 g of pour point depressant lauryl methacrylate, 12 g of cerium-yttrium modified fluorinated graphene and 1 g of inhibitor to obtain a vehicle fuel substituting gasoline.

[0028] Among them, the inhibitor is obtained by stirring and mixing 4 g of alkoxylated fatty alcohol, 10 g of 2,6-di-tert-butyl-p-cresol, 2 g of 3-mercaptopropionic acid, 6 g of polyoxyethylene laurate, 8 g of 2,6-dimethylmorpholine, 3 g of sodium dimethyldithiocarbamate and 20 g of No. 120 solvent gasoline.

[0029] Example 2: A production process of a vehicle fuel substituting gasoline, comprising the following steps:

[0030] S1: Add 55 g of fluorinated graphene and 850 mL of ethanol solution into a reaction kettle, stir for 25 min under the conditions of 23 °C and 550 r / min, then add 13 mL of ammonia water with a mass fraction of 35% to adjust the pH value to 9.5, and then add 75 mL of tetraethyl orthosilicate. Continue to stir and react for 22 h, so that tetraethyl orthosilicate hydrolyzes in an alkaline environment to form nano-SiO₂ particles and load on the surface of fluorinated graphene. Filter, wash the filter cake twice with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 70 °C for 1.5 h to obtain modified fluorinated graphene.

[0031] S2: Add 45 g of modified fluorinated graphene, 25 g of 5-hydroxyisophthalic acid and 850 mL of deionized water into a reaction kettle. Dissolve 6 g of sodium dodecyl sulfate in 135 mL of 75 wt% ethanol solution and then add it into the reaction kettle. Stir for 1.5 h under the conditions of 125 °C and 450 r / min, add 25 mL of cerium nitrate into the reaction kettle, and continue to stir and react for 4.5 h. Filter by suction, wash the filter cake twice with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 70 °C for 1.5 h to obtain cerium-supported fluorinated graphene framework.

[0032] S3: Add 35 g of cerium-supported fluorinated graphene framework and 460 mL of yttrium nitrate solution with a mass fraction of 25% into a reaction kettle, stir for 25 min under the conditions of 23 °C and 450 r / min. Then dissolve 13 g of sodium dodecyl sulfate in 135 mL of 75 wt% ethanol solution and add it into the reaction kettle together with 35 g of 2,5-diaminoterephthalic acid. Stir for 4.5 h under the conditions of 125 °C and 450 r / min. Filter by suction, wash the filter cake twice with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 70 °C for 1.5 h. Transfer the product to a muffle furnace, and calcine it at 575 °C for 4.5 h under nitrogen protection to obtain cerium-yttrium modified fluorinated graphene.

[0033] S4: Stir and mix 130 g of methanol, 35 g of base oil, 3.5 g of co-solvent n-butanol, 5 g of heat enhancer nitrocellulose, 4 g of pour point depressant lauryl methacrylate, 13 g of cerium-yttrium modified fluorinated graphene and 1.5 g of inhibitor to obtain a vehicle fuel substituting gasoline.

[0034] Among them, the inhibitor is obtained by stirring and mixing 6 g of alkoxylated fatty alcohol, 11 g of 2,6-di-tert-butyl-p-cresol, 4 g of 3-mercaptopropionic acid, 7 g of polyoxyethylene laurate, 9 g of 2,6-dimethylmorpholine, 4 g of sodium dimethyldithiocarbamate and 25 g of No. 120 solvent gasoline.

[0035] Example 3: A production process of a vehicle fuel substituting gasoline, comprising the following steps:

[0036] S1: Add 60 g of fluorinated graphene and 900 mL of ethanol solution into a reaction kettle, stir for 30 min at 25 °C and 600 r / min, then add 14 mL of ammonia water with a mass fraction of 40% to adjust the pH value to 10, then add 80 mL of tetraethyl orthosilicate, and continue to stir and react for 24 h, so that tetraethyl orthosilicate hydrolyzes in an alkaline environment to form nano-SiO2 particles and load them on the surface of fluorinated graphene. Filter, wash the filter cake 3 times with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 80 °C for 2 h to obtain modified fluorinated graphene.

[0037] S2: Add 50 g of modified fluorinated graphene, 30 g of 5-hydroxyisophthalic acid and 900 mL of deionized water into a reaction kettle. Dissolve 7 g of sodium dodecyl sulfate in 150 mL of 80 wt% ethanol solution and then add it into the reaction kettle. Stir at 130 °C and 500 r / min for 2 h, add 30 mL of cerium nitrate into the reaction kettle, and continue to stir and react for 5 h. Filter by suction, wash the filter cake 3 times with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 80 °C for 2 h to obtain fluorinated graphene supported cerium framework.

[0038] S3: Add 40 g of fluorinated graphene supported cerium framework and 500 mL of yttrium nitrate solution with a mass fraction of 30% into a reaction kettle, stir at 25 °C and 500 r / min for 30 min, then dissolve 14 g of sodium dodecyl sulfate in 150 mL of 80 wt% ethanol solution and add it into the reaction kettle together with 40 g of 2,5-diaminoterephthalic acid. Stir at 130 °C and 500 r / min for 5 h. Filter by suction, wash the filter cake 3 times with deionized water and anhydrous ethanol respectively, and dry it in vacuum at 80 °C for 2 h. Transfer the product to a muffle furnace, and under nitrogen protection, heat it to 600 °C and calcine it for 5 h to obtain cerium-yttrium modified fluorinated graphene.

[0039] S4: Stir and mix 140 g of methanol, 40 g of base oil, 5 g of co-solvent n-butanol, 6 g of heat enhancer nitrocellulose, 5 g of pour point depressant lauryl methacrylate, 14 g of cerium-yttrium modified fluorinated graphene and 2 g of inhibitor to obtain a vehicle fuel substituting gasoline.

[0040] Among them, the inhibitor is obtained by stirring and mixing 8 g of alkoxylated fatty alcohol, 12 g of 2,6-di-tert-butyl-p-cresol, 6 g of 3-mercaptopropionic acid, 8 g of polyethylene glycol laurate, 10 g of 2,6-dimethylmorpholine, 5 g of sodium dimethyldithiocarbamate and 30 g of solvent gasoline No. 120.

[0041] Comparative Example 1: Different from Example 3, the fluorinated graphene in S1 is replaced with graphene oxide.

[0042] Comparative Example 2: Different from Example 3, 5-hydroxyisophthalic acid is not added in S2.

[0043] Comparative Example 3: Different from Example 3, 2,5-diaminoterephthalic acid is not added in S3.

[0044] The vehicle fuels substituting gasoline obtained in Examples 1 - 3 and Comparative Examples 1 - 3 were tested under conventional conditions. And 5% of water was added to the test products to test the waterproof property of the products, and the products were stored at -5°C for 1 month to test the low-temperature stability of the products. The tests were carried out with reference to the standard of GB / T5096. The results are shown in Table 1:

[0045] Table 1 Test result table of the product performance of the vehicle fuel substituting gasoline

[0046]

[0047] As can be seen from Table 1, the vehicle fuels obtained in Examples 1 - 3 have excellent calorific value performance under conventional conditions, and at the same time, the oxidation corrosion performance is obvious. The products can achieve coordinated improvement of oxidation corrosion and calorific value, and still have excellent combustion and oxidation corrosion performance under waterproof and low-temperature conditions.

[0048] In Comparative Example 1, graphene fluoride in S1 was replaced with graphene oxide. As can be seen from the table, after graphene fluoride was replaced with graphene oxide, the oxidation corrosion rate of the copper sheet increased significantly, and the increased amplitude was also significantly faster than that of other groups.

[0049] In Comparative Example 2, 5-hydroxyisophthalic acid was not added, and the cerium metal framework could not be formed. Through the metal framework, the effective fixation and dispersion of cerium could be achieved, making it easier for cerium ions to penetrate into the lattice defect sites of graphene to form Ce - O - C bonds and fill the broken sp 2 carbon network.

[0050] In Comparative Example 3, 2,5-diaminoterephthalic acid was not added, and the yttrium metal framework could not be formed. After the doping of yttrium, a stable Y - O - Ce structure was formed, which inhibited the migration and aggregation of oxygen vacancies and improved the combustion efficiency of the fuel.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A production process of a vehicle fuel substituting gasoline, characterized in that, It includes the following steps: Step 1: Add cerium-loaded graphene fluoride and a 20-30 wt% yttrium nitrate solution into a reaction kettle, stir at 20-25 °C and 400-500 r / min for 20-30 min, then dissolve sodium dodecyl sulfate in a 70-80 wt% ethanol solution and add it together with 2,5-diaminoterephthalic acid into the reaction kettle, stir at 120-130 °C and 400-500 r / min for 4-5 h, carry out suction filtration, washing, and vacuum drying, transfer the product to a muffle furnace, and calcine it at 550-600 °C for 4-5 h under nitrogen protection to obtain cerium-yttrium modified graphene fluoride; Step 2: Stir and mix methanol, base oil, cosolvent n-butanol, heat enhancer nitrocellulose, pour point depressant lauryl methacrylate, cerium-yttrium modified graphene fluoride, and inhibitor to obtain a vehicle fuel substituting gasoline.

2. The production process of a vehicle fuel substituting gasoline according to claim 1, characterized in that, The dosage ratio of the cerium-loaded graphene fluoride, yttrium nitrate solution, sodium dodecyl sulfate, ethanol solution, and 2,5-diaminoterephthalic acid is 30-40 g: 420-500 mL: 12-14 mL: 120-150 mL: 30-40 g.

3. The production process of a vehicle fuel substituting gasoline according to claim 1, characterized in that, The dosage ratio of the methanol, base oil, n-butanol, nitrocellulose, lauryl methacrylate, cerium-yttrium modified graphene fluoride, and inhibitor is 120-140 g: 30-40 g: 2-5 g: 4-6 g: 3-5 g: 12-14 g: 1-2 g.

4. The production process of a vehicle fuel substituting gasoline according to claim 1, characterized in that The inhibitor is obtained by stirring and mixing 4-8 g of alkoxylated fatty alcohol, 10-12 g of 2,6-di-tert-butyl-p-cresol, 2-6 g of 3-mercaptopropionic acid, 6-8 g of polyoxyethylene laurate, 8-10 g of 2,6-dimethylmorpholine, 3-5 g of sodium dimethyldithiocarbamate, and 20-30 g of solvent gasoline No.

120.

5. The production process of a vehicle fuel substituting gasoline according to claim 1, characterized in that, The preparation steps of the cerium-loaded graphene fluoride are as follows: Add modified graphene fluoride, 5-hydroxyisophthalic acid, and deionized water into a reaction kettle, dissolve sodium dodecyl sulfate in a 70-80 wt% ethanol solution and add it into the reaction kettle, stir at 120-130 °C and 400-500 r / min for 1-2 h, add cerium nitrate into the reaction kettle, continue stirring and reacting for 4-5 h, carry out suction filtration, washing, and vacuum drying to obtain cerium-loaded graphene fluoride.

6. The production process of a vehicle fuel substituting gasoline according to claim 5, characterized in that, The dosage ratio of the modified graphene fluoride, 5-hydroxyisophthalic acid, deionized water, sodium dodecyl sulfate, ethanol solution, and cerium nitrate is 40-50 g: 20-30 g: 800-900 mL: 5-7 g: 120-150 mL: 20-30 mL.

7. The production process of a vehicle fuel substituting gasoline according to claim 5, characterized in that, The preparation steps of the modified graphene fluoride are as follows: Add graphene fluoride and ethanol solution into a reaction kettle, stir for 20 - 30 min under the conditions of 20 - 25 °C and 500 - 600 r / min, then add 30 - 40 wt% ammonia water to adjust the pH value to 9 - 10, then add tetraethyl orthosilicate, and continue to stir and react for 20 - 24 h, so that tetraethyl orthosilicate hydrolyzes in an alkaline environment to form nano-SiO2 particles and is loaded on the surface of graphene fluoride, filter, wash, and dry in vacuum to obtain modified graphene fluoride.

8. The production process of a vehicle fuel substituting gasoline according to claim 7, characterized in that, The dosage ratio of the graphene fluoride, ethanol solution, ammonia water and tetraethyl orthosilicate is 50 - 60 g : 800 - 900 mL : 12 - 14 mL : 70 - 80 mL.

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