Self-initiation high-power high-energy liquid fuel and preparation method thereof

Abstract

The invention provides a self-initiating high-power high-energy liquid fuel and a preparation method thereof. The self-initiating high-power high-energy liquid fuel comprises the following components in percentage by weight: 10-50wt% of aluminum alkyl; 40 to 75 wt% of a main fuel; 10 to 35 wt% of an oxygenated fuel; the main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds; the oxygen-containing fuel is polyoxymethylene dialkyl ether. According to the high-energy liquid fuel provided by the invention, the aluminum alkyl is used for providing detonation temperature, the aluminum alkyl is dissolved in the main fuel and does not settle, aggregate or deteriorate after long-term storage, and the high-energy liquid fuel has good storage stability; and the aluminum alkyl has lower detonation energy and higher combustion energy, so that the detonation temperature of the high-energy liquid fuel can be effectively ensured. The polyoxymethylene dialkyl ether not only ensures the oxygen content of the fuel, but also can improve the burning and explosion rate of the high-energy liquid fuel, better exerts the energy of the high-energy liquid fuel, and further improves the burning and explosion performance of the high-energy liquid fuel.

Description

Technical Field

[0001] The invention relates to the field of fuel technology, in particular to a self-igniting high-energy liquid fuel with great power and a preparation method thereof. Background Art

[0002] High-energy liquid fuel is a liquid fuel with development prospects. Its detonation energy is much higher than the energy released by the same mass of explosives. It is mainly achieved by scattering the fuel into the air, atomizing the fuel droplets and fully mixing with the air to form a cloud, and then using a secondary fuse to implement strong initiation, detonating the cloud containing the fuel droplets, and using high temperature, high pressure and strong shock waves to destroy the target; and the shock waves are reflected and superimposed between the walls, and the overpressure value is much higher than that in open spaces.

[0003] High-energy liquid fuels are mainly composed of ethylene oxide, propylene oxide, cyclopentene or bridged ring compounds, and sensitizers are mostly nitrate nitro compounds such as isopropyl nitrate and isobutyl nitrate or nitromethane. In order to increase the detonation temperature, detonation velocity and killing radius of high-energy liquid fuels and enhance their killing ability against soft targets, the prior art generally adds metal powders such as aluminum to the fuel to increase the detonation temperature. However, solid metal powders cannot be effectively dispersed in liquid hydrocarbons and related fuels, and their high surface energy (the smaller the particles of the metal powder, the higher the surface energy, the faster its combustion rate, and the better the effect of increasing the detonation temperature in a short time) causes it to be very easy to flocculate, which greatly affects its stability during storage and use. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a self-igniting high-energy liquid fuel with high power and a preparation method thereof. The high-energy liquid fuel provided by the present invention has excellent stability and combustion performance, high calorific value, high detonation power, and does not require a secondary initiator.

[0005] The present invention provides a high-energy liquid fuel, which does not contain a secondary initiator and includes the following components in percentage:

[0006] 10-50 wt% aluminum alkyl;

[0007] 40-75wt% main fuel;

[0008] 10-35wt% oxygenated fuel;

[0009] The main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds;

[0010] The oxygen-containing fuel is polymethoxy dialkyl ether.

[0011] Preferably, the alkylaluminum includes one or more of trimethylaluminum, triethylaluminum, tripropylaluminum, diisopropylaluminum hydride, diisobutylaluminum hydride and tris(dimethylamino)aluminum dimer.

[0012] Preferably, the alkylaluminum is triethylaluminum.

[0013] Preferably, the main fuel includes, but is not limited to, one or more of normal alkanes with a carbon number not exceeding 12, isoalkanes with a carbon number not exceeding 12, non-terminal olefins with a carbon number not exceeding 12, saturated hydrocarbons with a carbon number not exceeding 14 and containing a benzene ring, dispirocyclic hydrocarbons with a carbon number not exceeding 18, trispirocyclic hydrocarbons with a carbon number not exceeding 18, di-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tri-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tetra-bridged cyclic hydrocarbons with a carbon number not exceeding 18, and bridged and parallel cyclic hydrocarbons with a carbon number not exceeding 18.

[0014] Preferably, the main fuel comprises a mixture of JP-10 and 2,3-dimethylbutane.

[0015] Preferably, the methoxyl polymerization degree of the polymethoxy dialkyl ether is 1-20.

[0016] Preferably, the alkyl group in the polymethoxydialkyl ether is one or two of a saturated normal alkane having 1 to 16 carbon atoms, an isoalkane having 3 to 16 carbon atoms, and an aromatic substituted alkyl group.

[0017] The present invention provides a method for preparing the high-energy liquid fuel described in the above technical solution, comprising the following steps:

[0018] mixing the main fuel and the oxygenated fuel in a dry environment to obtain a premixed liquid;

[0019] In a protective atmosphere, the premixed liquid is mixed with alkyl aluminum to obtain the self-igniting high-energy liquid fuel with great power.

[0020] Preferably, the protective atmosphere is nitrogen.

[0021] The present invention provides a self-initiating high-energy liquid fuel with high power, which does not contain a secondary initiator and includes the following components in percentage: 10-50wt% alkyl aluminum; 40-75wt% main fuel; 10-35wt% oxygen-containing fuel; the main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds; the oxygen-containing fuel is polymethoxy dialkyl ether. The high-energy liquid fuel provided by the present invention is a formula that can balance stability and detonation performance. Alkyl aluminum is used as a high-energy auxiliary agent to provide the detonation temperature. Compared with aluminum insoluble in hydrocarbon solvents, alkyl aluminum shows efficient dissolution in the main fuel and is a transparent liquid soluble in hydrocarbon solvents. It has a long storage time in the liquid system formed by the main fuel and the oxygen-containing fuel and can be stored for a long time without sedimentation, aggregation or deterioration under the condition of being isolated from air and water vapor, and has good storage stability. In addition, the alkyl aluminum has a lower detonation energy and a higher combustion energy. The combustion heat of the alkyl aluminum is greater than 40 MJ / kg, which is higher than 29.7 MJ / kg of ethylene oxide and 32.5 MJ / kg of propylene oxide, thereby ensuring the detonation temperature of the high-energy liquid fuel. In addition, the polymethoxy dialkyl ether as the oxygen-containing fuel not only ensures the oxygen content, but also can increase the combustion rate of the high-energy liquid fuel, better exert the energy of the high-energy liquid fuel, enhance the detonation effect in an oxygen-deficient environment, and further improve the combustion performance of the high-energy liquid fuel. It also reduces the sedimentation or aggregation of ultrafine powder in the organic fuel. Therefore, the high-energy liquid fuel provided by the present invention has a good balance between stability and combustion performance. Moreover, the initiation mode of the high-energy liquid fuel provided by the present application is a one-time initiation. After the monomer of the high-energy liquid fuel breaks down to produce a cloud, the alkyl aluminum component can quickly self-ignite in the air without catalysis and physical induction, thus playing the role of a self-detonating fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the test result of the stability experiment 1 at 50℃ for 48 hours;

[0023] Figure 2 This is the test result of the stability experiment 1 at -40℃ for 48 hours;

[0024] Figure 3 This is the test result of the stability test 1 with constant temperature oscillation at 70℃ for 2 hours;

[0025] Figure 4 This is the test result of the stability experiment 1 with constant temperature oscillation at -55℃ for 2 hours;

[0026] Figure 5 This is the test result of stability experiment 2 at 50℃ for 48 hours;

[0027] Figure 6 This is the test result of the stability experiment 2 at -40℃ for 48 hours;

[0028] Figure 7 This is the test result of the stability experiment 2 with constant temperature oscillation at 70℃ for 2 hours;

[0029] Figure 8 This is the test result of the stability experiment 2 with constant temperature oscillation at -55℃ for 2 hours. DETAILED DESCRIPTION

[0030] The present invention provides a self-initiating high-energy liquid fuel with high power, which does not contain a secondary initiator and includes the following components in percentage:

[0031] 10-50 wt% aluminum alkyl;

[0032] 40-75wt% main fuel;

[0033] 10-35wt% oxygenated fuel;

[0034] The main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds;

[0035] The oxygen-containing fuel is polymethoxy dialkyl ether.

[0036] The high-energy liquid fuel provided by the present invention comprises alkyl aluminum with a percentage of 10-50wt%, which can be specifically 10, 13, 15, 20, 22, 25, 30, 35, 37, 40, 45 or 50wt% in the embodiments of the present invention. There are mainly two technologies for initiating high-energy liquid fuel: secondary initiation technology or primary initiation technology. For the secondary initiation technology, the first initiation is used to blast the container and scatter the fuel, and the second initiation is used to ignite the fuel cloud to form a detonation. For the primary initiation technology, compared with the secondary initiation, the primary initiation is simpler and has lower cost. The characteristic of the primary initiation is that the shock wave generated by the external energy is used to synchronously induce the detonation of the fuel (such as electric sparks or initiators), or the fuel component itself releases heat to gradually induce the detonation of the fuel (such as chemical catalysis, photocatalysis or thermal turbulent jet initiation method, etc.). The present invention is a high-energy liquid fuel with a one-time initiation technology, and its detonation model is a deflagration-to-detonation transition (DDT) model. After the high-energy liquid fuel provided by the present invention generates a cloud, the alkyl aluminum component (represented by triethyl aluminum and diisobutyl aluminum hydride) in the fuel can quickly self-ignite in the air, playing the role of self-detonation fuel. The present invention is the first reported scheme that does not rely on catalysis and physical induction, but simply relies on the spontaneous reaction of fuel components to induce detonation.

[0037] In the present invention, the alkyl aluminum is an alkyl aluminum, a dialkyl aluminum or a trialkyl aluminum, preferably including one or more of trimethyl aluminum, triethyl aluminum, tripropyl aluminum, diisopropyl aluminum hydride, diisobutyl aluminum hydride and tris(dimethylamino) aluminum dimer, preferably triethyl aluminum. In the present invention, the heat of combustion of the trimethyl aluminum is 44.0 MJ / kg, the heat of combustion of triethyl aluminum is 42.7 MJ / kg, the heat of combustion of tripropyl aluminum is 45.5 MJ / kg, the heat of combustion of diisobutyl aluminum hydride is 45.1 MJ / kg, and the heat of combustion of tris(dimethylamino) aluminum dimer is 41.9 MJ / kg.

[0038] The alkyl aluminum (represented by triethyl aluminum and diisobutyl aluminum hydride) in the high-energy liquid fuel provided by the present invention is a transparent liquid soluble in hydrocarbon compounds, and will not precipitate after being mixed with hydrocarbons and oxygen-containing fuels, and can be stored for a long time without deterioration, sedimentation and aggregation under the condition of being isolated from air and water vapor. In addition, the alkyl aluminum has a low detonation energy and a high combustion energy, and the combustion heat of the alkyl aluminum is greater than 40 MJ / kg, which is higher than 29.7 MJ / kg of ethylene oxide and 32.5 MJ / kg of propylene oxide, and can achieve a better balance between detonation energy and storage stability.

[0039] In the present invention, the alkyl aluminum can spontaneously combust in the air, so the high-energy liquid fuel provided by the present invention does not require the addition of a secondary initiator.

[0040] The high-energy liquid fuel provided by the present invention comprises a main fuel with a percentage of 40-75wt%, which can be specifically 40, 45, 50, 55, 60, 65, 70, 73 or 75wt% in the embodiments of the present invention. In the present invention, the main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds, preferably including one or more of normal alkanes with a carbon number not exceeding 12, isoalkanes with a carbon number not exceeding 12, non-terminal olefins with a carbon number not exceeding 12, saturated hydrocarbons with a carbon number not exceeding 14 and containing a benzene ring, dispirocyclic hydrocarbons with a carbon number not exceeding 18, trispirocyclic hydrocarbons with a carbon number not exceeding 18, di-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tri-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tetra-bridged cyclic hydrocarbons with a carbon number not exceeding 18 and bridged and parallel cyclic hydrocarbons with a carbon number not exceeding 18.

[0041] In the present invention, the normal or isomeric alkane having a carbon number not exceeding 12 preferably includes one of n-hexane, n-heptane, n-octane, n-nonane, n-decane, n-undecane, n-dodecane, 2,2-dimethylbutane, 2-ethylbutyl and 2-ethylhexyl, or a mixture of any kind and proportion.

[0042] In the present invention, the non-terminal olefin having a carbon number not exceeding 12 preferably includes one of 2-hexene, 2-heptene, 2-octene, 3-octene, 4-octene, 2,4,4-trimethyl-1-pentene, 2,4,4-trimethyl-2-pentene, 2-methyl-2-heptene, 2,2-dimethyl-3-hexene, 2,3-dimethyl-2-hexene, 5-methyl-1-heptene, 3-methyl-1-heptene, 3,5-dimethyl-3-hexene, 2,4-dimethyl-1-heptene, 2-nonene, 3-nonene, 4-nonene, 3,5,5-trimethyl-1-hexene, 3,5,5-trimethyl-2-hexene, 2,6-dimethyl-1-heptene, 2,3-dimethyl-2-heptene and 2,6-dimethyl-3-heptene, or a mixture of any kind and proportion.

[0043] In the present invention, the saturated hydrocarbon having a carbon number not exceeding 14 and containing a benzene ring preferably includes one of mixed xylenes, mesitylene, mixed methyl and ethyl benzenes, ethylbenzene, isopropylbenzene, isobutylbenzene, p-methyl isopropylbenzene, tert-butylbenzene, p-methyl tert-butylbenzene, mixed dibutylbenzenes, 1-hexylbenzene and 1-octylbenzene, or a mixture of any type and proportion.

[0044] In the present invention, the dispirocycloalkane having no more than 18 carbon atoms preferably includes one of spiro[4,5]decane, spiro[2,7]decane, spiro[3,5]nonane, spiro[4,4]nonane and spiro[4,4]1-nonene, or a mixture of any kind and proportion.

[0045] In the present invention, the trispirocycloalkane having no more than 18 carbon atoms preferably includes one of trispiro[3,0,3,1]nonane, dispiro[2,0,2,3]nonane and dispiro[5,0,5,2]tetradecane or a mixture of any kind and ratio.

[0046] In the present invention, the dicycloalkane having no more than 18 carbon atoms preferably includes pinane, pinene, dantenene, 5-ethyl-2-norbornene, 5,5-dimethylnorbornene, bicyclo[3,3,2]decane, bicyclo[4,2,2]decane, bicyclo[4,3,1]decane, bicyclo[3,3,1]nonane, bicyclo[6,1,0]nonane, bicyclo[3,3,2]nonane, bicyclo[4,3,1 ]nonane, 6,6-dimethyl-bicyclo[3,3,1]-2-octene, 3-methylbicyclo[3,2,1]-2-octene, 1,2-dimethylbicyclo[2,2,1]-2-heptene, 5-methylenespiro[3,4]octane, 1-methyl-4-pentylbicyclo[2,2,2]octane and 2-ethyl-3-butylbicyclo[2,2,2]octane, or a mixture of any kind and ratio.

[0047] In the present invention, the three-bridged cyclic hydrocarbon having no more than 18 carbon atoms preferably includes tetrahydrodicyclopentadiene (JP-10), tricyclo[3.3.1.0 3,7 ]Nonane, tricyclic [4.2.1.0 3,9 ]Nonane, tricyclic[4.3.0.0 3,7 ]Nonane, tricyclic [3.3.1.0 1,5 ]Nonane, tricyclic [4.3.0.0 3,8 ]Nonane, tricyclic [4.3.1.0 2,5 ]Nonane, tricyclic [3.2.2.0 2,5 ]nonane, 1-ethyl-tricyclo[2.2.1.0 2,6 ]heptane, 3-ethyl-tricyclo[2.2.1.0 2,6 ]heptane, 1,7-dimethyl-tricyclo[2.2.1.0 2,6 ]heptane, tricyclic [6.1.0.0 2,4 ]Nonane, tricyclic [4.2.1.0 2,4 ]nonane, 9-methyltricyclo[4.3.0.0 2,9 ]octane, tricyclo[4,4,4]tetradecane, 2-tert-butyltricyclo[3.3.1.1 3,7 ]tetradecane and bicyclo[4,2,4,2]tetradecane or a mixture of any types and ratios.

[0048] In the present invention, the four-bridged cycloalkane having no more than 18 carbon atoms preferably includes tert-butyl adamantane, n-butyl adamantane, 1,3,5,7-tetramethyl adamantane, 7,7'-bicyclo[2.2.1]heptane, 2,2-methylspiro[cyclopropyl-1,2'-tricyclo[3.3.1.1 3,7 ]decane], tetracyclo[5.4.1.1 1,5 .1 3,9 ]Tetradecane and tetracyclo[5.4.1.1 1,5 .1 3,10 ]One of tetradecane or a mixture of any types and proportions.

[0049] In the present invention, the bridged cyclic hydrocarbon having no more than 18 carbon atoms preferably includes spiro[bicyclo[4,1,0]heptyl]-7,1'-cyclooctane, 4,11,11-trimethyltricyclo[6.2.1.0 2,7 ] undecane, tetracyclo[8.3.0.1 2,9 .0 3,8 ]Tetradecane, 1,4:5,8-dimethylendecalin, 7-butyl-tricyclo[4.2.2.0 2,5]-7-decene, 1,2,3,4,5,6,7,8,9,10-decahydro-1,4-ethylbenzocyclooctane, 3,4,9,10-tetramethyl-tricyclo-[4.2.2.0 2,5 ]-7-decene and dispiro[cyclopropyl-1,3'-tricyclo[5.2.1.0 2,6 ]4,8-decadiene-10',1"-cyclopropane] or a mixture of any kind and ratio.

[0050] In the present invention, the main fuel preferably includes a mixture of JP-10 and 2,3-dimethylbutane, a mixture of pinane and n-heptane, or a mixture of 1,3,5,7-tetramethyladamantane and 2-octene. In the present invention, JP-10 and 2,3-dimethylbutane have good temperature stability and are transparent liquids with good fluidity in the range of -30-40°C. The mass percentage of JP-10 in the mixture of JP-10 and 2,3-dimethylbutane is preferably 35-80%, and in the embodiments of the present invention, it can be specifically 35, 37, 40, 45, 50, 55, 60, 65, 70, 75, 77 or 80%. The mass percentage of pinane in the mixture of pinane and n-heptane is preferably 20%; the mass percentage of 1,3,5,7-tetramethyladamantane in the mixture of 1,3,5,7-tetramethyladamantane and 2-octene is preferably 20%.

[0051] In the present invention, 2-octene is a large-scale organic main fuel, and its function is the same as JP-10. The combustion heat of 1,3,5,7-tetramethyladamantane is similar to that of 2-octene, but its physical density is higher than that of the former, that is, its effective energy density is higher than that of the former, which can improve the energy density of the entire charge. Moreover, the two have good mutual solubility, which can ensure the uniformity of the charge. When the proportion of 2-octene is high, the atomization will be better to form small droplets when the charge is scattered; when the content of 1,3,5,7-tetramethyladamantane is high, the scattering of the charge may form a large number of small solid particles, and the combustion heat will be higher.

[0052] The high-energy liquid fuel provided by the present invention comprises an oxygen-containing fuel with a percentage of 10-35wt%, which can be specifically 10, 11, 12, 13, 14, 15, 20, 25, 30 or 35wt% in the embodiments of the present invention. In the present invention, the oxygen-containing fuel is a polymethoxy dialkyl ether; the methoxy polymerization degree of the polymethoxy dialkyl ether is preferably 1-20, which can be specifically 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20; the alkyl group in the polymethoxy dialkyl ether is preferably one or two of a saturated normal alkane with 1-16 carbon atoms, an isomeric alkane with 3-16 carbon atoms, and an aromatic substituted alkyl, preferably 2-ethylhexyl, n-butyl or 2-methylpropyl. In the present invention, the oxygen-containing fuel can be a single compound of the above-mentioned polymethoxy dialkyl ether, or a mixture of multiple polymethoxy dialkyl ethers. When the mixture is used as a raw material component, no purification step is required, the cost is low, and it has better economy. In an embodiment of the present invention, the oxygen-containing fuel can be specifically monopolymethoxy di(2-methylpropyl) ether.

[0053] The present invention provides a method for preparing the high-energy liquid fuel described in the above technical solution, comprising the following steps:

[0054] mixing the main fuel and the oxygenated fuel in a dry environment to obtain a premixed liquid;

[0055] In a protective atmosphere, the premixed liquid is mixed with alkyl aluminum to obtain the self-igniting high-energy liquid fuel with great power.

[0056] The present invention mixes the main fuel and the oxygen-containing fuel in a dry environment to obtain a premixed liquid. The present invention has no special restrictions on the dry environment, and the moisture in the environment can be removed by drying or the like.

[0057] After obtaining the premixed liquid, the present invention mixes the premixed liquid with alkyl aluminum in a protective atmosphere to obtain the self-initiating high-energy liquid fuel. In the present invention, the protective atmosphere is preferably nitrogen to isolate oxygen.

[0058] After obtaining the high-energy liquid fuel, the present invention packages the high-energy liquid fuel. In the embodiment of the present invention, in order to better observe the stability of the fuel, the high-energy liquid fuel is packaged in a quartz bottle in the embodiment, and the preparation method can be specifically as follows: adding the main fuel and the oxygen-containing fuel into a dried quartz bottle, adding alkyl aluminum under nitrogen protection, obtaining the high-energy liquid fuel, and sealing the quartz bottle.

[0059] The embodiments of the present invention are described in detail below.

[0060] It should be noted that the following embodiments and features in the embodiments may be combined with each other in the absence of conflict; and, based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work are within the scope of protection of the present disclosure.

[0061] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0062] The preparation method of the high-energy liquid fuel in the embodiment is: adding the main fuel and the oxygen-containing fuel into a dried quartz bottle, adding alkyl aluminum under nitrogen protection, and sealing the quartz bottle.

[0063] Example 1

[0064] 19.24 g (19.24 wt%) JP-10, 32.73 g (32.73 wt%) 2,3-dimethylbutane, and 11 g (11 wt%) monopolymethoxybis(2-ethylhexyl) ether were added to a 500 mL dried aluminum bottle, and 37 g (37 wt%) triethylaluminum was added under nitrogen protection. The quartz bottle was sealed to obtain a high-energy liquid fuel.

[0065] Example 2

[0066] 35.75 g (35.75 wt%) JP-10, 29.25 g (29.2 wt%) 2,3-dimethylbutane, and 13 g (13 wt%) monopolymethoxybis(2-ethylhexyl) ether were added to a 500 mL dried aluminum bottle, and 22 g (22 wt%) triethylaluminum was added under nitrogen protection. The aluminum bottle was sealed to obtain a high-energy liquid fuel.

[0067] Example 3

[0068] 56.21 g (56.21 wt%) of JP-10, 16.79 g (16.79 wt%) of 2,3-dimethylbutane, and 14 g (14 wt%) of monopolymethoxybis(2-ethylhexyl) ether were added to a 500 mL dried aluminum bottle, and 13 g (13 wt%) of triethylaluminum was added under nitrogen protection. The aluminum bottle was sealed to obtain a high-energy liquid fuel.

[0069] Test Case

[0070] 1. Stability test 1

[0071] 35.8 g (35.8 wt%) JP-10, 29.2 g (29.2 wt%) 2,3-dimethylbutane, and 13 g (13 wt%) monopolymethoxybis(2-ethylhexyl) ether were added to a 500 mL dried quartz bottle, and 22 g (22 wt%) triethylaluminum was added under nitrogen protection, and the quartz bottle was sealed.

[0072] Prepare three bottles of mixed solution in parallel according to the above scheme, place the three bottles of mixed solution in a 50°C thermostat for 48 hours, and observe whether they are turbid, sedimented, sticky or stratified.

[0073] Three bottles of mixed solution were prepared in parallel according to the above scheme, and the three bottles of mixed solution were placed in a -40°C thermostat for 48 hours to observe whether they were turbid, precipitated, sticky or stratified.

[0074] Prepare three bottles of mixed solution in parallel according to the above scheme, place the three bottles of mixed solution at a constant temperature of 70°C, shake on a shaker for 2 hours, and observe whether they are turbid, sedimented, sticky or stratified.

[0075] Prepare three bottles of mixed solution in parallel according to the above scheme, place the three bottles of mixed solution at a constant temperature of -55°C, shake on a shaker for 2 hours, and observe whether they are turbid, sedimented, sticky or stratified.

[0076] 2. Stability test 2

[0077] 35.8 g (35.8 wt%) JP-10, 29.2 g (29.2 wt%) 2,3-dimethylbutane, and 13 g (13 wt%) monopolymethoxy di-n-butyl ether were added to a 500 mL dried aluminum bottle, 22 g (22 wt%) triethylaluminum was added under nitrogen protection, and the bottle mouth was sealed with a light-transmitting quartz stopper.

[0078] Three bottles of mixed solutions were prepared in parallel according to the above scheme, and the three bottles of mixed solutions were placed in a 50° C. thermostat for 48 hours to observe whether they were turbid, precipitated, sticky or stratified.

[0079] Three bottles of mixed solution were prepared in parallel according to the above scheme, and the three bottles of mixed solution were placed in a -40°C thermostat for 48 hours to observe whether they were turbid, precipitated, sticky or stratified.

[0080] Prepare three bottles of mixed solution in parallel according to the above scheme, place the three bottles of mixed solution at a constant temperature of 70°C, shake on a shaker for 2 hours, and observe whether they are turbid, sedimented, sticky or stratified.

[0081] Prepare three bottles of mixed solution in parallel according to the above scheme, place the three bottles of mixed solution at a constant temperature of -55°C, shake on a shaker for 2 hours, and observe whether they are turbid, sedimented, sticky or stratified.

[0082] For the convenience of observation, the fuel sample in stability experiment 2 was moved to a sample bottle in the glove box and photographed. The results of stability experiments 1 and 2 are shown in the figure below. Figure 1-8 As shown, the results confirmed that the mixed fuel showed no turbidity, sedimentation, stickiness or stratification at low temperature, high temperature and vibration, showing good stability.

[0083] 3. Combustion property test

[0084] The high-energy liquid fuels obtained in Examples 1-3 were tested, and the results are shown in Table 1.

[0085] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

[0086] Table 1. Formula and performance comparison of high energy liquid fuel obtained in Example 1 of the present invention

[0087]

[0088] It can be seen from Table 1 that the use of alkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0089] Embodiment 4-6

[0090] Using the composition shown in Table 2 as raw materials, a high-energy liquid fuel was obtained according to the preparation scheme of Example 1. The performance test results are shown in Table 2.

[0091] Table 2. Formula and performance comparison of high energy liquid fuels of Examples 4-6 of the present invention

[0092]

[0093] It can be seen from Table 2 that the use of alkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0094] Embodiment 7-9

[0095] Using the composition shown in Table 3 as raw materials, high-energy liquid fuel was obtained according to the preparation scheme of Example 1. The performance test results are shown in Table 3.

[0096] Table 3. Formula and performance comparison of high energy liquid fuels of Examples 7-9 of the present invention

[0097]

[0098] It can be seen from Table 3 that the use of alkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0099] Examples 10-12

[0100] Using the composition shown in Table 4 as raw materials, high-energy liquid fuel was obtained according to the preparation scheme of Example 1. The performance test results are shown in Table 4.

[0101] Table 4. Formula and performance comparison of high energy liquid fuels of Examples 10-12 of the present invention

[0102]

[0103] It can be seen from Table 4 that the use of alkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0104] Examples 13-15

[0105] Using the composition shown in Table 5 as raw materials, high-energy liquid fuel was obtained according to the preparation scheme of Example 1, and the performance test results are shown in Table 5.

[0106] Table 5. Formula and performance comparison of high energy liquid fuels of Examples 13-15 of the present invention

[0107]

[0108] It can be seen from Table 5 that the use of alkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0109] Examples 16-18

[0110] Using the composition shown in Table 6 as raw materials, high-energy liquid fuel was obtained according to the preparation scheme of Example 1, and the performance test results are shown in Table 6.

[0111] Table 6. Formula and performance comparison of high energy liquid fuels of Examples 16-18 of the present invention

[0112]

[0113] It can be seen from Table 6 that the use of dialkyl aluminum instead of metallic aluminum achieves a better balance between stability and combustion performance.

[0114] From the data in Table 1-6, it can be seen that the combination of JP-10 and 2,3-dimethylbutane as the main fuel, monopolymethoxydi(2-ethylhexyl)ether as the oxygen-containing fuel, and triethylaluminum as the initiator and high-temperature auxiliary agent is the combination with the highest combustion heat. Its comprehensive performance is higher than other combinations.

[0115] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A self-igniting high-energy liquid fuel, characterized in that: Contains no secondary initiator and contains the following components in percentage: 10-50 wt% aluminum alkyl; 40-75wt% main fuel; 10-35wt% oxygenated fuel; The main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds; The oxygen-containing fuel is polymethoxy dialkyl ether.

2. The high-energy liquid fuel according to claim 1, characterized in that: The alkylaluminum includes one or more of trimethylaluminum, triethylaluminum, tripropylaluminum, diisopropylaluminum hydride, diisobutylaluminum hydride and tris(dimethylamino)aluminum dimer.

3. The high energy liquid fuel according to claim 2, characterized in that: The alkyl aluminum is triethyl aluminum.

4. The high-energy liquid fuel according to claim 1, characterized in that: The main fuel includes one or more of normal alkanes with a carbon number not exceeding 12, isoalkanes with a carbon number not exceeding 12, non-terminal olefins with a carbon number not exceeding 12, saturated hydrocarbons with a carbon number not exceeding 14 and containing a benzene ring, dispirocyclic hydrocarbons with a carbon number not exceeding 18, trispirocyclic hydrocarbons with a carbon number not exceeding 18, di-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tri-bridged cyclic hydrocarbons with a carbon number not exceeding 18, tetra-bridged cyclic hydrocarbons with a carbon number not exceeding 18, and bridged and parallel cyclic hydrocarbons with a carbon number not exceeding 18.

5. The high-energy liquid fuel according to claim 4, characterized in that: The main fuel includes a mixture of tetrahydrodicyclopentadiene and 2,3-dimethylbutane.

6. The high-energy liquid fuel according to claim 1, characterized in that: The polymethoxy dialkyl ether has a methoxy polymerization degree of 1-20.

7. The high-energy liquid fuel according to claim 6, characterized in that: The alkyl group in the polymethoxydialkyl ether is one or two of a saturated normal alkane having 1 to 16 carbon atoms, an isoalkane having 3 to 16 carbon atoms, and an aromatic substituted alkyl group.

8. The method for preparing the high-energy liquid fuel according to any one of claims 1 to 7, characterized in that: The following steps are involved: mixing the main fuel and the oxygenated fuel in a dry environment to obtain a premixed liquid; In a protective atmosphere, the premixed liquid is mixed with alkyl aluminum to obtain the self-igniting high-energy liquid fuel with great power.

9. The preparation method according to claim 8, characterized in that: The protective atmosphere is nitrogen.

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