Smoke-reducing fuel composition and application thereof

Abstract

The invention relates to the field of fuel, and discloses a smoke reduction fuel composition and application thereof. The invention relates to a smoke reduction fuel composition, the smoke reduction fuel composition comprises a base fuel and a composite smoke reduction component, the composite smoke reduction component comprises polyoxymethylene dialkyl ether, ester organic peroxide and / or oxalic acid dialkyl ester, and a diacid monoester compound; wherein on the basis of the total mass of the composite smoke reduction component, the content of the polyoxymethylene dialkyl ether is 10-99.9% by mass, the content of the ester organic peroxide is 0-90% by mass, the content of the dialkyl oxalate is 0-70% by mass, the content of the dibasic acid monoester compound is 0.01-30% by mass, and the content of the dibasic acid monoester compound is 0.01-30% by mass. The content of the ester organic peroxide and the content of the oxalic acid dialkyl ester are not zero at the same time. The composition has good lubricity and smoke reduction performance, the soot emission of an engine can be reduced under the plateau environment condition, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of fuels, and in particular to a smoke reduction fuel composition and application thereof. Background Art

[0002] my country has vast plateaus, of which areas with an altitude of more than 1,000 meters account for more than 58% of the country's land area, and areas with an altitude of more than 2,000 meters account for more than 33% of the country's land area. Plateau areas have the characteristics of complex terrain, low atmospheric pressure, low air density, and low oxygen content in the air.

[0003] Diesel engines have advantages in power output and reliability, and are an important power source for material transportation, industrial production, engineering construction, and military equipment. However, when diesel engines are running in plateau areas, the amount of air entering the diesel engine cylinder is reduced due to the decrease in atmospheric pressure and temperature, and the pressure and temperature of the mixture at the end of compression are reduced, so that the fuel injected into the cylinder cannot ignite in time, causing combustion lag, causing combustion deterioration, and thus causing emission deterioration, which greatly limits the use of diesel engines in plateaus.

[0004] Patent application CN106244262A discloses an oxygenated diesel suitable for use in plateau areas, which is a mixture of oxygenated multi-effect agent, regenerated diesel, diesel component oil and aviation kerosene, wherein the oxygenated multi-effect agent is composed of polymethoxy dimethyl ether, ferrocene, xylene, isooctyl nitrate, oleic acid, detergent, and fatty acid methyl ester. The patent discloses that the plateau oxygenated clean diesel has cleanliness and can reduce tail gas emissions. However, the plateau oxygenated multi-effect agent accounts for more than 50% (weight) in the oxygenated diesel, which greatly increases the use cost of oxygenated diesel, and ferrocene is an orange-yellow needle-shaped or powdered organic metal crystal. Adding it to diesel in a large proportion will make the diesel color darker, and users will question the quality of the fuel, which is not conducive to sales.

[0005] Patent application CN107446633A discloses a polymethoxy dialkyl ether type oxygenated diesel fuel for use in plateau areas, which is composed of 30-100% polymethoxy dialkyl ether and 0-70% diesel fuel. The patent discloses that polymethoxy dialkyl ether type oxygenated diesel fuel can reduce tail gas black smoke emissions. However, oxygenated diesel fuel has a low calorific value, which leads to increased fuel consumption; on the other hand, the raw material sources of polymethoxy dialkyl ether with special structure are limited and the production cost is high.

[0006] Patent application CN110527565A discloses an oxygenated diesel for high altitude vehicles, which is made of 65-70% diesel, 13-15% FT diesel, 13.8-16.5% methanol and 3.2-8.2% fatty acid methyl esters. The patent discloses that the diesel can reduce diesel engine emissions, improve diesel engine combustion and reduce tail gas emissions. However, the oxygenated diesel has the disadvantages of poor miscibility and low cetane number. Summary of the invention

[0007] The purpose of the present invention is to overcome the problems of incomplete fuel combustion and excessive exhaust carbon soot in a low-pressure environment in the prior art, and to provide a smoke-reducing fuel composition and its application. The composition has good lubricity and smoke-reducing performance, and can reduce the carbon soot emissions of the engine under plateau environmental conditions, thereby achieving energy conservation and emission reduction.

[0008] In order to achieve the above-mentioned object, the first aspect of the present invention provides a smoke reduction fuel composition, wherein the composition comprises a base fuel and a composite smoke reduction component, wherein the composite smoke reduction component comprises a polymethoxy dialkyl ether, an ester organic peroxide and / or a dialkyl oxalate, and a dibasic acid monoester compound;

[0009] Among them, based on the total mass of the composite smoke reduction component, the content of the polymethoxy dialkyl ether is 10-99.9% by weight, the content of the ester organic peroxide is 0-90% by weight, the content of the dialkyl oxalate is 0-70% by weight, the content of the dibasic acid monoester compound is 0.01-30% by weight, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time.

[0010] The second aspect of the present invention provides an application of the clean fuel composition described in the first aspect in a fuel engine in plateau areas.

[0011] The smoke-reducing fuel composition provided by the present invention is prepared by mixing a composite smoke-reducing component with a fuel product, taking full account of the combustion characteristics of the fuel in the engine, and fundamentally changing the deficiency of a large amount of carbon smoke generated due to insufficient combustion of the fuel under low-pressure environmental conditions. The compounding of various components in the composite smoke-reducing component can supplement the oxygen environment required for combustion during the combustion process, and can effectively reduce the problem of carbon smoke emissions in motor vehicle exhaust caused by insufficient combustion. Preferably, under the plateau environmental conditions provided by the invention, the carbon smoke emission content of the engine is reduced by at least 5%, achieving energy conservation and emission reduction, and from an environmental protection perspective, it is more efficient and cleaner. DETAILED DESCRIPTION

[0012] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0013] The first aspect of the present invention provides a smoke reduction fuel composition, wherein the composition comprises a base fuel and a composite smoke reduction component, wherein the composite smoke reduction component comprises a polymethoxy dialkyl ether, an ester organic peroxide and / or a dialkyl oxalate, and a dibasic acid monoester compound;

[0014] Among them, based on the total mass of the composite smoke reduction component, the content of the polymethoxy dialkyl ether is 10-99.9% by mass, the content of the ester organic peroxide is 0-90% by mass, the content of the dialkyl oxalate is 0-70% by mass, the content of the dibasic acid monoester compound is 0.01-30% by mass, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time.

[0015] The smoke-reducing fuel composition provided by the present invention is prepared by mixing a composite smoke-reducing component with a fuel product, taking full account of the combustion characteristics of the fuel in the engine, and fundamentally changing the deficiency of a large amount of carbon smoke generated due to insufficient combustion of the fuel under low-pressure environmental conditions. The compounding of various components in the composite smoke-reducing component can supplement the oxygen environment required for combustion during the combustion process, and can effectively reduce the problem of carbon smoke emissions in motor vehicle exhaust caused by insufficient combustion. Preferably, under the plateau environmental conditions provided by the invention, the carbon smoke emission content of the engine is reduced by at least 5%, achieving energy conservation and emission reduction, and from an environmental protection perspective, it is more efficient and cleaner.

[0016] The fuel provided by the present invention has the advantages of good plateau adaptability and clean emissions, and can effectively solve the problem of substandard diesel exhaust emissions caused by high-altitude oxygen-deficient environments. The smoke-reducing fuel composition of the present invention has a simple formula, and in a preferred case, it can be added to the product through a fuel blending process without investing huge manpower, material and financial resources. Therefore, it is an economical, efficient and practical way to reduce the carbon smoke content of diesel engine exhaust emissions.

[0017] The smoke-reducing fuel composition formula provided by the present invention starts from the modification process of the fuel, fully considers the combustion characteristics of the fuel in the engine, mixes and formulates the additive components with the carbon smoke reduction function with the base fuel, and fundamentally changes the deficiency of the fuel in the low-pressure environment condition that the combustion process is not sufficient and leads to the generation of a large amount of carbon smoke. The compounding of various components can play a role in supplementing the oxygen environment required for combustion during the combustion process, and can effectively reduce the problem of carbon smoke emission in the exhaust gas of motor vehicles caused by incomplete combustion.

[0018] In the present invention, preferably, based on the total mass of the composite smoke reducing component, the content of the polymethoxy dialkyl ether is 30-99.9% by mass, the content of the ester organic peroxide is 0-69% by mass, the content of the dialkyl oxalate is 0-50% by mass, the content of the dibasic acid monoester compound is 0.03-20% by mass, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time; further preferably, based on the total mass of the composite smoke reducing component, the content of the polymethoxy dialkyl ether is 50-95% by mass, for example, it can be 50% by mass, 55% by mass, 60% by mass, 65% by mass, 70% by mass, 75% by mass, 80% by mass, 85% by mass, 90% by mass, 95% by mass and values ​​between any two points, the ester has The content of the organic peroxide is 0-30% by mass, for example, it can be 0% by mass, 1% by mass, 5% by mass, 10% by mass, 15% by mass, 20% by mass, 25% by mass, 30% by mass and a value between any two points; the content of the dialkyl oxalate is 0-20% by mass, for example, it can be 0% by mass, 1% by mass, 5% by mass, 10% by mass, 15% by mass, 20% by mass and a value between any two points; the content of the dibasic acid monoester compound is 0.05-10% by mass, for example, it can be 0.05% by mass, 1% by mass, 2% by mass, 3% by mass, 4% by mass, 5% by mass, 6% by mass, 7% by mass, 8% by mass, 9% by mass, 10% by mass and a value between any two points; the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time.

[0019] In the present invention, the content of each component in the composition is calculated by the feed amount.

[0020] In the present invention, preferably, the polymethoxy dialkyl ether has a structure shown in formula (I),

[0021] [CH3(CH2) x O] m1 (CH2O) m2 (CH2) y CH3 formula (I)

[0022] In formula (I), x and y are each independently 0-30, preferably 1-15, more preferably 1-10, and even more preferably 1-5;

[0023] m1 and m2 are each independently 1-20, preferably 1-10, and more preferably 1-8.

[0024] In the present invention, preferably, m1 is 1-5, and m2 is 3-8.

[0025] In the present invention, there is no particular limitation on the specific types of polymethoxy dialkyl ethers, and any compound having the aforementioned structure is applicable to the present invention. Preferably, the polymethoxy dialkyl ether is selected from at least one of polymethoxy dimethyl ether, polymethoxy diethyl ether, polymethoxy dipropyl ether, polymethoxy dibutyl ether, polymethoxy dipentyl ether, polymethoxy dihexyl ether, polymethoxy diheptyl ether, polymethoxy dioctyl ether, polymethoxy dinonyl ether and polymethoxy didecyl ether, and is further preferably selected from at least one of polymethoxy dimethyl ether, polymethoxy diethyl ether, polymethoxy dipropyl ether and polymethoxy dibutyl ether.

[0026] In the present invention, preferably, the ester organic peroxide has a structure shown in formula (II),

[0027]

[0028] In formula (II), R1 is a C1-C10 alkyl group, and R2 is a C1-C20 hydrocarbon group. Preferably, R1 is a C2-C8 alkyl group, and R2 is a C4-C15 hydrocarbon group. More preferably, R1 is a C4-C6 alkyl group, and R2 is a C4-C12 hydrocarbon group.

[0029] In the present invention, R1 can be a normal alkyl group, an isomeric alkyl group, and R2 can be a normal alkyl group, an isomeric alkyl group, a cycloalkyl group, or an aryl group. The present invention does not particularly limit the specific types of ester organic peroxides, and any ester organic peroxide having the aforementioned structure is applicable to the present invention. Preferably, the ester organic peroxide is selected from at least one of peroxy-2-ethylhexanoic acid tert-butyl ester, peroxy-octanoic acid tert-butyl ester, peroxy-2-ethylhexanoic acid tert-amyl ester, peroxy-3,5,5-trimethylhexanoic acid tert-butyl ester, peroxy-pivalate, peroxy-tert-butyl neodecanoate, peroxy-pivalate, peroxy-tert-butyl benzoate, and peroxy-tert-butyl laurate.

[0030] In the present invention, preferably, the dialkyl oxalate has a structure shown in formula (III),

[0031] CH3R s OOCCOOR t CH3 Formula (III)

[0032] In formula (III), Rs and Rt are each independently a C0-C10 hydrocarbon group, preferably a C0-C8 hydrocarbon group. In the present invention, Rs and Rt may be a normal hydrocarbon group or an isomeric hydrocarbon group, and Rs and Rt may be the same or different.

[0033] The present invention does not particularly limit the specific type of dialkyl oxalate, and any dialkyl oxalate having the aforementioned structure is applicable to the present invention. Preferably, the dialkyl oxalate is selected from at least one of dimethyl oxalate, diethyl oxalate, ethyl methyl oxalate, methyl butyl oxalate, methyl isopropyl oxalate, ethyl butyl oxalate, dibutyl oxalate and dioctyl oxalate, and more preferably at least one of dimethyl oxalate, diethyl oxalate, dibutyl oxalate and methyl butyl oxalate.

[0034] In the present invention, preferably, the dibasic acid monoester compound has a structural formula shown in formula (IV),

[0035]

[0036] In formula (IV), R3 is selected from C n H 2n-2 The hydrocarbon group, C n H 2n At least one of a hydrocarbon group and a cyclic hydrocarbon group, n is 0-18, preferably 2-4, R4 is a C1-C30 hydrocarbon group, preferably a C1-C18 hydrocarbon group;

[0037] Preferably, the cyclic hydrocarbon group has a structure shown in formula (V),

[0038]

[0039] In formula (V), p is 1-8, q is 0-3, x is 0-8, y1 is 0-2, and y2 is 0-2.

[0040] In the present invention, the dibasic acid monoester compound may be an unsaturated dibasic acid monoester compound. According to a preferred embodiment of the present invention, when R3 is C n H 2n-2 When the unsaturated dibasic acid monoester compound has a structure shown in formula (IV-1),

[0041]

[0042] In formula (IV-1), n ​​is 2 to 4, and R4 is a C1 to C18 hydrocarbon group.

[0043] According to a specific embodiment of the present invention, when n is 2, the dibasic acid monoester compound is maleic acid monoester (maleic acid monoester) and / or fumaric acid monoester (fumaric acid monoester), and is further preferably at least one of monomethyl maleate, monoethyl maleate, monon-propyl maleate, monobutyl maleate, monooctyl maleate, monoisopropyl maleate, monoisobutyl maleate, monosec-butyl maleate, monoisooctyl maleate, monoisononyl maleate, monoisodecyl maleate, monoallyl maleate, mono-3-butene-1-ol maleate and monoisopentenol maleate.

[0044] According to a specific embodiment of the present invention, when n is 3, the dibasic acid monoester compound is selected from at least one of itaconic acid monoester, citraconic acid monoester (methylmaleic acid monoester), methyl fumaric acid monoester (methyl fumaric acid monoester) and glutaconate monoester, and is further preferably selected from at least one of monomethyl itaconate, monoethyl itaconate, mono-n-propyl itaconate, mono-n-butyl itaconate, mono-n-octyl itaconate, mono-n-decyl itaconate, mono-n-dodecyl itaconate (lauryl itaconate), monoisopropyl itaconate, monoisobutyl itaconate, mono-isooctyl itaconate (mono-2-ethylhexyl itaconate), monoisononyl itaconate, monoisodecyl itaconate, monoallyl itaconate, mono-3-butene-1-ol itaconate and monoisopentenyl itaconate.

[0045] According to a specific embodiment of the present invention, when n is 4, the dibasic acid monoester compound is at least one selected from 2,3-dimethyl maleic acid monoester, ethyl maleic acid monoester and hexenedioic acid monoester, and is further preferably at least one of monocyclobutyl maleate, monocyclopentyl maleate, monocyclohexyl maleate, mono-3-cyclohexene-1-methyl maleate, monocyclohexyl itaconate, mono-2-cyclohexenyl itaconate, mono-p-nonylphenyl maleate, monobenzyl maleate, monophenylethyl maleate, monophenylpropanol maleate, monobenzyl itaconate, monophenylethyl itaconate and monophenylpropanol itaconate.

[0046] In the present invention, the dibasic acid monoester compound may be a saturated dibasic acid monoester compound with or without a substituent. According to a preferred embodiment of the present invention, when R1 is C n H 2n When the saturated dibasic acid monoester compound has a structure of formula (IV-2),

[0047]

[0048] In formula (IV-2), n is 0-18, preferably 2-8, and R4 is a C1-C18 hydrocarbon group.

[0049] In the present invention, the unsubstituted saturated dibasic acid monoester compound refers to a structure in which there is no branched substituent on the CH2 group between the two carbonyl groups in formula (IV-2).

[0050] According to a specific embodiment of the present invention, the saturated dicarboxylic acid monoester compound is selected from at least one of oxalic acid monoester, malonic acid monoester, succinic acid monoester, glutaric acid monoester, adipic acid monoester, pimelic acid monoester, suberic acid monoester, azelaic acid monoester, sebacic acid monoester, undecanedioic acid monoester, dodecanedioic acid monoester, tridecanedioic acid monoester, tetradecanedioic acid monoester, hexadecanedioic acid monoester and octadecanoic acid monoester.

[0051] According to a preferred embodiment of the present invention, the unsubstituted saturated dicarboxylic acid monoester compound is selected from oxalic acid monoester, malonic acid monoester, succinic acid monoester, glutaric acid monoester, adipic acid monoester, azelaic acid monoester and sebacic acid monoester.

[0052] In the present invention, the specific type of oxalic acid monoester is not particularly limited. Preferably, the oxalic acid monoester is selected from at least one of monomethyl oxalate, monoethyl oxalate, monopropyl oxalate, mono-n-butyl oxalate, mono-isobutyl oxalate, mono-tert-butyl oxalate, mono-n-pentyl oxalate, mono-isopentyl oxalate, monohexyl oxalate, monooctyl oxalate, mono-isooctyl oxalate, monocyclohexyl oxalate, mono-3-cyclohexene-1-methyl oxalate, mono-p-nonylphenyl oxalate and monobenzyl oxalate.

[0053] In the present invention, the specific type of malonic acid monoester is not particularly limited. Preferably, the malonic acid monoester is selected from at least one of monomethyl malonate, monoethyl malonate, monopropyl malonate, mono-n-butyl malonate, mono-isooctyl malonate, mono-sec-octyl malonate, mono-isononyl malonate, monocyclohexyl malonate, mono-3-cyclohexene-1-methyl malonate, mono-p-nonylphenyl malonate and monobenzyl malonate.

[0054] In the present invention, the specific type of succinic acid monoester is not particularly limited. Preferably, the succinic acid monoester is selected from at least one of mono-n-butyl succinate, mono-sec-butyl succinate, mono-n-hexyl succinate, mono-n-octyl succinate, mono-isobutyl succinate, mono-tert-butyl succinate, mono-isoamyl succinate, mono-isohexyl succinate, mono-isooctyl succinate, mono-cyclohexyl succinate, mono-3-cyclohexene-1-methyl succinate, mono-p-nonylphenyl succinate and mono-benzyl succinate.

[0055] In the present invention, the dibasic acid monoester compound may be a dibasic acid monoester compound containing a cyclic hydrocarbon group. According to a specific preferred embodiment of the present invention, the dibasic acid monoester compound containing a cyclic hydrocarbon group has a structure shown in formula (IV-3),

[0056]

[0057] In formula (IV-3), p is 1-8, preferably 1-6, and more preferably 4 or 5, q is 0-3, preferably 0-1, and more preferably 0, x is 0-8, preferably 0-6, y1 and y2 are each independently 0-2, preferably 0-1, and R4 is a C1-C30 hydrocarbon group, preferably a C1-C18 hydrocarbon group, and more preferably a C4-C12 hydrocarbon group.

[0058] According to a specific embodiment of the present invention, the dibasic acid monoester compound containing a cyclic hydrocarbon group is selected from 4-cyclohexene-1,2-dicarboxylic acid monoester (tetrahydrophthalic acid monoester), phthalic acid monoester, terephthalic acid monoester, 3-methyl-1,2-cyclohexanedicarboxylic acid monoester (3-methylhexahydrophthalic acid monoester), 4-methyl-1,2-cyclohexanedicarboxylic acid monoester (4-methylhexahydrophthalic acid monoester), methylhexahydrophthalic acid monoester, methyltetrahydrophthalic acid monoester, 4-methyl-4-cyclohexene-1,2-dicarboxylic acid monoester At least one of monocarboxylic acid monoester, 3-methyl-4-cyclohexene-1,2-dicarboxylic acid monoester, tetrahydrophthalic acid monobutyl ester, tetrahydrophthalic acid monooctyl ester, tetrahydrophthalic acid monoisooctyl ester, tetrahydrophthalic acid monoisononyl ester, monobutyl phthalate, monooctyl phthalate, monoisooctyl phthalate, monosec-octyl phthalate, monoisononyl phthalate, methylhexahydrophthalic acid monobutyl ester, methylhexahydrophthalic acid monobutyl ester, methylhexahydrophthalic acid monooctyl ester and methylhexahydrophthalic acid monoisooctyl ester.

[0059] In the present invention, there is no particular limitation on the source of the dibasic acid monoester compound, for example, it can be obtained commercially, or it can be prepared by methods conventionally defined in the art, for example, it can be prepared by monoesterification reaction of dicarboxylic acid or acid anhydride with fatty alcohol or phenol. The present invention does not make any particular limitation on its specific operation method.

[0060] In the present invention, the base fuel has a wide range of choices. Preferably, the base fuel is selected from at least one of gasoline, diesel and kerosene, preferably diesel.

[0061] In the present invention, preferably, the diesel is petroleum-based diesel and / or coal-based diesel.

[0062] In the present invention, there is no particular limitation on the source of coal-based diesel. Preferably, the coal-based diesel is provided by coal-to-liquid diesel (CTL), preferably by direct coal-to-liquid diesel and / or indirect coal-to-liquid diesel, and more specifically, it can be a diesel fraction with a distillation range of 160-380°C from a petroleum-based source.

[0063] In the present invention, there is no particular limitation on the source of petroleum-based diesel. Preferably, the petroleum-based diesel is provided by diesel fuel for compression ignition engines, for example, it can be standard diesel fuel or non-standard diesel fuel, for example, it can be a fraction with a distillation range between 160-380°C after crude oil (petroleum) is processed by various refining processes in refineries such as atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, coking, hydrofining, hydrocracking and the like, or it can be a fuel for compression ignition internal combustion engines that meets the national standard GB 19147 for automotive diesel after being formulated.

[0064] In the present invention, there is no particular limitation on the physical and chemical property parameters of the base fuel.

[0065] In the present invention, there is no particular limitation on the content of each component in the composition. Preferably, based on the total mass of the composition, the content of the base fuel is 20-99% by mass, and the content of the composite smoke-reducing component is 1-80% by mass; further preferably, based on the total mass of the clean fuel, the content of the base fuel is 30-95% by mass, and the content of the composite smoke-reducing component is 5-70% by mass.

[0066] The present invention does not particularly limit the preparation method of the fuel composition. Preferably, the fuel composition can be prepared according to the following method: (1) preparing a composite smoke reduction component by using polymethoxy dialkyl ether, ester organic peroxide and / or dialkyl oxalate and lubricant; (2) blending the composite smoke reduction component prepared in step (1) with a base fuel to obtain a smoke reduction fuel composition. The present invention does not particularly limit the specific operating conditions, and those skilled in the art can adjust them according to actual conditions.

[0067] The second aspect of the present invention provides an application of the smoke reduction fuel composition described in the first aspect in a fuel engine in plateau areas.

[0068] The smoke-reducing fuel composition with the above-mentioned technical characteristics is used as a clean fuel in the present invention, which is particularly suitable for low-pressure environments in plateau areas, for example, plateau environments of 500-9000m. It can overcome the problems of reduced combustion pressure in the engine cylinder, incomplete combustion due to insufficient oxygen content in the intake air, and excessive carbon smoke in the exhaust gas caused by low air pressure in plateau areas, so that the compression ignition engine can achieve good energy saving and emission reduction under low-pressure environmental conditions at high altitudes.

[0069] The smoke reducing composition provided by the present invention is particularly suitable for use in low-pressure environments on plateaus, and can effectively reduce smoke emissions in tail gas. Preferably, the application conditions include: a pressure of 30-100 kPa, preferably a pressure of 40-90 kPa, and more preferably a pressure of 50-80 kPa. It should be noted that the pressure is atmospheric pressure.

[0070] The clean fuel provided by the present invention can reduce the carbon smoke emission content of the compression ignition engine by at least 5% under the above-mentioned plateau environmental conditions.

[0071] In the present invention, the application environment of the fuel composition is not particularly limited. Preferably, for other places where diesel engines are used except for the compression ignition engines under the above low-pressure environment, such as transportation vehicles (including various motor vehicles and ships) using diesel as fuel and engineering, mining, agricultural and forestry machinery and other technical fields powered by diesel engines, the carbon soot content of the exhaust gas discharged by the fuel product of the present invention is also significantly lower. Therefore, it is more efficient and cleaner from the perspective of environmental protection.

[0072] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, all the raw materials used are from commercially available products.

[0073] In the following examples, the test oils were tested on a test bench at simulated atmospheric pressures of 45 kPa, 60 kPa, 70 kPa, 90 kPa and 100 kPa, respectively, and the soot emissions of the engine burning diesel and the formulated smoke-reducing fuel composition were measured, respectively, with smoke density as the evaluation technical indicator, and the unit is 1 / m.

[0074] The basic physical and chemical properties of the base diesel used in the bench test are shown in Table 1.

[0075] Table 1

[0076]

[0077]

[0078] Example 1

[0079] Step (1): Preparation of composite smoke reduction components:

[0080] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8 ), purchased from Jinan Yongchen Chemical Co., Ltd., with a purity of 99%; tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd., with a purity of 97%. Monobutyl maleate, purchased from Shanghai MacLean Biochemical Technology Co., Ltd., with a purity of 97%.

[0081] 9 kg of polymethoxy dimethyl ether, 0.99 kg of tert-butyl peroxide 2-ethylhexanoate and 0.01 kg of monobutyl maleate were mechanically mixed and uniformly prepared as a composite smoke reduction component for use. The mass ratio of polymethoxy dimethyl ether to tert-butyl peroxide 2-ethylhexanoate was approximately 9:1. In the prepared composite smoke reduction component, the mass proportion of polymethoxy dimethyl ether was 90%, the mass proportion of tert-butyl peroxide 2-ethylhexanoate was 9.9%, and the mass proportion of monobutyl maleate was 0.1%.

[0082] Step (2): Preparation of the special smoke reduction fuel composition for plateaus:

[0083] The composite smoke-reducing component prepared in step (1) is added to the base diesel and mechanically mixed to obtain a uniform mixture. The mass of the composite smoke-reducing component is 10 kg, the mass of the base diesel is 40 kg, and the mass ratio of the composite smoke-reducing component to the base diesel is 1:4. In the prepared plateau-specific clean diesel product, the mass proportion of the composite smoke-reducing component is 20%, and the mass proportion of the base diesel is 80%.

[0084] The basic physical and chemical properties of the plateau-specific smoke reduction fuel composition are shown in Table 2.

[0085] Table 2

[0086]

[0087]

[0088] Example 2

[0089] Step (1): Preparation of composite smoke reduction components:

[0090] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8 ), purchased from Jinan Yongchen Chemical Co., Ltd., with a purity of 99%; tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd., with a purity of 97%; monooctyl maleate, purchased from Shanghai MacLean Biochemical Technology Co., Ltd., with a purity of 95%.

[0091] 20 kg of polymethoxy dimethyl ether and 4 kg of tert-butyl peroxide 2-ethylhexanoate were mechanically mixed evenly, and 0.12 kg of monooctyl maleate was added to prepare a composite smoke reduction component for use. The mass ratio of polymethoxy dimethyl ether to tert-butyl peroxide 2-ethylhexanoate was 5:1. In the prepared composite smoke reduction component, the mass proportion of polymethoxy dimethyl ether was 82.9%, the mass proportion of tert-butyl peroxide 2-ethylhexanoate was 16.6%, and the mass proportion of monooctyl maleate was about 0.5%.

[0092] Step (2): Preparation of the special smoke reduction fuel composition for plateaus:

[0093] The composite smoke reduction component prepared in step (1) is added to the base diesel and mechanically mixed to obtain a uniform mixture. The mass of the composite smoke reduction component is 20 kg, the mass of the base diesel is 30 kg, and the mass ratio of the composite smoke reduction component to the base diesel is 1:1.5. In the prepared plateau-specific smoke reduction fuel composition product, the mass proportion of the composite smoke reduction component is 40%, and the mass proportion of the base diesel is 60%.

[0094] The basic physical and chemical properties of the plateau-specific smoke reduction fuel composition are shown in Table 3.

[0095] Table 3

[0096]

[0097]

[0098] Example 3

[0099] Step (1): Preparation of composite smoke reduction components:

[0100] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8 ), purchased from Jinan Yongchen Chemical Co., Ltd. with a purity of 99%; tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd. with a purity of 97%; diethyl oxalate, purchased from Nanjing Chengyi Chemical Co., Ltd. with a purity of 99%; monooctyl phthalate, purchased from Shanghai MacLean Biochemical Technology Co., Ltd. with a purity of 98%.

[0101] 20 kg of polymethoxy dimethyl ether, 4 kg of tert-butyl peroxide 2-ethylhexanoate and 1 kg of diethyl oxalate were mechanically mixed evenly, and 0.05 kg of monooctyl phthalate was added to prepare a composite smoke reduction component for use. The mass ratio of polymethoxy dimethyl ether, tert-butyl peroxide 2-ethylhexanoate and diethyl oxalate was 20:4:1. In the prepared composite smoke reduction component, the mass proportion of polymethoxy dimethyl ether was 79.8%, the mass proportion of tert-butyl peroxide 2-ethylhexanoate was 16%, the mass proportion of diethyl oxalate was 4%, and the mass proportion of monooctyl phthalate was about 0.2%.

[0102] Step (2): Preparation of the special smoke reduction fuel composition for plateaus:

[0103] The composite smoke reduction component prepared in step (1) is added to the base diesel and mechanically mixed to obtain a uniform mixture. The mass of the composite smoke reduction component is 30 kg, the mass of the base diesel is 70 kg, and the mass ratio of the composite smoke reduction component to the base diesel is 3:7. In the prepared plateau-specific smoke reduction fuel composition product, the mass proportion of the composite smoke reduction component is 30%, and the mass proportion of the base diesel is 70%.

[0104] The basic physical and chemical properties of the plateau-specific smoke reduction fuel composition are shown in Table 4.

[0105] Table 4

[0106]

[0107]

[0108] Example 4

[0109] Step (1): Preparation of composite smoke reduction components:

[0110] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8 ), purchased from Jinan Yongchen Chemical Co., Ltd., with a purity of 99%; monooctyl maleate, purchased from Shanghai MacLean Biochemical Technology Co., Ltd., with a purity of 95%.

[0111] 19.98 kg of polymethoxy dimethyl ether was added with 0.02 kg of monooctyl maleate to prepare a composite smoke reduction component for use. In the prepared composite smoke reduction component, the mass proportion of polymethoxy dimethyl ether was 99.9%, and the mass proportion of monooctyl maleate was about 0.1%.

[0112] Step (2): Preparation of the special smoke reduction fuel composition for plateaus:

[0113] The composite smoke reduction component prepared in step (1) is added to the base diesel and mechanically mixed to obtain a uniform mixture. The mass of the composite smoke reduction component is 20 kg, the mass of the base diesel is 80 kg, and the mass ratio of the composite smoke reduction component to the base diesel is 1:4. In the prepared plateau-specific smoke reduction fuel composition product, the mass proportion of the composite smoke reduction component is 20%, and the mass proportion of the base diesel is 80%.

[0114] The basic physical and chemical properties of the plateau-specific smoke reduction fuel composition are shown in Table 5.

[0115] Table 5

[0116]

[0117]

[0118] Example 5

[0119] Step (1): Preparation of composite smoke reduction components:

[0120] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8), purchased from Jinan Yongchen Chemical Co., Ltd. with a purity of 99%; tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd. with a purity of 97%; diethyl oxalate, purchased from Nanjing Chengyi Chemical Co., Ltd. with a purity of 99%; monooctyl phthalate, purchased from Shanghai MacLean Biochemical Technology Co., Ltd. with a purity of 98%.

[0121] 10 kg of polymethoxy dimethyl ether, 8 kg of tert-butyl peroxide 2-ethylhexanoate and 2 kg of diethyl oxalate were mechanically mixed evenly, and 0.01 kg of monooctyl phthalate was added to prepare a composite smoke reduction component for use. The mass ratio of polymethoxy dimethyl ether, tert-butyl peroxide 2-ethylhexanoate and diethyl oxalate was 10:8:2. In the prepared composite smoke reduction component, the mass proportion of polymethoxy dimethyl ether was 49.97%, the mass proportion of tert-butyl peroxide 2-ethylhexanoate was 39.98%, the mass proportion of diethyl oxalate was 10%, and the mass proportion of monooctyl phthalate was about 0.05%.

[0122] Step (2): Preparation of the special smoke reduction fuel composition for plateaus:

[0123] The composite smoke reduction component prepared in step (1) is added to the base diesel and mechanically mixed to obtain a uniform mixture. The mass of the composite smoke reduction component is 5 kg, the mass of the base diesel is 95 kg, and the mass ratio of the composite smoke reduction component to the base diesel is 5:95. In the prepared plateau-specific smoke reduction fuel composition product, the mass proportion of the composite smoke reduction component is 5%, and the mass proportion of the base diesel is 95%.

[0124] The basic physical and chemical properties of the plateau-specific smoke reduction fuel composition are shown in Table 6.

[0125] Table 6

[0126]

[0127]

[0128] Comparative Example 1

[0129] Step (1): Preparation of additional components:

[0130] Raw materials: tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd., with a purity of 97%; diethyl oxalate, purchased from Nanjing Chengyi Chemical Co., Ltd., with a purity of 99%.

[0131] 15 kg of tert-butyl peroxide 2-ethylhexanoate and 5 kg of diethyl oxalate are mechanically mixed and evenly set aside, the mass ratio of tert-butyl peroxide 2-ethylhexanoate to diethyl oxalate is 15:5, and in the prepared additional components, the mass proportion of tert-butyl peroxide 2-ethylhexanoate is 75%, and the mass proportion of diethyl oxalate is 25%.

[0132] Step (2): Preparation of blended diesel:

[0133] The blending component prepared in step (1) is added to the base diesel and mechanically mixed evenly. The mass of the blending component is 1 kg, the mass of the base diesel is 99 kg, and the mass ratio of the added component to the base diesel is 1:99. In the prepared blended diesel product, the mass proportion of the blending component is 1%, and the mass proportion of the base diesel is 99%.

[0134] The basic physical and chemical properties of the blended diesel are shown in Table 7.

[0135] Table 7

[0136]

[0137]

[0138] Comparative Example 2

[0139] Step (1): Preparation of additional components:

[0140] Raw materials: polyoxymethylene dimethyl ether (PODE 3-8 ), purchased from Jinan Yongchen Chemical Co., Ltd. with a purity of 99%; tert-butyl peroxy 2-ethylhexanoate (TBPO), purchased from Zibo Xusheng Chemical Co., Ltd. with a purity of 97%; dimethyl oxalate, purchased from Nanjing Chengyi Chemical Co., Ltd. with a purity of 99%.

[0141] 8 kg of polymethoxy dimethyl ether, 8 kg of tert-butyl peroxide 2-ethylhexanoate and 4 kg of dimethyl oxalate are mechanically mixed and evenly set aside. The mass ratio of polymethoxy dimethyl ether, tert-butyl peroxide 2-ethylhexanoate and dimethyl oxalate is 8:8:4. In the prepared additional components, the mass proportion of polymethoxy dimethyl ether is 40%, the mass proportion of tert-butyl peroxide 2-ethylhexanoate is 40%, and the mass proportion of diethyl oxalate is 20%.

[0142] Step (2): Preparation of blended diesel:

[0143] The blending component prepared in step (1) is added to the base diesel and mechanically mixed evenly. The mass of the blending component is 1 kg, the mass of the base diesel is 99 kg, and the mass ratio of the added component to the base diesel is 1:99. In the prepared blended diesel product, the mass proportion of the added component is 1%, and the mass proportion of the base diesel is 99%.

[0144] The basic physical and chemical properties of the blended diesel are shown in Table 8.

[0145] Table 8

[0146]

[0147]

[0148] Test Example 1

[0149] The smoke reduction fuel composition products prepared in the above examples and comparative examples were subjected to engine power evaluation tests on an engine bench, and the results are shown in Table 9.

[0150] Table 9

[0151]

[0152]

[0153] Test Example 2

[0154] The composition products prepared in the above examples and comparative examples were subjected to a high frequency reciprocating test method (HFRR) and the average wear spot diameter value (WSD) was reported. The evaluation method was SH / T 0765 "Diesel lubricity evaluation method (high frequency reciprocating test machine method)". The results are shown in Table 10.

[0155] Table 10

[0156] project Lubricity / μm Basic diesel 640 Example 1 368 Example 2 357 Example 3 373 Example 4 298 Example 5 389 Comparative Example 1 589 Comparative Example 2 558

[0157] It can be seen from the above examples that the use of the smoke reducing fuel composition product provided by the present invention can significantly reduce smoke emissions compared to basic diesel in the same low-pressure environment (same altitude range); on the other hand, the lubricity of diesel is significantly improved. GB 19147 "Automotive Diesel" requires that the lubricity of diesel is not higher than 460 μm, and the lubricity of the composition product provided by the present invention can meet the use requirements.

[0158] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A smoke reduction fuel composition, characterized in that: The composition comprises a base fuel and a composite smoke reduction component, wherein the composite smoke reduction component comprises a polymethoxy dialkyl ether, an ester organic peroxide and / or a dialkyl oxalate, and a dibasic acid monoester compound; Among them, based on the total mass of the composite smoke reduction component, the content of the polymethoxy dialkyl ether is 10-99.9% by mass, the content of the ester organic peroxide is 0-90% by mass, the content of the dialkyl oxalate is 0-70% by mass, the content of the dibasic acid monoester compound is 0.01-30% by mass, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time.

2. The composition according to claim 1, wherein Based on the total mass of the composite smoke reduction component, the content of the polymethoxy dialkyl ether is 30-99.9% by mass, the content of the ester organic peroxide is 0-69% by mass, the content of the dialkyl oxalate is 0-50% by mass, the content of the dibasic acid monoester compound is 0.03-20% by mass, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time; Preferably, based on the total mass of the composite smoke reduction component, the content of the polymethoxy dialkyl ether is 50-99.9% by mass, the content of the ester organic peroxide is 0-30% by mass, the content of the dialkyl oxalate is 0-20% by mass, the content of the dibasic acid monoester compound is 0.05-10% by mass, and the content of the ester organic peroxide and the content of the dialkyl oxalate are not zero at the same time.

3. The composition according to claim 1 or 2, wherein The polymethoxy dialkyl ether has a structure shown in formula (I), [CH3(CH2) x Oh] m1 (CH2O) m2 (CH2) y CH3 formula (I) In formula (I), x and y are each independently 0-30, preferably 1-15, more preferably 1-10, and even more preferably 1-5; m1 and m2 are each independently 1-20, preferably 1-10, and more preferably 1-8; Further preferably, m1 is 1-5, and m2 is 3-8; Preferably, the polymethoxydialkyl ether is selected from at least one of polymethoxydimethyl ether, polymethoxydiethyl ether, polymethoxydipropyl ether, polymethoxydibutyl ether, polymethoxydipentyl ether, polymethoxydihexyl ether, polymethoxydiheptyl ether, polymethoxydioctyl ether, polymethoxydinonyl ether and polymethoxydidecyl ether, and is further preferably selected from at least one of polymethoxydimethyl ether, polymethoxydiethyl ether, polymethoxydipropyl ether and polymethoxydibutyl ether.

4. The composition according to any one of claims 1 to 3, wherein The ester organic peroxide has a structure shown in formula (II), In formula (II), R1 is a C1-C10 alkyl group, R2 is a C1-C20 hydrocarbon group, preferably R1 is a C2-C8 alkyl group, R2 is a C4-C15 hydrocarbon group, more preferably R1 is a C4-C6 alkyl group, R2 is a C4-C12 hydrocarbon group; Preferably, the ester organic peroxide is selected from at least one of tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxyoctanoate, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-3,5,5-trimethylhexanoate, tert-butyl peroxypivalate, tert-butyl peroxyneodecanoate, tert-butyl peroxypivalate, tert-butyl peroxybenzoate and tert-butyl peroxylaurate.

5. The composition according to any one of claims 1 to 4, wherein The dialkyl oxalate has the general formula (III), CH3R s OOCCOOR t CH3 formula (III) In formula (III), Rs and Rt are each independently a C0-C10 hydrocarbon group, preferably a C0-C8 hydrocarbon group; Preferably, the dialkyl oxalate is selected from at least one of dimethyl oxalate, diethyl oxalate, ethyl methyl oxalate, methyl butyl oxalate, methyl isopropyl oxalate, ethyl butyl oxalate, dibutyl oxalate and dioctyl oxalate.

6. The composition according to any one of claims 1 to 5, wherein The dibasic acid monoester compound has a structural formula shown in formula (IV), In formula (IV), R3 is selected from C n H 2n-2 The hydrocarbon group, C n H 2n At least one of a hydrocarbon group and a cyclic hydrocarbon group, n is 0-18, preferably 2-4, R4 is a C1-C30 hydrocarbon group, preferably a C1-C18 hydrocarbon group; Preferably, the cyclic hydrocarbon group has a structure shown in formula (V), In formula (V), p is 1-8, q is 0-3, x is 0-8, y1 is 0-2, and y2 is 0-2.

7. The composition according to any one of claims 1 to 6, wherein The base fuel is selected from at least one of gasoline, diesel and kerosene, preferably diesel.

8. The composition according to claim 7, wherein Based on the total mass of the composition, the content of the base fuel is 20-99 mass %, and the content of the composite smoke reduction component is 1-80 mass %. Preferably, based on the total mass of the clean fuel, the content of the base fuel is 30-95% by mass, and the content of the composite smoke-reducing component is 5-70% by mass.

9. Use of the smoke-reducing fuel composition according to any one of claims 1 to 8 in fuel engines in plateau areas.

10. The use according to claim 9, wherein: The application conditions include: a pressure of 30-100 kPa, preferably a pressure of 40-90 kPa, and more preferably a pressure of 50-80 kPa.

Images