KR100999892B1 - Fuel composition comprising alcohol - Google Patents

Abstract

The present invention relates to an alcohol-based synthetic fuel, more specifically any one selected from the group consisting of ethanol, methanol and mixtures thereof; Isopropyl alcohol; toluene; The present invention relates to an alcohol-based synthetic fuel composition comprising an additive including xylene and 2-methyl butane, n-hexane, cyclo hexane, and methyl cyclopentane. The alcohol-based synthetic fuel composition of the present invention has a low vapor pressure compared to the conventional alcohol-based synthetic fuel has excellent safety, and has the advantage of significantly reducing the occurrence of vapor lock (Vapor Lock) or knocking (knocking) phenomenon, the existing It can be widely used as an alternative fuel for internal combustion engines that causes problems such as environmental pollution.

Alcohol Synthetic Fuel, Vapor Pressure, Steam Occlusion, Knocking Phenomena, Octane Number

Description

Alcohol-based synthetic fuel composition {FUEL COMPOSITION COMPRISING ALCOHOL}

The present invention relates to an alcohol based synthetic fuel composition.

With the oil shock of the 1970s, the depletion of petroleum resources emerged, and the environmental pollution caused by fossil fuels began to be a concern of the world. It is no exaggeration to say that the world is now at war with energy and the environment as fossil fuel depletion and environmental pollution become more serious. In particular, countries without petroleum resources, such as Korea, have to pay attention to the development of alternative energy, and in order to keep pace with the ever-increasing flow of international environmental regulations such as the Kyoto Protocol, the development of alternative fuels can no longer be rush. It is gone.

In order to overcome the problem of fossil fuel depletion and environmental pollution, alcohol is attracting attention as an alternative fuel. The alcohol-based alternative fuel containing alcohol as a main component can significantly reduce the generation of nitrogen oxides and sulfur oxides in the exhaust gas discharged when used in an internal combustion engine, and does not generate soot. In particular, among alcohols that are attracting attention as alternative fuels, methanol, which is a candidate group of alternative fuels, which has recently been in the spotlight, has an advantage that the octane number may be used in a high compression ratio engine at about 101.5.

In addition, industrial methanol requires considerable attention as a toxic raw material, and since it is harmful to the human body, research on alternative fuel using ethanol extractable from biomass such as plants is being conducted.

However, when only methanol or ethanol is applied to an existing gasoline engine as an alternative fuel, a fuel tank capacity of more than twice the volume is required to travel the same distance because the calorific value per volume is only about half that of gasoline. In addition, when applied to a diesel engine, the ignition device is required separately because the cetane number is low, and the hydrophilicity is difficult to apply without changing the structure of the existing internal combustion engine, such as concerns about corrosion of accessories including the engine.

In order to solve these problems, alcohols are prepared by mixing certain substances in a specific ratio to solve problems related to low solidification point, high specific gravity, wide combustion range, and low calorific value compared to gasoline, without damaging the internal combustion engine. Research into alternative fuels is underway.

However, alcohol-based synthetic fuels, which are the result of previous studies on alcohol-based alternative fuels, are difficult to distribute and store because fuel components are separated from each other during long-term storage. Is occurring, that is, the knocking (knocking) occurs, and the initial output, such as initial startability and acceleration is low, the problem of incomplete combustion at high speed rotation has been pointed out. In addition, in the case of alcohol-based synthetic fuel, since the vapor pressure of alcohol increases a lot, there is a problem of being unstable.

In order to solve the problems of the prior art as described above, the present invention is an alcohol-based synthetic fuel in which a specific component is mixed in a specific content in one or more selected from the group consisting of methanol and ethanol has a lower vapor pressure than the conventional alcohol-based synthetic fuel An object of the present invention is to provide an alcohol-based synthetic fuel having excellent safety and significantly reducing occurrence of vapor lock phenomenon and knocking phenomenon.

In order to achieve the above object, the present invention is any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof; 1 to 6 parts by weight of isopropyl alcohol; 1 to 30 parts by weight of toluene; It provides a synthetic fuel composition comprising 1 to 15 parts by weight of xylene and 5 to 30 parts by weight of an additive. The additive may be one containing 2-methyl butane, n-hexane, cyclo hexane and methyl cyclopentane.

In addition, the present invention to achieve the above object, any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof; 1 to 6 parts by weight of isopropyl alcohol; 1 to 30 parts by weight of toluene; It provides a synthetic fuel composition comprising 1 to 15 parts by weight of xylene and 5 to 30 parts by weight of an additive. The additive is a hydrocarbon having 5 carbon atoms; Hydrocarbons having 6 carbon atoms; It may include a hydrocarbon having 7 carbon atoms and a hydrocarbon having 8 carbon atoms.

Hereinafter, the present invention will be described in more detail.

The inventors have found that the existing alcohol-based synthetic fuels are separated from each other when the fuel components are separated from each other when stored in a long-term tube, so that distribution and storage are difficult, knocking occurs during combustion, and initial start-up and acceleration may be achieved. The problem of low power, incomplete combustion at high speed, especially the high vapor pressure of alcohol, low safety as fuel, vapor lock phenomenon, and the problem that the fuel supply of engine is hindered. As a result, the alcohol-based synthetic fuel composition synthesized with the composition and content of the present invention controls the vapor pressure of the alcohol-based synthetic fuel while maintaining the advantages of solving the pollution problem, which is an advantage of the conventional alcohol-based synthetic fuel, and low production cost. To increase the safety as a fuel, not to block the steam phenomenon, distillation of alcohol-based synthetic fuel By the adjustment it improves the initial output of the initial startability and acceleration performance and to check that it is possible to prevent incomplete combustion, which can occur when high-speed rotation of the engine, thereby completing the present invention based on this.

In the present invention, the alcohol-based synthetic fuel composition means that at least one selected from the group consisting of methanol and ethanol is at least 40% by weight, preferably at least 50% by weight based on the total weight of the composition. Alcohol-based synthetic fuel compositions are developed and used in terms of economics as well as solving environmental problems. Therefore, when the content of the methanol, ethanol and mixtures thereof is less than 40% by weight, the economic effect of low production cost is not obtained, the alcohol-based synthetic fuel composition is one or more selected from the group consisting of methanol and ethanol It should be at least 40% by weight based on the weight of the composition. In addition, in this invention, a weight part compares content between each component, More specifically, it means the weight ratio of each component.

The present invention is any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof; 1 to 6 parts by weight of isopropyl alcohol; 1 to 30 parts by weight of toluene; A synthetic fuel composition comprising 1 to 15 parts by weight of xylene and 5 to 30 parts by weight of an additive.

The methanol or ethanol is known to significantly reduce the generation of carbon oxides, nitrogen oxides and sulfur oxides compared to the conventional gasoline fuel, so that the use of methanol or ethanol can reduce the harmful emissions generated during combustion and the cost of producing synthetic fuel It is inexpensive. On the other hand, when the content of methanol or ethanol is too high, the calorific value per volume of alcohol-based synthetic fuel is small, so the capacity of the fuel tank used in the existing internal combustion engine has to be increased, or there is a problem in that the accessories including the engine are corroded.

Due to the above advantages, the content of any one selected from the group consisting of methanol, ethanol and mixtures thereof may be 40 to 70 parts by weight, preferably 50 to 60 parts by weight, more preferably 50 to 51 parts by weight.

The isopropyl alcohol serves as a surfactant. In more detail, the isopropyl alcohol improves physical miscibility by reducing interfacial tension when the hydrophilic alcohol component methanol, ethanol or a mixture thereof is mixed with a hydrophobic hydrocarbon compound which is another component of the alcohol-based synthetic fuel composition. In addition, even when the fuel is stored for a long period of time, stability can be maintained by preventing phase separation, thereby facilitating distribution and storage, and improving the problem of knocking during combustion. On the other hand, this isopropyl alcohol is expensive, there is a problem in that the economic efficiency of the synthetic fuel composition as a substitute fuel when using more than a certain content.

Therefore, in order to obtain the above effects, isopropyl alcohol may be 1 to 6 parts by weight, preferably 2 to 4 parts by weight.

The toluene increases the explosive force and serves to improve the running performance. In addition, the xylene serves to improve the acceleration. The toluene and xylene can improve the economical efficiency of the alcohol-based fuel by improving the low output and low fuel consumption due to the lack of calorific value, which is a disadvantage of the alcohol-based fuel as an alternative fuel, can reduce the exhaust gas emissions by inducing complete combustion. have. On the other hand, when toluene or xylene is used in a predetermined amount or more, the use of excessive aromatic hydrocarbon compounds increases the likelihood of generating harmful emissions such as carbon oxides, nitrogen oxides and sulfur oxides.

Therefore, the content of toluene may be 1 to 30 parts by weight, preferably 7 to 25 parts by weight, more preferably 17 to 23 parts by weight, and the content of xylene is 1 to 15 parts by weight, preferably 7 To 10 parts by weight. The content of toluene may be adjusted according to the content of the additive.

The additive may be one containing 2-methyl butane, n-hexane, cyclo hexane and methyl cyclopentane.

In the case of adding the additive, since the interfacial tension between the hydrophilic alcohol component and the hydrophobic hydrocarbon compound of the alcohol-based synthetic fuel composition is reduced to improve physical miscibility, separation between composition components is prevented, and the alcohol-based synthetic fuel composition Methane tertiary butyl ether, an existing octane number improver recognized as an environmental pollutant because it maintains an optimal combustion state and improves flammability and contaminates groundwater or soil and is recognized as a carcinogen and does not have good biodegradation. The octane number of the alcohol-based synthetic fuel composition is improved without using (methyl tertiary butyl ether, MTBE), and above all, the vapor pressure of the fuel composition is lowered, thereby improving the safety of the fuel composition. It is similar to or better than.

In order to maintain the economics of the alcohol-based synthetic fuel composition, while maintaining the effect, the content of the additive may be 5 to 30 parts by weight, preferably 14 to 27 parts by weight, more preferably 16 to 21 parts by weight. .

The 2-methyl butane may improve the cold startability in winter by adjusting the flash point, but when used in a predetermined amount or more, a problem of increasing the vapor pressure of the alcohol-based synthetic fuel composition may occur.

Therefore, the content of 2-methyl butane may be 5 to 15% by weight, preferably 8 to 12% by weight based on the total weight of the additive.

The n-hexane serves as a cleaning agent of the internal combustion engine and induces complete combustion of the fuel, thereby increasing the calorific value of the fuel, but when used in a predetermined amount or more, bleaching and corrosion of alcohol-based fuel may occur. .

Therefore, the content of n-hexane may be 10 to 20% by weight, preferably 13 to 17% by weight based on the total additive weight.

The cyclohexane may prevent the occurrence of abnormal ignition during the combustion of the fuel and control the flash point. However, when the cyclohexane is used above a certain content, the cyclohexane may cause whitening and corrosion of the alcohol-based fuel.

Therefore, the content of the cyclo hexane may be 5 to 15% by weight, preferably 7 to 12% by weight based on the total additive weight.

The methyl cyclopentane may serve to improve the complexability by maintaining the optimum combustion state of the raw material. In addition, when aromatic hydrocarbons are burned, it is possible to induce complete combustion to prevent soot, improve miscibility between materials, and adjust flash point.

In order to maintain the effect, in order to maintain the economics of the alcohol-based synthetic fuel composition, the content of the methyl cyclopentane may be 20 to 50% by weight, preferably 30 to 35% by weight based on the total additive weight.

In addition, in order to obtain the effect of the additive, specifically, the miscibility between components of the alcohol-based synthetic fuel composition is improved, the complexability and octane number of the alcohol-based synthetic fuel composition are improved, and above all, the alcohol pressure is lowered by lowering the vapor pressure. In order to improve the safety of the composition, the additive composition is n-pentane, cyclopentane, 2-methyl pentane, 3-methyl pentane, n-heptane, 2-methyl hexane, cyclo heptane, methyl cyclo hexane, n-octane, 2 It may further comprise one or more selected from the group consisting of, 2,4-trimethyl pentane and ethyl cyclo hexane.

In particular, in order to maintain the economics of the alcohol-based synthetic fuel composition while maintaining the effect of the additive, the content of the methyl cyclohexane may be 3 to 5% by weight based on the total additive weight, the ethyl cyclohexane is 2 To 3% by weight.

When the additive is added, the miscibility between components of the alcohol-based synthetic fuel composition is improved, the flammability of the alcohol-based synthetic fuel composition is improved, and the octane number is improved, and above all, the vapor pressure is lowered. The octane number (RON) measured by GB / T 5487 may be 106 or more, specifically 106 to 130, and the anti-knock index ((RON + MON) / 2) measured by test standard GB / T 503 is 95 or more. The vapor pressure at 37.8 ° C measured by the test standard GB / T 8017 may be 40 Kpa or less, specifically 20 to 38.5 Kpa or less, more specifically 25 to 28 Kpa, and according to the test standard GB / T 11132 The measured olefin content is 6.5% by volume (vol%), specifically 0.8-6.5% by volume, and the benzene content measured by test standard SH / T0693 may be 0.1% by volume or less.

In particular, the alcohol-based synthetic fuel composition has a vapor pressure of 40 Kpa or less, specifically 20 to 38.5 Kpa or less, more specifically 25 to 28 Kpa, measured at 37.8 ° C. as measured by the test standard GB / T 8017 in the properties. The olefin content measured by reference GB / T 11132 may be 6.5% by volume (vol%), specifically 0.8-6.5% by volume.

In addition, the present invention is any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof; 1 to 6 parts by weight of isopropyl alcohol; 1 to 30 parts by weight of toluene; Alcohol-based synthetic fuel composition comprising 1 to 15 parts by weight of xylene and 5 to 30 parts by weight of the additive may be one containing a hydrocarbon of 5 carbon atoms, a hydrocarbon of 6 carbon atoms, a hydrocarbon of 7 carbon atoms and a hydrocarbon of 8 carbon atoms. have.

The hydrocarbon having 5 carbon atoms may include one or more selected from the group consisting of n-pentane, 2-methyl butane and cyclopentane. The hydrocarbon having 5 carbon atoms solves the problem of lowering the initial startability of the winter season, which is a disadvantage of the alcohol synthetic fuel, and is effective in preventing knocking by raising the octane number of the alcohol-based synthetic fuel composition. Since the vapor pressure of the fuel composition may be increased and the output may be decreased, the content of the hydrocarbon having 5 carbon atoms may be 10 to 20% by weight, preferably 14 to 18% by weight based on the total weight of the additive.

The hydrocarbon having 6 carbon atoms may include one or more selected from the group consisting of n-hexane, 2-methyl pentane, 3-methyl pentane, cyclo hexane, and methyl cyclopentane. The hydrocarbon having 6 carbon atoms can compensate for the shortage of calorific value, which is a disadvantage of the synthetic fuel of alcohol, and maintain the optimum combustion state to improve the flammability, improve the miscibility between components, but if a certain amount is used Since the function as a fuel is lowered and there is a problem in economy, the content of the hydrocarbon having 6 carbon atoms may be 60 to 75% by weight, preferably 65 to 70% by weight based on the total weight of the additive.

The hydrocarbon having 7 carbon atoms is n-heptane, 2-methyl hexane, cycloheptane, methyl cyclohexane, 3-methyl hexane, 2,3-dimethyl pentane, 2,4-dimethyl pentane, 2,2'-dimethyl pentane, 3 At least one selected from the group consisting of, 3'-dimethyl pentane, 3-ethyl pentane, 2,2 ', 3-trimethyl butane, preferably n-heptane, 2-methyl hexane, cycloheptane, methyl cyclohexane It may include one or more selected from the group consisting of. The hydrocarbon having 7 carbon atoms is effective in preventing soot, but when a certain amount or more is used, it may cause knocking by degrading the performance of the engine and fuel. To 15% by weight, preferably 9 to 13% by weight.

The hydrocarbon having 8 carbon atoms is n-octane, 2,2,4-trimethyl pentane and ethyl cyclo hexane, 2-methyl heptane, 3-methyl heptane, 4-methyl heptane, 2,2'-dimethyl hexane, 3,3 ' -Dimethyl hexane, 4,4'-dimethyl hexane, 2,3-dimethyl hexane, 2,4-dimethyl hexane, 2,5-dimethyl hexane, 3,4-dimethyl hexane, 3-ethyl hexane, 2,3,4 -Trimethyl pentane, 3-ethyl-2-methylpentane, 2,2 ', 3-trimethylpentane, 2,2'-4-trimethylpentane, 2,3,3'-trimethylpentane, 2,2', 3, It may be one or more selected from the group consisting of 3'-tetramethylbutane, preferably one or more selected from the group consisting of n-octane, 2,2,4-trimethyl pentane and ethyl cyclo hexane. The hydrocarbon having 8 carbon atoms is a material capable of transferring the flame generated by the ignition to the compounds having a higher distillation temperature, which may provide the sustainability of the combustion and improve the acceleration. In addition, since the economy may be impaired, the content of the hydrocarbon having 8 carbon atoms may be 2 to 10% by weight, preferably 3 to 7% by weight based on the total weight of the additive.

delete

delete

Alcohol-based synthetic fuel composition of the present invention is difficult to distribute and store due to the separation between the components, which is a problem of the conventional alcohol-based synthetic fuel, knocking phenomenon occurs during the combustion process, the initial starting and acceleration Solve the problem of low output, high vapor pressure of alcohol, low safety as fuel, and vapor lock phenomenon, solve the pollution problem, which is the advantage of the synthetic alcohol, and low production cost While maintaining the pressure, the safety of the fuel is increased by adjusting the vapor pressure of the alcohol-based synthetic fuel, the steam occlusion does not occur, and the initial output such as the initial startability and acceleration is improved by adjusting the distillation range of the alcohol-based synthetic fuel It is similar to or better than gasoline, which is the fuel of internal combustion engines. Since the width can be widely used, it will be that a very large industrial effect.

Hereinafter, the preparation examples and examples are presented in order to explain the present invention in more detail. However, the following Preparation Examples and Examples are merely illustrated to aid the understanding of the present invention, and may be modified in various other forms, and the scope of the present invention is not limited to the following Examples.

Production Example :

Synthetic fuel composition having a composition as shown in [Table 1] and [Table 2] was prepared for the properties test for the synthetic fuel according to the present invention. In the preparation of the composition, methanol or ethanol and isopropyl alcohol (IPA), toluene and xylene were sequentially added to the stirrer and stirred at room temperature for at least 3 hours to completely dissolve, and then other fuel additives were slowly added and mixed. The mixture was aged at room temperature for at least 3 hours to prepare a fuel according to the present invention.

The production of the automotive fuel composition of the present invention was carried out by a method of first pumping a dense co-solvent component through a port at the bottom of the blending tank and slowly stirring to prevent exhaust loss due to evaporation.

On the other hand, Comparative Example 1 was prepared by the method described in Chinese Patent No. 00100080.6, Comparative Example 2 by the method described in Republic of Korea Patent No. 0740486, and Comparative Example 3 by the method described in Republic of Korea Patent No. 0347257.

TABLE 1

Additive (wt%) Alcohol (wt%) Aromatic Hydrocarbons (wt%) Methanol ethanol IPA toluene Xylene Example 1 14 - 50 3 25 8 Example 2 25 54 - 3 9 9 Example 3 23 58 - 3 8 8 Example 4 17 51 - 3 20 9 Example 5 27 52 - 3 9 9

TABLE 2

Ingredient of the additive

ingredient Content (wt%) sub Total N-PENTANE 0.6% 15.8% 2-METHYL BUTANE 9.7% CYCLO-PENTANE 5.5% N-HEXANE 14.3% 68.2% 2-METHYL PENTANE 9.2% 3-Methyl PENTANE 4.0% CYCLO HEXANE 8.8% METHYL CYCLO PENTANE 31.9% N-HEPTANE 3.83% 11.33% 2-METHYL HEXANE 1.5% CYCLO HEPTANE 1.0% METHYL CYCLO HEXANE 5.0% N-OCTANE 0.45% 4.67% ISO-OCTANE 1.7% ETHYL CYCLO HEXANE 2.52%

Experimental Example  One

In order to confirm whether an embodiment of the present invention can be used as a synthetic liquid fuel for an internal combustion engine, the property test for the synthetic liquid fuel was performed by requesting the National Petroleum Quality Control Supervision Center of the People's Republic of China, and the results are as follows. Table 3 shows. The Chinese national standard described in Table 3 below is a quality standard value for ethanol fuel for vehicles.

[Table 3]

Test Items China National Standard Pattern fuel Test standard R.O.N Min 90 ~ 97 106 GB / T 5487 (RON + MON) / 2 Min 80 ~ 90 98.5 GB / T 503 Distillation Range, ℃
10%
50%
90%
FBP
Residue, ml
Max 70
Max 120
Max 190
Max 205
Max 2
69.3
77.0
86.4
109.7
0.6 GB / T 8536 R.V.P (37.8 ° C, Kpa) Max 88 32 GB / T 8017 Induction Period, Min Min 480 480 GB / T 8018 Phosphorus (g / l) Max 0.005 <0.0025 GB / T 8020 Benzene (vol%) Max 2.5 〈0.10 SH / T 0693; SH / T 0713 Oleffin (vol%) Max 35 0.8 GB / T 11132; SH / T 0741 Aromatic (vol%) Max 40 33.3 GB / T 11132; SH / T 0741 Copper Corrosion (50 ℃, 3 hrs) Max 1 1a GB / T 5096 Existent Gum (mg / 100ml) 5 One GB / T 8019 Doctor test Sweet Sweet SH / T 0®; GB / T 1792 Alcohol Content (vol%) 10 ± 2.0 〉 12.0 SH / T 0663 W / Sediment (vol%) Max 0.2 0.065 SH / T 0246

As shown in Table 3, the synthetic fuel of Example 1 of the present invention was found that the octane (RON) is superior to the Chinese national standard, the output of the fuel increases, (RON + MON) / 2 is the Chinese country It is confirmed that knocking can be significantly reduced because it is superior to the standard, and the steam pressure is 32.0 Kpa, which is located in the range of the Chinese national standard, and it is confirmed that a stable level is maintained.

Therefore, the alcohol-based synthetic fuel composition of the present invention exhibited significantly better performance than the alcohol fuel standard of the existing Chinese national standard, and was found to be suitable as a synthetic liquid fuel for internal combustion engines.

Experimental Example  2

The inventors of the present invention compared Comparative Example 1, which is an alcohol fuel of a Chinese patent, and Comparative Example 2, which is an alcohol fuel of a conventional Korean patent, were compared with octane number, distillation phase, and other components, and the results are shown in Table 4 below.

[Table 4]

Test Items Test method Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Example 5 Octane number (RON) GB / T 5487 - 108 106 112.2 116.7 120.5 116.3 Distillation phase, ℃
10% outflow temperature
50% outflow temperature
90% outflow temperature
End point
Residual volume, ml


GB / T 6536


166
56.8
75.0
139.0
160.5
0.6
69.3
77.0
86.4
109.7
0.6
61.0
64.0
108.0
138.0
1.0
61.0
64.0
78.0
135.0
1.0
62.0
68.0
112.0
135.0
1.0
62.0
65.0
110.0
130.0
1.0 Aromatic
(vol%) GB / T 11132 30 20 33.3 16.7 17.1 28.8 19.5 Oleffin
(vol%) GB / T 11132 12 7.0 0.8 6.5 6.3 5.6 4.8 Benzene
(vol%) SH / T 0693 2 0.7 0.10 0 0 0 0

As shown in Table 4, compared with Comparative Example 1, which is a Chinese patent, and Comparative Example 2, which is a Korean patent, an example of the present invention was confirmed to be excellent in octane number, distillation properties, and components.

More specifically, in Examples, Example 1 showed octane number similar to that of Comparative Example 2, and Examples 2 to 5 showed significantly better octane numbers than Comparative Example 2. In addition, the Examples of the present invention all showed a higher temperature than Comparative Example 2 at the distillation temperature of 10% fraction, in particular, Example 1 showed a significantly higher temperature than Comparative Example 2.

Experimental Example  3

Whether the embodiment of the present invention is excellent fuel safety compared to the comparative example of the conventional alcohol-based synthetic fuel was confirmed through the vapor pressure, the results are shown in Table 5 below.

 TABLE 5

Test Items Test method Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Example 3 Example 4 Example 5 R.V.P (37 ℃, Kpa) GB / T 8017 68 67 70.5 32 38.2 38.2 26.4 30.3

As shown in Table 5, all of the examples of the present invention was confirmed to have a significantly lower vapor pressure than the comparative examples 1 to 3 of the prior art.

A feature of the present invention is to solve the problems that the conventional alcohol-based fuel has a high vapor pressure, the safety is low, the steam occlusion phenomenon, knocking phenomenon, etc. occur, higher than 60 Kpa, which is the minimum standard required for fuel safety It has been found to have a significantly lower vapor pressure than the technology, and the present invention has been found to have significantly superior safety and efficacy compared to the prior art.

Claims (7)

Any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof, 1 to 6 parts by weight of isopropyl alcohol, 1 to 30 parts by weight of toluene, 1 to 15 parts by weight of xylene and Alcohol-based synthetic fuel composition containing 5 to 30 parts by weight of the additive, Wherein said additive comprises 2-methyl butane, n-hexane, cyclo hexane and methyl cyclopentane Alcohol-based synthetic fuel composition. delete The method of claim 1, The additives are n-pentane, cyclopentane, 2-methyl pentane, 3-methyl pentane, n-heptane, 2-methyl hexane, cycloheptane, methyl cyclohexane, n-octane, 2,2,4-trimethyl pentane and ethyl It further comprises one or more selected from the group consisting of cyclohexane Alcohol-Based Synthetic Fuel Compositions. The method of claim 1, The alcohol-based synthetic fuel composition has a vapor pressure of 40 Kpa or less at 37.8 ° C. measured by the test standard GB / T 8017, an olefin content of 6.5 vol% or less measured by the test standard GB / T 11132, and test standard SH. Alcohol-based synthetic fuel composition having a benzene content of 0.1% by volume or less as measured by / T0693. Any one selected from the group consisting of 40 to 70 parts by weight of methanol, ethanol and mixtures thereof, 1 to 6 parts by weight of isopropyl alcohol, 1 to 30 parts by weight of toluene, 1 to 15 parts by weight of xylene and Synthetic fuel composition comprising 5 to 30 parts by weight of the additive, The additive hydrocarbons having 5 carbon atoms containing at least one selected from the group consisting of n-pentane, 2-methyl butane and cyclopentane; hydrocarbons having 6 carbon atoms including at least one selected from the group consisting of n-hexane, 2-methyl pentane, 3-methyl pentane, cyclo hexane and methyl cyclopentane; a hydrocarbon having 7 carbon atoms containing at least one member selected from the group consisting of n-heptane, 2-methyl hexane, cycloheptane, methyl cyclohexane, and hydrocarbons having 8 or more carbon atoms, including one or more selected from the group consisting of n-octane, 2,2,4-trimethyl pentane and ethyl cyclohexane To include Alcohol-based synthetic fuel composition. The method of claim 5, The content of the additive component is based on the total weight of the additive, 10 to 20% by weight of hydrocarbons of 5 carbon atoms, 60 to 75% by weight of hydrocarbons of 6 carbon atoms, 5 to 15% by weight of hydrocarbons of 7 carbon atoms, 8 has from 2 to 10% by weight of hydrocarbon Alcohol-Based Synthetic Fuel Compositions. delete