JP2002338974A - Fuel oil composition for gasoline engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fuel oil composition for a gasoline engine which maintains high operational performance and, simultaneously, has a reduced environmental load. SOLUTION: This fuel oil composition for a gasoline engine has (1) a research octane number of >=96.0, (2) a Reid vapor pressure of 47-60 kPa, and (3) a benzene content of <=1 vol.%, and preferably further (4) a sulfur content of <=10 ppm, and more preferably further (5) distillation properties such that the 10% distillate temperature is 40 deg.C to lower than 60 deg.C; the 30% distillate temperature is 60 to 80 deg.C; the 50% distillate temperature is 85 deg.C to 105 deg.C; the 70% distillate temperature is 110 deg.C to lower than 130 deg.C; and the 90% distillate temperature is 130 deg.C to 160 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a fuel oil composition for a gasoline engine. More specifically, the present invention relates to a fuel oil composition for a gasoline engine which maintains high driving performance and has a low environmental load.

[0002]

2. Description of the Related Art In recent years, demands for high-performance gasoline having high driving performance have been increasing year by year as automobiles become more sophisticated. On the other hand, environmental pollution by automobile fuel has become a social problem. Therefore, there is a strong need for a vehicle fuel that maintains high driving performance and has a low environmental load. Automobile fuels having high driving performance include those containing an oxygen-containing base material such as methyl t-butyl ether (MTBE) and those containing a large amount of aromatic components. Also, there is a problem that the environmental load is large due to the deterioration of the exhaust gas properties. For example, a fuel containing an oxygen-containing base material is inevitable that the amount of aldehyde in the exhaust gas increases, and a fuel containing a large amount of aromatics is
The amount of aromatic compounds in the non-gas increases. It is also desired to reduce environmental pollution by volatilization of low-boiling fractions in automobile fuels. However, simply reducing the low-boiling fractions in fuel will cause deterioration of driving performance, especially startability. Occurs. Furthermore, by reducing the sulfur content of automobile fuel, the environmental load is reduced by maintaining the performance of the exhaust gas purification catalyst (particularly, the reduction of hydrocarbons, NOx, CO, etc. in exhaust gas).
However, depending on the properties of the base material used and the blending ratio, the reduction in sulfur content may cause deterioration in the operation performance of the product.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel oil composition for a gasoline engine which maintains high driving performance and has a low environmental load under such circumstances. .

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to develop a fuel oil composition for a gasoline engine having the above-mentioned preferable properties. As a result, a fuel oil composition having a specific property has been obtained. It has been found that the purpose can be achieved. The present invention has been completed based on such findings.

That is, the present invention relates to (1) a method wherein the octane number of the research method is 96.0 or more and the Reid vapor pressure is 47 to 6;
0 kPa, and a benzene content of 1% by volume or less, a fuel oil composition for a gasoline engine,
(2) a fuel oil composition for a gasoline engine, which has a research octane number of 96.0 or more, a Reid vapor pressure of 47 to 60 kPa, a benzene content of 1% by volume or less, and a sulfur content of 30 ppm or less; (3)
Research method octane number is 98.0 or more, motor method octane number is 85.0 or more, and Reid vapor pressure is 47-60.
kPa, benzene content is 1% by volume or less, sulfur content is 10 ppm or less, and distillation property is 10%.
0 ° C or higher and lower than 60 ° C, 30% distillation temperature 60-80 ° C, 5
0% distillation temperature 85-105 ° C, 70% distillation temperature 110 ° C
A fuel oil composition for gasoline engines characterized by a temperature of at least 130 ° C and a 90% distillation temperature of 130 to 160 ° C; As described above, the reed vapor pressure is 47 to 60 kPa and the benzene content is 1% by volume.
The sulfur content is 10 ppm or less, and the distillation property is 10 ppm or less.
% Distillation temperature 40 ° C or higher and lower than 60 ° C, 30% distillation temperature 60
８０80 ° C., 50% distillation temperature 85-105 ° C., 70% distillation temperature 110 ° C. or more and less than 130 ° C., 90% distillation temperature 130
~ 160 ° C, and the aromatic content is 45% by volume or less,
And a fuel oil composition for a gasoline engine, characterized in that the sum of the benzene content and the aromatic content is 10% by volume or less.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The fuel oil composition for a gasoline engine of the present invention has the following properties. First, the octane number (RON) of the research method is 96.0 or more,
Preferably it is 98.0 or more, more preferably 99.0 or more. If the RON is less than 96.0, high driving performance cannot be maintained. The motor method octane number (MON) is preferably 85.0 or more, and more preferably 8 or more, from the viewpoint of preventing a decrease in knock resistance during high-speed running.
It is 6.0 or more, particularly preferably 87.0 or more. The above RON and MON are JIS K2280
It is a value measured in accordance with.

Next, the Reid vapor pressure (RVP) is 47 to 6
The range is 0 kPa. If the RVP is less than 47 kPa, the startability is poor and the desired driving performance cannot be obtained.
If it exceeds kPa, the environmental load due to volatilization increases. This RVP is a value measured according to JIS K2258. Further, the benzene content is 1% by volume or less. If the benzene content exceeds 1% by volume, the amount of benzene discharged into the atmosphere by volatilization and exhaust gas increases, resulting in environmental pollution. In addition, this benzene content is a value measured based on the gas chromatography method of the Japan Petroleum Institute method JPI-5S-33-90.

[0008] The fuel oil composition of the present invention has the above properties and a sulfur content of 30 ppm or less, more preferably 20 ppm or less.
It is preferably at most 10 ppm, particularly preferably at most 10 ppm. When the sulfur content exceeds 30 ppm, the performance of the exhaust gas purifying catalyst is reduced, which causes an increase in the amount of hydrocarbons, CO, and NOx in the exhaust gas. This sulfur content is determined by JISK
This is a value measured in accordance with No. 2541. A more preferred fuel oil composition has a RON of 98.0 or more and a MON
Is 85.0 or more, RVP is 47 to 60 kPa, benzene content is 1% by volume or less, sulfur content is 10 ppm or less, and distillation property is 10%.
Less, 30% distillation temperature 60-80 ° C, 50% distillation temperature 8
A fuel oil composition having a temperature of 5 to 105 ° C, a 70% distillation temperature of 110 ° C or higher and less than 130 ° C, and a 90% distillation temperature of 130 to 160 ° C can be exemplified. By having the above-mentioned distillation properties, higher operation performance can be maintained.
In addition, this distillation property is a value measured according to JIS K2254.

In the present invention, in particular, having the above properties, the aromatic content is not more than 45% by volume, and the sum of the ten times the benzene content and the aromatic content is 50% by volume. The following fuel oil compositions are preferred. When the aromatic content exceeds 45% by volume, or when the sum of 10 times the benzene content and the aromatic content exceeds 50% by volume, the amount of aromatic emissions to the atmosphere due to volatilization and exhaust gas increases. And cause environmental pollution. The aromatic content is a value measured by a gas chromatography method according to the Japan Petroleum Institute method JPI-5S-33-90.

The fuel oil composition for a gasoline engine of the present invention having such properties is used as a base material in an amount of 45 to 65% by volume of debenzene-modified gasoline (PGPZ) and 1 to 20% by volume of an alkylated gasoline (ALG). 20-40% by volume of light cracked gasoline (LFG) and 1% by volume of oxygen-containing base material
By blending the following, preferably PGPZ5
0-60% by volume, ALG5-15% by volume, LFG25-
It can be prepared by blending 35% by volume and 0.5% by volume or less of the oxygen-containing base material. PGPZ, A
When the blend ratio of LG and LFG is within the above range, the obtained fuel oil composition can maintain high driving performance. On the other hand, if the amount of the oxygen-containing substrate exceeds 1% by volume, aldehydes in the exhaust gas may increase.
The alkylated gasoline (ALG) is obtained by adding a lower olefin such as propylene or butene to a hydrocarbon such as isobutane.
For example, methyl t-butyl ether (MTBE), ethyl t-butyl ether (ETBE), t-amyl ethyl ether (TAEE), and the like can be given.

Further, as other base materials, desulfurized light naphtha (DLN), cracked gasoline (FG) and the like can be used as required. In the present invention, PGPZ used as a base material has an RON of 100.5 or more, preferably 101.5 or more, more preferably 102.5 or more, because the obtained fuel oil composition has high operation performance. , MON is 88.5 or more, preferably 89.5 or more, more preferably 90.5 or more, and in order to improve the environmental performance of the obtained fuel oil composition, RVP is 50 kPa or less, preferably 48 kPa or less, more preferably 46 kPa or less, and the benzene content is 1.0% by volume or less, preferably 0.5% by volume or less, more preferably 0.3% by volume or less, Those having a sulfur content of 3 ppm or less are advantageous.

Further, as other properties, the distillation temperature is 3
It is preferable that the temperature is 0 to 200 ° C, the 50% distillation temperature is 120 to 140 ° C, and the specific gravity is 0.810 to 0.820. ALG has an RON of 91.5 or more, preferably 9 because the obtained fuel oil composition has high driving performance.
2.5 or more, more preferably 93.5 or more,
It is advantageous that N is 89.5 or more, preferably 90.5 or more, more preferably 91.5 or more. In order to improve the environmental performance of the obtained fuel oil composition, RVP Is 40 kPa or less, preferably 39 kPa or less, more preferably 38 kPa or less, and the benzene content is 0.5% by volume or less, preferably 0.3% by volume or less, and the sulfur content is 3 ppm or less. is there.

As another property, the distillation temperature is 3
It is preferable that the temperature is 0 to 210 ° C, the 50% distillation temperature is 95 to 115 ° C, and the specific gravity is 0.700 to 0.800. Further, LFG has an RON of 91.0 or more, preferably 9 because the obtained fuel oil composition has a high driving performance.
2.0 or more, more preferably 93.0 or more,
It is advantageous that N is 79.0 or more, preferably 80.0 or more, more preferably 81.0 or more. In order to improve the environmental performance of the obtained fuel oil composition, RVP Is 95 kPa or less, preferably 94 kPa or less, more preferably 93 kPa or less, the benzene content is 1.0% by volume or less, preferably 0.8% by volume or less, and the sulfur content is 30 ppm or less, preferably 20% by volume or less.
Less than ppm is advantageous.

The fuel oil of the present invention may optionally contain various additives as required. Examples of such additives include, for example, phenylenediamine-based, diphenylamine-based, alkylphenol-based, aminophenol-based antioxidants, polyetheramines, detergents such as polyalkylamines, Schiff-type compounds and thioamide-type compounds. Metal deactivators, surface ignition inhibitors such as organic phosphorus compounds, anti-icing agents such as polyhydric alcohols and ethers, alkali metal salts and alkaline earth metal salts of organic acids,
Combustion aids such as sulfates of higher alcohols, anionic surfactants, cationic surfactants, antistatic agents such as amphoteric surfactants, rust inhibitors such as alkenyl succinic acid esters, and discriminating agents such as quinizarin and coumarin Well-known fuel oil additives such as odorants such as natural essential oils and synthetic fragrances, and colorants such as azo dyes, can be used alone or in combination of two or more. The amount of these additives may be appropriately selected according to the situation, but it is generally desirable that the total amount of the additives be 0.1% by weight or less in the fuel composition.

[0015]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The properties of the base material and the fuel oil composition were determined by the following methods. (1) Density Measured according to JIS K2249. (2) Reed vapor pressure (RVP) Measured according to JIS K2258. (3) Research method octane number (RON) Measured according to JIS K2280. (4) Motor method octane number (MON) Measured according to JIS K2280.

(5) Component composition Measured by gas chromatography according to the Japan Petroleum Institute method JPI-5S-33-90. (6) Distillation properties Measured according to JIS K2254. (7) Sulfur content Measured according to JIS K2541. The engine startability of the fuel oil composition was evaluated as follows. <Engine Startability> In an environment of 10 ° C. (room temperature, oil temperature, engine temperature), the engine (Mitsubishi Minica) was started, and the number of starts / evaluation times was set to 8/10 or more,
Less than 10 was regarded as defective. Examples 1 to 4 and Comparative Examples 1 to 6 A base material having the properties shown in Table 1 was mixed at a ratio shown in Table 2 to prepare a fuel oil composition, and the properties and performance were evaluated. The results are shown in Table 2.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

[Table 5]

[0022]

According to the present invention, it is possible to easily obtain a fuel oil composition for a gasoline engine with low environmental load while maintaining high driving performance.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Sadanori Sawada 1280 Kamiizumi, Sodegaura-shi, Chiba (72) Inventor Hiroshi Hirano 1280 Kamiizumi, Sodegaura-shi, Chiba

Claims (8)

[Claims] 1. A fuel oil composition for a gasoline engine having a research octane number of 96.0 or more, a Reid vapor pressure of 47 to 60 kPa, and a benzene content of 1% by volume or less. 2. A fuel oil composition for a gasoline engine having a research octane number of 96.0 or more, a Reid vapor pressure of 47 to 60 kPa, a benzene content of 1% by volume or less, and a sulfur content of 30 ppm or less. object. 3. Research method octane number is 98.0 or more, motor method octane number is 85.0 or more, Reid vapor pressure is 47 to 60 kPa, and benzene content is 1% by volume.
Hereinafter, the sulfur content is 10 ppm or less, and the distillation property is
10% distillation temperature 40 ° C or higher and lower than 60 ° C, 30% distillation temperature 60-80 ° C, 50% distillation temperature 85-105 ° C, 70%
Distillation temperature 110 ° C or higher and lower than 130 ° C, 90% distilling temperature 1
A fuel oil composition for a gasoline engine, wherein the temperature is 30 to 160 ° C. 4. Research method octane number is 98.0 or more, motor method octane number is 85.0 or more, Reid vapor pressure is 47 to 60 kPa, and benzene content is 1% by volume.
Hereinafter, the sulfur content is 10 ppm or less, and the distillation property is 10 ppm or less.
% Distillation temperature 40 ° C or higher and lower than 60 ° C, 30% distillation temperature 60
８０80 ° C., 50% distillation temperature 85-105 ° C., 70% distillation temperature 110 ° C. or more and less than 130 ° C., 90% distillation temperature 130
~ 160 ° C, and the aromatic content is 45% by volume or less,
A fuel oil composition for a gasoline engine, wherein the sum of a ten-fold value of the benzene content and the aromatic content is 50% by volume or less. 5. A debenzene-modified gasoline 4 as a base material.
The fuel oil for a gasoline engine according to any one of claims 1 to 4, comprising 5 to 65% by volume, alkylate gasoline 1 to 20% by volume, light cracked gasoline 20 to 40% by volume, and oxygen-containing base material 1% by volume or less. Composition. 6. A debenzene-reformed gasoline 5 as a base material.
The fuel oil composition for a gasoline engine according to claim 5, comprising 0 to 60% by volume, alkylated gasoline 5 to 15% by volume, light cracked gasoline 25 to 35% by volume, and oxygen-containing base material 0.5% by volume or less. 7. The debenzene-reformed gasoline has a research octane number of 100.5 or more, a Reid vapor pressure of 50 kPa or less, and a benzene content of 1.0% by volume or less.
1.5 or more, Reid vapor pressure of 40 kPa or less and benzene content of 0.5% by volume or less, and the light cracked gasoline has a research octane number of 91.0 or more, Reid vapor pressure of 95 kPa or less and a benzene content of 1. 0% by volume
The fuel oil composition for a gasoline engine according to claim 5 or 6, wherein the composition is as follows. 8. A debenzene-reformed gasoline having a research octane number of 101.5 or more and a motor octane number of 8 or more.
8.5 or more and a sulfur content of 3 ppm or less, and the alkylated gasoline has a research octane value of 92.5 or more, a motor octane value of 89.5 or more and a sulfur content of 3 p
8. The fuel oil composition for a gasoline engine according to claim 7, wherein the light cracked gasoline has a octane number of 92.0 or more, a octane number of 79.0 or more and a sulfur content of 30 ppm or less.