JP4803790B2 - Clean gasoline composition - Google Patents

Description

  The present invention relates to a gasoline composition that ensures environmental performance while ensuring sufficient operating characteristics.

  In recent years, as the scale of industrial economic activity expands globally, environmental destruction at the global level has become an important issue, and countermeasures for this have begun to be studied worldwide. Above all, the global warming problem is concerned not only for human beings but also the earth itself, and it is necessary to respond to the prevention of the release of carbon dioxide, which is the main cause of global warming, to the atmosphere. There is a strong demand for the establishment of measures. The Kyoto Protocol entered into force in February 2005, and Japan is obliged to reduce it by 6% compared to the 1990 level.

  Considering the aspect of automobile fuel, the demand for high-performance gasoline having high driving performance is increasing as the performance of automobiles increases. In particular, a report with a higher research octane number (RON) improves the driving performance of automobiles, improves energy conversion efficiency, and reduces carbon dioxide emissions, which is considered one of the global warming gases. There is. On the other hand, environmental pollution due to automobile fuel itself and its combustion exhaust gas has become a social problem, and automobile fuel that maintains high driving performance and has a low environmental impact is desired. In particular, from the viewpoint of exhaust gas purification, further reduction of the sulfur content is also desired. Further, gasoline for automobile fuel is almost composed of carbon and hydrogen, and when they are burned, carbon and hydrogen are converted into carbon dioxide and water, respectively, and at the same time, the generated heat is the power. Therefore, when the hydrocarbon compound burns, the lower the ratio of carbon contained in the fuel, the less carbon dioxide that is generated. Therefore, gasoline with a greater amount of hydrogen relative to carbon can suppress the global warming effect. It can be said that. In particular, the calorific value generated during combustion correlates with fuel efficiency, which is an indicator of the mileage of automobiles, and the amount of carbon dioxide generated per calorific value will be an important measure for environmental conservation on a global scale in the future. Become.

  JIS K 2202 stipulates No. 1 automobile gasoline with an octane number of 96.0 or more and No. 2 automobile gasoline with 89.0 or more. The former is marketed as high-performance premium gasoline and the latter as regular gasoline. Yes. Conventionally, premium gasoline is mainly based on base materials having an octane number of 100 or more, such as catalytic reformed gasoline base materials, alkylate gasoline base materials, base materials having an octane number of 93 or higher, such as a light portion of catalytic cracked gasoline, Manufactured by blending various base materials. On the other hand, regular gasoline is produced by blending low-octane desulfurized straight-run naphtha, aroma fraction, and the like with a catalytic cracking gasoline base material as the center.

In general, cracked naphtha fractions such as catalytically cracked gasoline and various cracked gasolines contain olefins and aroma, greatly contributing to the improvement of octane number. On the other hand, paraffins having a relatively low octane number are not preferred as a gasoline base material and have been reduced.
On the other hand, aroma compounds and olefin compounds widely used as compounds having a high octane number are unlikely to be used in the future in terms of the environment. Specifically, it is said that aroma compounds are carcinogenic and have problems with the PRTR method, and that when used as a fuel for automobiles, some of them are changed to particulate compounds (PM). Is photochemically unstable and has a problem in storage stability, so that it has been pointed out that a solid compound such as sludge is precipitated.

  Furthermore, although the aroma compound has an advantage of a high octane number, it has a high boiling point and cannot be contained so much in the gasoline base material from the viewpoint of distillation properties. In addition, as for the olefin component, the component having relatively low molecular weight tends to have a high vapor pressure although it has a high octane number, and it cannot be used in many gasoline base materials. There is a tendency to require a light distillation property, that is, a property having a relatively low boiling point and a low Reed vapor pressure (RVP).

  Taking the above situation into consideration and looking at the actual situation of gasoline production, cracked gasoline base materials produced by cracking heavy petroleum fractions are more economical to manufacture than other gasoline base materials. While it has the advantage of being able to do so, it contains a lot of sulfur. As a result, most of the sulfur content in the gasoline produced as described above is derived from the cracked gasoline base material. The sulfur content contained in the cracked gasoline base material can be easily reduced using a known technique of hydrotreating in the presence of high-pressure hydrogen and a catalyst. However, in that case, a large amount of the catalytic cracking gasoline base material is contained, and the olefin component having a high octane number is hydrogenated to lower the octane number of the base material. There was a problem that it was difficult to obtain gasoline. Recently, a technique for suppressing hydrogenation of the olefin and suppressing a decrease in octane number has been developed (see Patent Document 1), but the above-described problem that the olefin has an adverse effect on the environment has not been solved. In addition, development of paraffinic gasoline with a sulfur content reduced to 50 ppm by mass has been reported (see Patent Document 2), but it is necessary to reduce it to 10 ppm by mass considering future sulfur-free, At this sulfur level, there was no method for producing paraffinic gasoline having appropriate distillation properties and vapor pressure and having a high octane number.

  On the other hand, a technique is known that can improve the octane number, which is important as a gasoline base material, by skeletal isomerization of hydrocarbon oil under specific conditions. Isoparaffins produced by the skeletal isomerization reaction are effective as environmentally friendly clean fuels because they have little adverse effects on the environment such as aroma compounds and olefin compounds. Specifically, the skeletal isomerization reaction is generally a method of converting linear paraffin having a low octane number into a branched paraffin having a high octane number. In addition to a naphtha fraction derived from crude oil as its feedstock, FT (Fischer Tropsch) wax obtained by GTL (Gas To Liquid) technology using hydrogen or carbon monoxide generated from biomass, natural gas, steelworks, etc. as a raw material can be used.

  GTL oil is a reaction that mainly synthesizes straight-chain saturated hydrocarbons, and there have been many studies of application to lubricating oil, light oil, and kerosene (see Patent Document 3), but the technology applied to gasoline is There wasn't. As described above, the octane number is an important indicator as the property of gasoline, but GTL oil with a high amount of linear paraffin is used to produce a high octane number gasoline, that is, a gasoline with less linear paraffin and increased branched paraffin. This is considered to be difficult (see Patent Document 4). In other words, it is extremely difficult to satisfy a compound with a high ratio of hydrogen to carbon in hydrocarbons (paraffins), a high octane number, and proper distillation properties, vapor pressure, and many other indicators as gasoline. . Although it may be applicable to gasoline bases by isomerizing paraffins on straight chains, proper effects cannot be obtained unless appropriate catalysts and processes are used, and blend bases are ultimately appropriate. Unless you make the right combination, it is very difficult to get a satisfactory gasoline product.

As in the isomerization reaction, there is an alkylation reaction as a process capable of selectively producing isoparaffin. The alkylation reaction is a reaction in which an acid catalyst such as sulfuric acid is used to react mainly with a compound having 4 carbon atoms to produce an isoparaffin having 8 carbon atoms, and many apparatuses are already operating all over the world. (Refer nonpatent literature 1). However, because of the characteristics of the reaction, the product is mainly an isoparaffin having 8 carbon atoms, so that a multibranched isoparaffin having 8 carbon atoms can be obtained, but a multibranched isoparaffin having less than 8 carbon atoms is obtained. That was difficult. Since alkylate gasoline is composed of high-boiling components, it has been difficult to produce in large quantities in the past because of restrictions on distillation properties and because relatively expensive compounds with 4 carbon atoms are used as raw materials. .
Due to the circumstances as described above, the carbon dioxide per calorific value necessary for ensuring a sufficient practical performance and effectively suppressing the emission of carbon dioxide, while the sulfur content is still as low as 10 ppm by mass or less. No gasoline composition having a generation amount of 0.285 g / kcal or less has been proposed, and a production method thereof has not been established.
JP 2003-183676 A International Publication No. 2002/046334 JP-T-2004-500977 Special table 2003-524679 gazette Edited by Petroleum Society, “Petroleum Refining Process”, p209 ～ 216, Kodansha Scientific, 1998

  The present invention has been made to solve the above problems, and the object of the present invention is to significantly reduce the load on the environment by reducing the amount of sulfur dioxide and carbon dioxide generated during combustion while ensuring sufficient operating characteristics. It is to provide a reduced gasoline composition.

The gasoline composition of the present invention has a research octane number of 92 or more, a sulfur content of 10 mass ppm or less, a silver plate corrosion of 1 or less, a vapor pressure at 37.8 ° C. of 72 kPa or less, and a distillation property of 50% by volume distillation temperature. Hydrocracking of wax obtained by the Fischer-Tropsch method with a temperature of 100 ° C or less, a carbon dioxide generation rate of 0.2685 g / kcal or less , a carbon dioxide emission rate of 2.14 kg / L or less per volume Or it consists of containing GTL gasoline (henceforth "GTL gasoline") obtained by an isomerization process .
The gasoline composition of the present invention preferably has a hydrogen / carbon ratio of 2.29 mol / mol or more.
The gasoline composition of the present invention preferably has a sulfur content of 1 mass ppm or less, and further has a vapor pressure at 37.8 ° C. of 65 kPa or less, an olefin content of 5% by volume or less, and an aroma content of 5 volumes. % Or less is preferred.
Further, the gasoline composition of the present invention preferably contains an oxygen-containing compound and / or isomerized gasoline.
Furthermore, the present invention is particularly preferably used as a gasoline engine fuel or a fuel cell fuel.

  The fuel composition of the present invention can ensure sufficient driving characteristics, particularly high fuel efficiency, and greatly reduce the amount of sulfur oxides discharged to the environment, carbon dioxide and hydrocarbons, thereby reducing the burden on the environment. There is a special effect that you can.

  The gasoline composition of the present invention has a research octane number (RON) of 92 or more from the viewpoint of effectively improving fuel efficiency, preferably 92 to 96, more preferably 94 to 96, and 95 to 96. Those are particularly preferred. This RON is measured by a method defined in JIS K 2280.

The sulfur content is preferably as low as possible from the viewpoint of reducing environmental burden, and is 10 mass ppm or less, preferably 5 mass ppm or less, more preferably 1 mass ppm or less, but considering the desulfurization cost It is preferable to set it to 0.1 mass ppm or more. This sulfur content is measured by the method defined in JIS K2541.
In addition, in order to prevent the trouble of the fuel center gauge of the vehicle due to a small amount of active sulfur, the silver plate corrosion is preferably 1 or less and 0. This silver plate corrosion is measured by the method prescribed in British Petroleum Institute Standard IP-227.

  The vapor pressure is set to 72 kPa or less, preferably 65 kPa or less as a vapor pressure of 37.8 ° C. from the viewpoint of preventing deficiencies in operability due to low-temperature startability, vapor lock, and the like. Furthermore, it is preferable to set it as 44-60 kPa. This vapor pressure is measured by a method defined in JIS K 2258.

  The distillation volume of 50% by volume distillation temperature is preferably 100 ° C. or less, more preferably 80 to 95 ° C., from the viewpoint of reducing exhaust gas and improving acceleration. The 50 vol% distillation temperature of this distillation property is measured by the method specified in JIS K 2254.

In the fuel composition of the present invention, in particular, the amount of carbon dioxide generated per calorific value is set to 0.285 g / kcal or less. When used in this way, the amount of carbon dioxide emitted Can be reduced. The amount of carbon dioxide generated per calorific value is measured by calorific value (kcal / g) of gasoline measured by the calorific value test method of JIS K 2279 and the estimation method by calculation and ASTM D5291-96 (hydrocarbon combustion method). It is calculated from the carbon concentration (g / g) in gasoline that is completely burned and converted into carbon dioxide.
In order to easily reduce the amount of carbon dioxide generated per calorific value, GTL gasoline is included. This GTL gasoline is a gasoline obtained by hydrocracking or isomerizing a wax obtained by the Fischer-Tropsch method (hereinafter referred to as “FT wax”). The Fischer-Tropsch method is a method of mainly synthesizing normal paraffin or the like by reacting carbon monoxide and hydrogen using a Fischer-Tropsch catalyst.

  Since the FT wax has a low RON as it is, it is used after hydrocracking or isomerization. This hydrocracking and isomerization treatment can be carried out using ordinary equipment, catalysts, conditions and the like used in petroleum refining. The GTL gasoline obtained by such a method contains a lot of isoparaffins with a large number of branches, a high RON, and a high hydrogen ratio to the number of carbons contained in the molecule, and the amount of carbon dioxide generated during combustion. Can be suppressed. This GTL-based gasoline has a RON of 92 or more and a carbon dioxide generation amount per calorific value of 0.2685 g / kcal or less, so that a gasoline composition can be easily prepared. 10 to 100% by volume is preferable.

  In the gasoline composition of the present invention, in order to more easily achieve a carbon dioxide generation amount per calorific value of 0.28585 g / kcal or less, a carbon dioxide emission amount per volume, preferably 2.14 kg / L. Hereinafter, it is more preferably 2.0 to 2.1 kg / L. This carbon dioxide emission per volume is calculated from the carbon concentration in gasoline as measured by ASTM D5291-96 (hydrocarbon combustion method), assuming that the entire amount is converted to carbon dioxide by complete combustion. is there.

  For the same reason, the hydrogen / carbon ratio is preferably 2.29 mol / mol or more, more preferably 2.30 to 2.40 mol / mol. This hydrogen / carbon ratio is calculated from the contents of carbon and hydrogen measured by ASTM D5291-96 (hydrocarbon combustion method).

  Furthermore, for the same reason, the olefin content is preferably 5% by volume or less, more preferably 1% by volume or less, and the aromatic content is preferably 5% by volume or less, more preferably 1% by volume or less. The olefin content and aromatic content are measured by a method defined in JIS K 2536 (fluorescent indicator adsorption method).

  When the gasoline composition of the present invention contains an oxygen-containing compound and / or isomerized gasoline, the RON may be adjusted to 92 or more, or the carbon dioxide generation amount per calorific value may be adjusted to 0.28585 g / kcal or less. It can be simplified.

  As the oxygen-containing compound, for example, alcohols having 2 to 5 carbon atoms and ethers having 4 to 8 carbon atoms are suitable. Specifically, alcohols such as methanol, ethanol, propyl alcohol, and the like are used. Derivatives of ethers and esters such as ethyl isopropyl ether, ethyl tertiary butyl ether (ETBE), ethyl secondary butyl ether (ESBE), diisopropyl ether, tertiary amyl ethyl ether (TAEE), ethyl acetate, ethyl propionate Etc. These oxygenated compounds are used in an amount of 1 to 15% by volume, preferably 3 to 12% by volume, more preferably 5 to 10% by volume, based on the total gasoline composition. If the amount is too small, the effect of addition is small. If the amount is too large, impurities such as moisture are accompanied, which may cause troubles such as corrosion of pipes and sealing materials. For example, since ethanol dissolves water indefinitely, if it is contained too much in the fuel, water may be concentrated and accumulated in the automobile engine, which may have an adverse effect. Furthermore, when there are many oxygenated compounds in the fuel oil, for example, if the amount exceeds 15% by volume, it will deviate from the optimum value of the air / fuel ratio of the existing engine. There is a drawback that the amount of nitrogen oxide (NOx) increases. Further, since oxygen-containing compounds generally have a lower calorific value than other gasoline base materials and may reduce fuel consumption, it is not preferable to use too much.

Isomerized gasoline is obtained by isomerizing a desulfurized straight naphtha fraction. In addition, since isomerized gasoline is obtained by isomerization treatment of the above-mentioned GTL gasoline, GTL gasoline is also included in isomerized gasoline in a broad sense, but in the present invention, it means in a narrow sense not including GTL gasoline. Is isomerized gasoline.
The isomerization method is not particularly limited, but “Platinum Chlorinated Alumina” in which platinum is supported on chlorinated alumina and “Platinum Zeolite” in which platinum is supported on zeolite are conventionally used as catalysts under hydrogen atmosphere. Other solid acids such as "platinum sulfate zirconia" with platinum supported on a carrier containing zirconia and sulfuric acid, and "platinum tungstate zirconia" with platinum supported on a carrier containing an oxide component of zirconia and tungsten. A catalyst is preferably used.
The isomerization reaction conditions vary depending on the catalyst used, but the reaction temperature is 120 to 250 ° C., the reaction pressure is 0.5 to 5 MPa, and the liquid space velocity (LHSV) is 0.5 to 5 h ⁻¹ . A part of the ring is opened, and at the same time, normal paraffin is isomerized to increase isoparaffin. As a particularly preferred isomerization method, a platinum tungstate zirconia catalyst is used, the reaction temperature is 180 to 220 ° C., the reaction pressure is 0.5 to 3.5 MPa, and the LHSV is 1.5 to 3 h ⁻¹ . It is preferable to increase the yield by using a method in which a heavy component, a non-reacted component, a low octane value, etc. of the reaction product oil are recycled and reacted again.

The gasoline composition according to the present invention includes catalytic cracking gasoline fraction, desulfurization catalytic cracking gasoline fraction, and catalytic reformed gasoline widely used as ordinary gasoline base materials in addition to GTL gasoline, oxygenated compounds, and isomerized gasoline. It can be prepared by appropriately blending a fraction, alkylate gasoline, desulfurized straight-run gasoline fraction and the like. In preparing this gasoline composition, RON, sulfur content, vapor pressure, distillation properties, silver plate corrosion, carbon dioxide generation amount per calorific value, etc. of the above various gasoline base materials are measured or calculated in advance. It can manufacture comparatively easily by mix | blending various base materials so that it may become the said specific range.
Preferred blending amounts are 10 to 90% by volume of GTL gasoline, 0 to 90% by volume of isomerized gasoline, 0 to 50% by volume of desulfurized catalytic cracking gasoline fraction, and 0 to 20% by volume of catalytic reformed gasoline fraction. 0 to 80% by volume of alkylate gasoline and 0 to 15% by volume of ETBE.

  As a preferable embodiment of the carbon dioxide low emission gasoline composition of the present invention, a known fuel additive can be blended if necessary. Although these compounding quantities can be selected suitably, it is usually preferable to set it as 0.1 mass% or less as a total amount of an additive. Examples of additives that can be used in the carbon dioxide low emission gasoline composition of the present invention include amine-based, phenol-based, aminophenol-based antioxidants, Schiff-type compounds, thioamide-type compounds, and other metal deactivators. , Surface ignition inhibitors such as organophosphorus compounds, detergent dispersants such as succinimides, polyalkylamines and polyetheramines, anti-icing agents such as polyhydric alcohols and their ethers, alkali metal salts and alkaline earths of organic acids Metal salts, auxiliary agents such as sulfates of higher alcohols, anionic surfactants, cationic surfactants, antistatic agents such as amphoteric surfactants, rust inhibitors such as alkenyl succinates, quinizarin, coumarins, etc. And a colorant such as an azo dye.

  Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to these examples.

  The gasoline base materials having the properties shown in Table 1 were blended at the blending ratios shown in Table 2 to prepare gasoline compositions serving as examples and comparative examples. The gasoline base used was prepared as follows.

Desulfurized straight-run gasoline fraction (DSLG)
It was obtained by hydrodesulfurizing a naphtha fraction of Middle Eastern crude oil and distilling off the light fraction.

Alkylate gasoline (ALKG)
A fraction containing butylene as a main component and a fraction containing isobutane as a main component were reacted with a sulfuric acid catalyst to obtain a hydrocarbon having a high isoparaffin content.

Catalytic reforming gasoline fraction (AC9)
Desulfurized heavy naphtha is reacted with a solid reforming catalyst using a moving bed reactor to reform to a hydrocarbon with a high aroma content to obtain reformed gasoline. The reformed gasoline can be used as it is, but here, a fraction (AC9) containing 80% or more of hydrocarbons having 9 carbon atoms was obtained by distillation separation.

Desulfurization catalytic cracking naphtha fraction (FCCG)
Hydrocarbons with high olefin content were obtained by cracking desulfurized light oil or desulfurized heavy oil with a solid catalyst using a fluidized bed reactor. Furthermore, hydrocarbons having a low sulfur content were obtained by collecting and removing FCCG. After sulfiding a catalyst with 20% by mass of nickel supported on alumina, a vacuum gas oil of Middle Eastern crude oil under the conditions of a reaction temperature of 250 ° C., a reaction pressure of normal pressure, an LHSV4h ⁻¹ , an H ₂ / oil ratio of 340 NL / L Diene reduction treatment was carried out by passing through a catalytic cracked naphtha fraction obtained by fluid catalytic cracking using a hydrorefined fraction as the main feedstock. Then, the reduction process of the copper- zinc aluminum complex oxide (copper content 35 mass%, zinc content 35 mass%, aluminum content 5 mass%) prepared by the coprecipitation method was performed. The diene-treated catalytically cracked gasoline was then sorbed for 20 hours under the conditions of a reaction temperature of 100 ° C., a reaction pressure of normal pressure, LHSV of 2.0 h ⁻¹ , and an H ₂ / oil ratio of 0.06 NL / L. A desulfurized catalytic cracking naphtha fraction (FCCG) desulfurized with a functional desulfurizing agent was obtained.

Isomerized gasoline (ISO)
The desulfurized straight naphtha fraction (DSLG) was obtained by reacting with a solid acid catalyst in the presence of hydrogen. As the catalyst, a catalyst in which 0.5% by mass of platinum was supported on zirconia sulfate was used after reduction treatment. The proportion of zirconia in the catalyst was 43.5% by mass as zirconium element, the proportion of alumina was 16.1% by mass as aluminum element, and the proportion of sulfur was 2.9% by mass as element. The reaction was carried out under the conditions of a reaction temperature of 200 ° C., a hydrogen pressure of 1.0 MPa, LHSV of 1.5 h ⁻¹ , and an H ₂ / oil ratio of 5.0 mol / mol to obtain isomerized gasoline (ISO).

GTL-based gasoline FT wax was used as a raw material oil, and a commercially available hydrocracking catalyst (ART HOP-302) was used as the catalyst, and the reaction was carried out under the following conditions. The FT wax has a density of 0.817 g / cm ³ , a carbon number of 18 to 54, a 50 volume% distillation temperature of 474 ° C., a reaction temperature of 390 ° C., a reaction pressure of 4.0 MPa, LHSV of 1.0 h ⁻¹ , H ₂ / oil. FT wax decomposition oil was obtained under the condition of a ratio of 660 NL / L. The obtained FT wax cracked oil was separated into a light component having a boiling point of 20 to 70 ° C. and a heavy component having a boiling point of 70 to 130 ° C., and subjected to isomerization treatment under the following reaction conditions.
As the isomerization catalyst for the light component, the isomerization catalyst used in the production of the isomerized gasoline was used. The reaction was performed under the conditions of a reaction temperature of 200 ° C., a reaction pressure of 2.0 MPa, LHSV of 2.0 h ⁻¹ , and an H ₂ / oil ratio of 2.0 mol / mol.
On the other hand, as the isomerization catalyst for the heavy component, a catalyst in which 2.0% by mass of platinum is supported on zirconia tungstate, a reaction temperature of 200 ° C., a reaction pressure of 1.0 MPa, LHSV of 1.5 h ⁻¹ , H ₂ / It was performed under the condition of an oil ratio of 5.0 mol / mol. The proportion of zirconia in the catalyst was 39.4% by mass as the zirconium element, the proportion of alumina was 13.4% by mass as the aluminum element, and the proportion of tungsten was 13.8% by mass as the element.
A light isomerized oil and a heavy isomerized oil obtained by the above isomerization were blended at 76/23 (volume ratio) to obtain a GTL gasoline.

Ethyl tertiary butyl ether (ETBE)
Commercially available ethyl tertiary butyl ether was used. This is obtained from the reaction of ethanol and isobutylene.

In addition, the property of the gasoline base material and the prepared gasoline composition was measured by the following method.
The density was measured by the density test method of JIS K 2249, the vapor pressure of the Reed method was measured by the vapor pressure test method of JIS K 2258 (Reed method), and the distillation property was measured by the atmospheric pressure distillation test method of JIS K 2254. The sulfur content was measured by the sulfur content test method of JIS K2541. The total calorific value was measured by a calorific value test method of JIS K 2279 and a calculation estimation method. The total calorific value (Hg: higher calorific value) and the true calorific value (Hn: lower calorific value) can be converted by the following equation according to JIS K 2279.
Hn = Hg-6 (9h + W)
Where Hn: True calorific value (cal / g)
Hg: Total calorific value (cal / g)
h: Hydrogen content (mass%)
W: Moisture (% by mass)

About the Example, the gasoline base material was blended by the mixing ratio of Table 2, and the environmentally friendly gasoline was manufactured. The gasoline of Example 1 has a high RON and preferable distillation properties as compared with the conventional gasoline of Comparative Example 1 and the gasoline not using the GTL gasoline of Comparative Example 2, and the carbon dioxide per fuel is preferred. It can be seen that the emission amount is small and the carbon dioxide generation amount per calorific value is reduced. Specifically, the amount of carbon dioxide generated is reduced by 12.2% (converted to the weight of carbon dioxide per liter of gasoline), and the amount of carbon dioxide generated per calorific value is reduced by 6.0% (the amount of carbon dioxide generated per 1kcal during gasoline combustion). Carbon weight conversion value). That is, the gasoline of Example 1 has a high octane number, appropriate distillation properties, and vapor pressure despite a small amount of carbon dioxide generation, and is a low carbon dioxide emission gasoline having excellent practical performance. I understand.
Moreover, the gasoline of Example 2 and Example 3 contains ETBE or isomerized gasoline, and by containing an oxygen-containing compound or isoparaffinic gasoline, the carbon dioxide emission per fuel can be reduced, Moreover, although the amount of carbon dioxide generated per calorific value is reduced, it can be seen that this is a low carbon dioxide emission gasoline having a high octane number, suitable distillation properties, and vapor pressure, and having excellent practical performance.

  As described above, the carbon dioxide low emission gasoline of the example has a high octane number even if the vapor pressure, distillation properties, and sulfur concentration are comparable, and the carbon dioxide generation amount can be reduced. It can be seen that this is a low carbon dioxide emission gasoline having excellent practical performance.

  Since the gasoline composition of the present invention has a high content of branched saturated hydrocarbon compounds, it can be used not only as a fuel for gasoline engines but also as a fuel for fuel cells. Since it has, it is suitable and can also be used as a gasoline common to a gasoline engine and a fuel cell.

Claims (6)

Research octane number is 92 or more, sulfur content is 10 mass ppm or less, silver plate corrosion is 1 or less, vapor pressure at 37.8 ° C is 72 kPa or less, distillation volume of 50 vol% distillation temperature is 100 ° C or less, per calorific value The carbon dioxide generation amount is 0.285 g / kcal or less, the carbon dioxide emission per volume is 2.14 kg / L or less , the hydrogen / carbon ratio is 2.29 mol / mol or more , and the wax obtained by the Fischer-Tropsch method. Gasoline composition characterized by containing GTL gasoline obtained by hydrocracking or isomerizing the oil. The gasoline composition according to claim 1, wherein the sulfur content is 1 mass ppm or less. 37.8 vapor pressure at ℃ is 65kPa or less, an olefin content of 5 vol% or less, gasoline composition according to any one of claims 1 to 2, wherein the aromatic content is not more than 5% by volume. The gasoline composition according to any one of claims 1 to 3 , comprising an oxygen-containing compound. The gasoline composition according to any one of claims 1 to 4 , comprising isomerized gasoline obtained by an isomerization reaction. The gasoline composition according to any one of claims 1 to 5 , which is used as a fuel for a gasoline engine or a fuel for a fuel cell.