JP5841422B2 - C heavy oil composition and method for producing the same - Google Patents

Description

  The present invention relates to a C heavy oil composition and a method for producing the same, and more particularly to a C heavy oil composition used as a fuel for combustion equipment such as boilers, diesel equipment, gas turbines, and ships.

C heavy oil is widely used as fuel for external combustion equipment such as boilers, diesel engine equipment fuel for large ships and power generation, and gas turbine equipment fuel.
Among C heavy oils used in various applications, marine C heavy oils are sometimes loaded in other countries and the like, and engine troubles due to combustion failures often occur, which is a big problem. For this reason, the demand of C heavy oil which is excellent in ignition performance and combustion performance, and does not generate | occur | produce a combustion failure is increasing (refer nonpatent literature 1).
In order to improve the combustibility of such heavy C oil, Patent Document 1 (Japanese Patent Laid-Open No. 8-277396) discloses that heavy oil is oil-in-water type heavy with water and a specific nonionic surfactant. As an oil emulsion, a method is disclosed in which the emulsion particle size and viscosity are controlled within a specific range and further burned after preheating.
Patent Document 2 (Japanese Patent Laid-Open No. 2003-96474) discloses a method for improving combustibility by containing 50% or more of catalytically cracked light gas oil (LCO) and defining a cetane index. Yes.
However, as described above, in recent years, the quality of marine fuel oil has been remarkably lowered, and sludge generation, ignitability, and combustibility have been reduced. For this reason, combustion troubles frequently occur in large diesel engines that are installed, causing smoke, rising exhaust temperature, exhaust system contamination, abnormal wear of cylinders, rings, etc., all of which are realistic. It does not indicate a solution.

JP-A-8-277396 JP 2003-96474 A

Koji Nomura, “Science of Marine Fuel”, Naruyamado, 1994, p. 164-166

  The present invention has been made in view of such circumstances, and it is difficult to generate sludge, has excellent ignition performance and combustion performance, and stably operates combustion equipment such as external combustion equipment, diesel equipment, and gas turbine equipment. An object of the present invention is to provide a C heavy oil composition having a large capacity calorific value and a method for producing the same.

As a result of intensive studies to achieve the above object, the present inventors have found that the above problems can be solved by combining specific substrates, and have completed the present invention.
That is, the present invention is as follows.

[1] One or more selected from atmospheric distillation light oil (straight-run gas oil), atmospheric distillation residue, residual desulfurized heavy oil, vacuum distillation gas oil, vacuum distillation residue, extract oil, and catalytic cracking gas oil 99 vol% 60 vol% or more of C heavy oil base at C fuel oil based on the total amount of the composition below, and a total aromatic content of 50 vol% or more, a density at 15 ℃ is at 0.99~1.07g / cm ³ Production of C heavy oil composition having a bicyclic aromatic hydrocarbon content of 10 vol% or more and 30 vol% or less, wherein the catalytic cracking residual oil is blended in an amount of 1 vol% to 40 vol% based on the total amount of the composition Method.

[2] The kinematic viscosity at 50 ° C. of the catalytic cracking residual oil is 15 to 300 mm ² / s, the sulfur content is 2.5% by mass or less, the nitrogen content is 0.2% by mass or less, and the residual carbon content is 7% by mass or less. The method for producing a C heavy oil composition according to the above [1], wherein the calorific value is 43.0 MJ / L or more.

  [3] 10 vol% distillation temperature (T10) in the gas chromatographic distillation of the catalytic cracking residual oil is 300 to 370 ° C, 50 vol% distillation temperature (T50) is 380 to 480 ° C, 90 vol% distillation temperature (T90) is 400-600 degreeC, The manufacturing method of C heavy oil composition as described in said [1] or [2] characterized by the above-mentioned.

[4] The C heavy oil composition has a density at 15 ° C. of 0.85 to 1.05 g / cm ³ , a kinematic viscosity at 50 ° C. of 400 mm ² / s or less, a sulfur content of 3.5% by mass or less, and a nitrogen content of 1.0 mass% or less and a flash point is 70 degreeC or more, The manufacturing method of the C heavy oil composition in any one of said [1]-[3] characterized by the above-mentioned.

  By the method of the present invention, it is possible to produce a C heavy oil composition that hardly generates sludge, is excellent in ignitability and combustibility, and has a large capacity heating value. Therefore, the C heavy oil composition of the present invention is very useful as fuel for external combustion equipment fuel such as boilers, diesel engine equipment fuel for large ships and power generation, and gas turbine equipment fuel.

  Hereinafter, preferred embodiments of the present invention will be described in detail.

The present invention is one or two selected from atmospheric distillation light oil (straight-run gas oil), atmospheric distillation residue, residual oil desulfurized heavy oil, vacuum distillation gas oil, vacuum distillation residue, extract oil, and catalytic cracking gas oil more C fuel oil base at C fuel oil based on the total amount of the composition 60% by volume or more 99% by volume, and total aromatic content of 50 vol% or more, a density at 15 ℃ is in 0.99~1.07g / cm ³ A C heavy oil composition having a bicyclic aromatic hydrocarbon content of 10 vol% to 30 vol%, characterized in that a catalytic cracking residual oil is blended in an amount of 1 vol% to 40 vol% based on the total amount of the composition It is a manufacturing method.

  The lower limit of the amount of the catalytic cracking residual oil is required to be 1% by volume or more based on the total amount of C heavy oil composition, preferably 5% by volume or more, more preferably 10% by volume or more, and further 15% by volume or more. preferable. On the other hand, the upper limit of the amount of the catalytic cracking residual oil needs to be 40% by volume or less, preferably 35% by volume or less, and more preferably 30% by volume or less. When the blending ratio of the catalytic cracking residual oil is less than 1% by volume, it is not preferable because sludge is likely to be generated due to a decrease in compatibility, and when it exceeds 40% by volume, combustibility is deteriorated.

  The total aromatic content of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is required to be 50% by volume or more from the viewpoint of ensuring compatibility as a cutback material, and is 60% by volume or more. It is preferably 70% by volume or more, more preferably 80% by volume or more, and most preferably 90% by volume or more. Here, the total aromatic content means the content of the total aromatic content measured by the Petroleum Institute method JPI-5S-49-97 "Petroleum products-Hydrocarbon type test method-High performance liquid chromatograph method". .

The density at 15 ° C. of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention needs to be 0.99 g / cm ³ or more and 1.07 g / cm ³ or less, and is 1.00 g / cm ³ or more. preferably 1.06 g / cm ³ is less, even more preferably less 1.01 g / cm ³ least 1.05 g / cm ^3. Here, the density at 15 ° C. means a value obtained in accordance with JIS K 2249 “Crude oil and petroleum products—density test method and density / mass / capacity conversion table”.

  The properties other than the total aromatic content and the density at 15 ° C. of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention are not particularly limited, but preferably have the following properties.

The kinematic viscosity at 50 ° C. of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is preferably 15 mm ² / s or more and 300 mm ² / s or less. The upper limit of kinematic viscosity at 50 ° C. is more preferably 250 mm ² / s or less, more preferably 200 mm ² / s or less, and the lower limit is 30 mm ² / s or more, from the viewpoint of a good quality C heavy oil cutback material. It is preferable that it is 50 mm < ² > / s or more.

  The sulfur content (sulfur content) of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is preferably 2.5% by mass or less, and 1.5% by mass from the viewpoint of reducing sulfur compounds in the combustion exhaust gas. % Or less is more preferable, and 0.5% by mass or less is more preferable.

  The nitrogen content (nitrogen content) of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is preferably 0.2% by mass or less, and 0.1 mass from the viewpoint of reducing nitrogen compounds in the combustion exhaust gas. % Or less is more preferable, and 0.05% by mass or less is more preferable.

  The distillation property of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention has an initial boiling point (IBP) of preferably 190 ° C. or higher and 245 ° C. or lower, more preferably 200 ° C. or higher and 230 ° C. or lower, and 10% by volume distillation. The temperature (T10) is preferably 300 ° C. or higher and 370 ° C. or lower, more preferably 310 ° C. or higher and 350 ° C. or lower, and the 50% by volume distillation temperature (T50) is preferably 380 ° C. or higher and 480 ° C. or lower, more preferably 400 ° C. or higher and 450 ° C. or lower. 90 ° C., 90% by volume distillation temperature (T90) is preferably 400 ° C. or higher and 600 ° C. or lower, more preferably 420 ° C. or higher and 550 ° C. or lower, and the end point (EP) is preferably 450 ° C. or higher and 650 ° C. or lower, more preferably 500 ° C. It is not less than 600 ° C and not more than 600 ° C.

  The residual carbon content of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is preferably 7% by mass or less, more preferably 5% by mass or less from the viewpoint of reducing dust in the combustion exhaust gas, and 3% by mass. The following is more preferable.

  The volumetric calorific value of the catalytic cracking residual oil blended in the C heavy oil composition of the present invention is preferably 43.0 MJ / L or more, more preferably 43.2 MJ / L or more from the viewpoint of reducing fuel consumption, More preferably, 5 MJ / L or more, and most preferably 44.0 MJ / L or more.

The kinematic viscosity at 50 ° C. is a value obtained based on JIS K 2283 “Crude oil and petroleum products—Kinematic viscosity test method and viscosity index calculation method”, and the sulfur content is JIS K.
The sulfur content measured in accordance with “Radiation Excitation Method” of 2541 “Crude Oil and Petroleum Products—Sulfur Content Test Method” is defined as JIS K 2609 “Crude Oil and Petroleum Products—Nitrogen Content Test Method”. The nitrogen content measured in accordance with JIS K 2254 “Petroleum products—Distillation test method—Atmospheric pressure method” is measured in accordance with JIS K 2254, and the residual carbon content is defined in JIS K 2254. 2270 “Crude Oil and Petroleum Products—How to Find Residual Carbon Content” The residual calorific value is defined as JIS K 2279 “Crude Oil and Petroleum Products—Health Calorific Test Method and Calculation Method” The total calorific value (MJ / L) per unit capacity measured according to “The calorific value test method” of “

  The catalytic cracking residual oil blended in the C heavy oil composition of the present invention is a residual oil fraction obtained from a fluid catalytic cracking (FCC) apparatus which is one of heavy oil processing processes. Here, fluid catalytic cracking refers to cracking by bringing raw oil (petroleum hydrocarbon) into contact with a fluid catalytic cracking catalyst (hereinafter also referred to as “FCC catalyst”), catalytic cracking gasoline, liquefied petroleum gas, alkylation. This is a method for obtaining products such as raw materials, catalytic cracking light oil, and catalytic cracking residual oil. As a contact method of the raw material, the FCC catalyst and the additive, there are a method using a fluidized bed of the FCC catalyst, a method such as riser cracking in which both the FCC catalyst and the raw material move in the pipe, etc. The catalytic cracking residual oil obtained from the above method can be used.

  The feedstock for catalytic cracking is not particularly limited, and is an atmospheric distillation residue obtained from an atmospheric distillation device, a direct desulfurization residue obtained from a heavy oil direct desulfurization device, and a vacuum desulfurization gas oil obtained from a vacuum desulfurization device. Hydrocracking residual oil obtained from a hydrocracking apparatus can be used.

  The reaction conditions in the catalytic cracking are not particularly limited, and normal reaction conditions are employed. For example, the reaction temperature is about 480 ° C. to 650 ° C., the pressure in the reactor is about 0.1 MPa to 0.3 MPa, the mass ratio of the FCC catalyst to the raw material oil (FCC catalyst / raw material oil) is about 1 to 20, and the contact The time can be set to about 0.1 seconds to 10 seconds.

In the method for producing C heavy oil composition of the present invention, the C heavy oil base material to be blended in addition to the catalytic cracking residual oil is not particularly limited, but atmospheric distillation light oil (straight-run gas oil), atmospheric distillation residue, residual desulfurized heavy oil , Vacuum distillation gas oil, vacuum distillation residue, extract oil, catalytic cracking gas oil, and the like. In the present invention, these C heavy oil base materials can be used alone or in combination of two or more in the catalytic cracking residual oil. Here, atmospheric distillation light oil and atmospheric distillation residual oil are light oil and residual oil obtained by distilling crude oil at atmospheric pressure with an atmospheric distillation apparatus. The residual oil desulfurized heavy oil is a heavy oil obtained when a normal pressure residual oil or a vacuum residual oil is desulfurized in a residual oil desulfurization apparatus. A vacuum distillation light oil and a vacuum distillation residual oil are a light oil and a residual oil obtained by distilling a normal pressure residual oil under reduced pressure with a vacuum distillation apparatus. Extract oil is an aromatic component that is not suitable for lubricating oil among the fractions extracted from the vacuum distillation apparatus for lubricating oil raw material by solvent extraction. The catalytic cracking light oil is a light oil obtained by cracking vacuum distillation light oil, vacuum distillation residue, etc. in a fluid catalytic cracking apparatus.
In the C heavy oil composition according to the present invention, the blending ratio of the C heavy oil base is 60% by volume or more and 99% by volume or less based on the total amount of the C heavy oil composition. Preferably it is 65 volume% or more, More preferably, it is 70 volume% or more, More preferably, it is 75 volume% or more, Preferably it is 95 volume% or less, More preferably, it is 90 volume% or less, More preferably, it is 85 volume% or less .

  The C heavy oil composition according to the present invention needs to be a C heavy oil composition that satisfies the JIS class 3 heavy oil standard obtained by using the aforementioned catalytic cracking residual oil as an essential component.

By the method of the present invention, a C heavy oil composition having a bicyclic aromatic hydrocarbon content (bicyclic aromatic content) of 10% by volume to 30% by volume is produced. The lower limit of the bicyclic aromatic hydrocarbon content is preferably 10% by volume or more in order to ensure compatibility and suppress sludge formation, and the upper limit is preferably 30% by volume or less in order to ensure combustibility, and 25 volumes. % Or less, more preferably 20% by volume or less.
In the present invention, the content of the bicyclic aromatic hydrocarbon means the aromatic fraction fractionated by the Japan Petroleum Institute method JPI-5S-22-83 “composition analysis method by column chromatography of asphalt”. It means the bicyclic aromatic hydrocarbon content measured by the method JPI-5S-49-97 “Petroleum products—Hydrocarbon type test method—High performance liquid chromatograph method”.

  The properties other than the bicyclic aromatic hydrocarbon content of the C heavy oil composition according to the present invention are not particularly limited, but preferably have the following properties.

The C heavy oil composition according to the present invention has a 15 ° C. density (density at 15 ° C.) of preferably 0.85 g / cm ³ or more, more preferably 0.88 g / cm ³ or more, and 0.90 g / cm ^3. Most preferably, it is cm ³ or more. Further, it is preferably 1.05 g / cm ³ or less, more preferably 1.00 g / cm ³ or less, and most preferably 0.99 g / cm ³ or less. When the density at 15 ° C. is less than 0.85 g / cm ^3, the calorific value per capacity is small, which is not preferable. When the density is higher than 1.05 g / cm ³ , combustion failure is likely to occur.
The 70 ° C. density (density at 70 ° C.) of the C heavy oil composition according to the present invention is preferably 0.80 g / cm ³ or more, and more preferably 0.83 g / cm ³ or more. Further, it is preferably 1.00 g / cm ³ or less, more preferably 0.95 g / cm ³ or less. When the density at 70 ° C. is less than 0.80 g / cm ^3, the calorific value per capacity is small, which is not preferable. When the density is higher than 1.00 g / cm ³ , combustion failure tends to occur, which is not preferable.
In the present invention, the density means a value obtained in accordance with JIS K 2249 “Crude oil and petroleum products—Density test method and density / mass / capacity conversion table”.

The kinematic viscosity at 50 ° C. of the C heavy oil composition according to the present invention is preferably 400 mm ² / s or less, more preferably 380 mm ² / s or less, and most preferably 360 mm ² / s or less. When the kinematic viscosity at 50 ° C. is higher than 400 mm ² / s, combustion failure tends to occur.
The kinematic viscosity at 100 ° C. of the C heavy oil composition according to the present invention is preferably 50 mm ² / s or less, and more preferably 45 mm ² / s or less. When the kinematic viscosity at 100 ° C. is higher than 50 mm ² / s, combustion failure is likely to occur.
In the present invention, the kinematic viscosity means a value obtained in accordance with JIS K 2283 “Crude oil and petroleum products—Kinematic viscosity test method and viscosity index calculation method”.

The sulfur content of the C heavy oil composition according to the present invention is preferably 3.5% by mass or less, and more preferably 3.0% by mass or less. When there is more sulfur content than 3.5 mass%, there exists a possibility that the sulfur oxide discharged | emitted from an engine may increase.
In the present invention, the sulfur content means a residual carbon content measured by JIS K 2541 “Crude oil and petroleum products—sulfur content test method”.

The nitrogen content of the C heavy oil composition according to the present invention is preferably 1.0% by mass or less, and more preferably 0.5% by mass or less. When the nitrogen content is more than 1.0% by mass, there is a concern that nitrogen oxides discharged from the engine increase.
In the present invention, the nitrogen content means a residual carbon content measured by JIS K 2609 “Crude oil and petroleum products—nitrogen content test method”.

The flash point of the C heavy oil composition according to the present invention is preferably 70 ° C or higher, more preferably 72 ° C or higher, from the viewpoint of safety in handling.
In addition, the flash point as used in the field of this invention means the value measured by the pen schema lutens sealing method of JISK2265 "how to obtain flash point".

The CCAI of the C heavy oil composition according to the present invention is preferably 900 or less, and more preferably 870 or less. When CCAI is higher than 900, combustion failure is likely to occur.
In the present invention, CCAI (Calculated Carbon Aromaticity Index: based on the decision of the International Combustion Engine Conference) is an index that focuses on the relationship between aromatic content and ignitability. The viscosity is calculated by the following formula as a representative.
CCAI = D-140.7 log (log (V + 0.85))-80.6
(D: density at 15 ° C. (kg / m ³ ), V: kinematic viscosity at 50 ° C. (mm ² / s))

The residual carbon content of the C heavy oil composition according to the present invention is preferably 15% by mass or less, and more preferably 10% by mass or less. When the residual carbon content is more than 15% by mass, combustion failure is likely to occur.
In the present invention, the residual carbon content means a residual carbon content measured according to JIS K 2270 “Crude oil and petroleum products—How to obtain a residual carbon content”.

The ash content of the C heavy oil composition according to the present invention is preferably 0.10% by mass or less, and more preferably 0.05% by mass or less. When the ash content is more than 0.10% by mass, combustion trouble is likely to occur.
In the present invention, ash means a value obtained in accordance with JIS K 2272 “Crude oil and petroleum products—ash and sulfate ash test method”.

The vanadium content of the C heavy oil composition according to the present invention is preferably 100 mass ppm or less, and more preferably 80 mass ppm or less. When the content of vanadium is more than 100 mass ppm, combustion failure is likely to occur.
In the present invention, the vanadium content means a value obtained according to JPI-5S-11 “Testing method for vanadium content in heavy oil”.

The water content of the C heavy oil composition according to the present invention is preferably 0.5% by volume or less, and more preferably 0.3% by volume or less. If the water content is more than 0.5% by volume, it will precipitate as ice in the winter season, which tends to cause metal corrosion and filter clogging.
In addition, the water | moisture content said by this invention means the value measured by JISK2275 "Crude oil and petroleum products-moisture test method".

  The ignition delay of the C heavy oil composition according to the present invention measured by a fuel ignition tester is preferably 15 ms or less. In order to operate the diesel engine equipment stably, it is effective that the time until the fuel is injected into the combustion chamber and ignited is short. Therefore, the ignition delay measured by the fuel ignitability tester may be 15 ms or less. Preferably, it is 13 ms or less, more preferably 11 ms or less.

  The combustion time of the C heavy oil composition according to the present invention as measured by a fuel ignitability tester is preferably 25 ms or less. In order to stably operate the diesel engine equipment, it is effective that the flame length in the combustion chamber is short. Therefore, the combustion time measured by the fuel ignitability tester is preferably 25 ms or less, more preferably It is 22 ms or less, more preferably 20 ms or less.

In the present invention, the fuel ignitability tester is “Fuel Ignition Analyzer: FIA-100” manufactured by Fuel Tech Co., which is filled in air having a volume of 1 L, a pressure of 4.5 MPa, and a temperature of 450 ° C. About 0.1 ml of fuel heated to 120 ° C. is injected at an injection pressure of 20 MPa, and the ignition delay time and combustion time are measured from the pressure change in the combustion chamber.
In the present invention, the ignition delay is the time when the pressure in the combustion chamber rises by 0.02 MPa from the initial pressure.
In the present invention, the combustion time is a time obtained by subtracting the ignition delay time from the maximum pressure attainment time.

The 10% weight loss temperature in a nitrogen atmosphere (100 ml / min) by thermogravimetric-differential thermal analysis of C heavy oil composition according to the present invention is preferably 400 ° C. or less, and more preferably 350 ° C. or less. . If the 10% weight loss temperature in a nitrogen atmosphere by thermogravimetric-differential thermal analysis is higher than 400 ° C., combustion failure tends to occur.
In the present invention, thermogravimetric-differential thermal analysis means that the temperature of a sample is raised under a predetermined temperature condition, and the weight loss accompanying vaporization / pyrolysis, etc. and the change in heat quantity accompanying vaporization / oxidation / thermal decomposition, etc. are simultaneously measured. It is an analysis method. Specifically, about 10 mg of a sample is weighed on a platinum pan having an inner diameter of 5 mm, and set in a Thermoflex TAS300 manufactured by RIGAKU. Next, the sample is heated from room temperature to 1000 ° C. at 100 ° C./min.

  The 50% weight reduction temperature in a nitrogen atmosphere (100 ml / min) by thermogravimetric-differential thermal analysis of C heavy oil composition according to the present invention is preferably 600 ° C. or less, more preferably 550 ° C. or less. . When the 50% weight loss temperature in a nitrogen atmosphere by thermogravimetric-differential thermal analysis is higher than 600 ° C., combustion failure is likely to occur.

  The 90% weight reduction temperature in a nitrogen atmosphere (100 ml / min) by thermogravimetric-differential thermal analysis of C heavy oil composition according to the present invention is preferably 800 ° C. or less, and more preferably 750 ° C. or less. . When the 90% weight loss temperature in a nitrogen atmosphere by thermogravimetric-differential thermal analysis is higher than 800 ° C., combustion failure tends to occur.

The C heavy oil composition according to the present invention comprises a low temperature fluidity improver, a cetane number improver, an antioxidant, a stabilizer, a dispersant, a metal deactivator, a microbial disinfectant, a combustion aid, a charge as necessary. Various additives such as an inhibitor, a discriminating agent, and a coloring agent can also be contained.
As the above-mentioned additive, one synthesized according to a conventional method may be used, or a commercially available additive may be used. In addition, the additive currently marketed may have diluted the active ingredient which contributes to the effect which the additive aimed at with the appropriate solvent. When using the commercially available additive in which the active ingredient is diluted, it is preferable to add the commercially available additive so that the properties in the C heavy oil composition satisfy the above conditions. The addition amount is arbitrary, but is usually 0.5% by mass or less, preferably 0.2% by mass or less, based on the total amount of C heavy oil composition.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

[Examples and Comparative Examples]
The test fuels of Examples 1 to 4 are the catalytic cracking residue shown in Table 1, and the reduced pressure distillation residue obtained by distilling the atmospheric residue with the reduced pressure distillation apparatus under reduced pressure, and the crude oil with the atmospheric distillation apparatus. It was prepared using straight run gas oil obtained by distillation at pressure. As Comparative Examples 1 and 2, a sample with no catalytic cracking residual oil and a commercial product were prepared.

The results of evaluating these samples are shown in Table 2. In addition, the property measurement of C heavy oil composition was performed based on the above-mentioned test method and measuring method.
The measurement of dry sludge was performed in accordance with ISO 10307-1.
From Table 2, it can be seen that the C heavy oil composition according to the present invention has an ignitability and flammability equivalent to or higher than those of the marketed product, can suppress the generation of sludge, and has a large calorific value.

  The C heavy oil composition of the present invention hardly generates sludge, is excellent in ignitability and combustibility, and has a large calorific value. Therefore, the C heavy oil composition of the present invention is very useful as fuel for external combustion equipment fuel such as boilers, diesel engine equipment fuel for large ships and power generation, and gas turbine equipment fuel.

Claims (4)

One or more C heavy oils selected from atmospheric distillation light oil (straight-run gas oil), atmospheric distillation residue, residual desulfurized heavy oil, vacuum distillation gas oil, vacuum distillation residue, extract oil, and catalytic cracking gas oil The catalytic cracking residue in which the base material is 60% by volume or more and 99% by volume or less based on the total amount of C heavy oil composition, the total aromatic content is 50% by volume or more, and the density at 15 ° C. is 0.99 to 1.07 g / cm ^3. A method for producing a C heavy oil composition having a bicyclic aromatic hydrocarbon content of 10% by volume to 30% by volume, wherein the oil is blended in an amount of 1% by volume to 40% by volume based on the total amount of the composition. The catalytic cracking residual oil has a kinematic viscosity at 50 ° C. of 15 to 300 mm ² / s, a sulfur content of 2.5% by mass or less, a nitrogen content of 0.2% by mass or less, a residual carbon content of 7% by mass or less, and a capacity heat generation. The method for producing a C heavy oil composition according to claim 1, wherein the amount is 43.0 MJ / L or more.   10 vol% distillation temperature (T10) in gas chromatographic distillation of the catalytic cracking residual oil is 300 to 370 ° C, 50 vol% distillation temperature (T50) is 380 to 480 ° C, 90 vol% distillation temperature (T90). Is 400-600 degreeC, The manufacturing method of the C heavy oil composition of Claim 1 or 2 characterized by the above-mentioned. The C heavy oil composition has a density at 15 ° C. of 0.85 to 1.05 g / cm ³ , a kinematic viscosity at 50 ° C. of 400 mm ² / s or less, a sulfur content of 3.5% by mass or less, and a nitrogen content of 1.0. The method for producing a C heavy oil composition according to any one of claims 1 to 3 , wherein the mass point is not more than mass% and the flash point is not less than 70 ° C.