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Method for producing diesel oil and bunker fuel blend component from coal tar

A technology for coal tar and fuel oil, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of low added value, environmental pollution, waste of resources, etc., to reduce hydrogen consumption, reduce investment, and improve operation. The effect of smoothness

Active Publication Date: 2014-04-02
GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

So far, the national coal tar production has exceeded 15 million tons per year, but the actual deep processing of coal tar is less than 8 million tons per year, which is a serious waste of resources
[0004] At present, most domestic enterprises sell coal tar directly, which not only has low added value, but also causes great pollution to the environment.

Method used

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  • Method for producing diesel oil and bunker fuel blend component from coal tar
  • Method for producing diesel oil and bunker fuel blend component from coal tar

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The slurry bed hydrogenation catalyst added in the slurry bed reactor in this example is a Co-Mo type hydrogenation catalyst, and the fixed bed hydrofinishing catalyst in the fixed bed hydrofinishing reactor is a Ni-W type hydrogenation catalyst , the hydrocracking catalyst in the hydrocracking reactor is a Ni-W type hydrogenation catalyst, and the physical and chemical properties of the three catalysts are as follows in Table 1:

[0029] Table 1 Physicochemical properties of catalysts

[0030] Slurry bed hydrogenation catalyst Fixed bed hydrotreating catalyst Hydrocracking catalyst Specific surface area, m 2 / g 287 120 152 Pore ​​volume, mL / g 0.85 0.37 0.39 Possible pore size, nm 11.8 7.2 7.0 carrier γ-Al 2 o 3 γ-Al 2 o 3 γ-Al 2 o 3 Cobalt oxide, % 4.7 / / Molybdenum oxide, % 15.2 / / Nickel oxide,% / 4.2 3.9 Tungsten oxide, % / 27.4 25.6

[0031] Coal tar property is as f...

Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is that the slurry bed reactor is subjected to a pressure-lifting operation, and the feed amount of raw materials and the amount of ship fuel oil extracted are the same as those of Embodiment 1. The hydrocracking liquid product is distilled in a distillation pot to obtain naphtha fraction and diesel fraction.

[0044] The operating conditions of the slurry bed reactor in this embodiment are: the average reaction temperature is 230°C, the hydrogen partial pressure is 15.0MPa, and the space velocity is 0.5h -1 , The volume ratio of hydrogen to oil is 1500.

[0045] The operating conditions of the fixed bed hydrofining reactor are: the average reaction temperature is 380°C, the hydrogen partial pressure is 15.0MPa, and the space velocity is 0.5h -1 , The volume ratio of hydrogen to oil is 1500.

[0046] The operating conditions of the fixed bed hydrocracking reactor are: the average reaction temperature is 355°C, th...

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Abstract

The invention discloses a method for producing diesel oil and bunker fuel blend component from coal tar, and solves the problems that existing fuel oil causes serious environment pollution and is low in utilization rate. The method comprises the following steps: (1) after mixing full-range coal tar fraction with hydrogen, performing pre-hydrogenation reaction in a slurry bed reactor; (2) performing gas-liquid separation and fractionation on a pre-hydrogenation reaction product, and fractionating a liquid product into a light component and a heavy component, wherein a part of the heavy component is discharged out of a device as bunker fuel, and after the rest heavy component is mixed with the light component, a mixture enters a fixed-bed hydrofining reactor for reaction; (3) enabling effluent from the hydrofining reactor to enter a hydrocracking reactor for hydrocracking reaction; and (4) performing gas-liquid separation and fractionation on effluent from the hydrocracking reactor to obtain naphtha and diesel oil. Due to the adoption of the method, hot spots of a conventional fixed bed caused by strong heat release in coal tar hydrodeoxygenation and olefin saturation steps can be reduced and the operating stability of a coal tar hydrogenating device can be improved.

Description

technical field [0001] The invention relates to a method for producing diesel from coal tar and producing marine fuel oil blending components. Background technique [0002] Coal tar is an organic mixture dominated by aromatic hydrocarbons, which can be processed into various chemicals and high-quality fuel oil. Coal tar is an important by-product of coking industry and coal gasification industry. With the continuous development of my country's economic construction, especially the continuous and in-depth development of the iron and steel industry, the coking industry has also developed rapidly. Now my country has developed into the world's largest producer of coke and coal tar. So far, the national coal tar production has exceeded 15 million tons per year, but the actual deep processing of coal tar is less than 8 million tons per year, which is a serious waste of resources. With the development of coal coking industry, the output of coal tar is increasing, so the clean pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 吴建明
Owner GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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