A method and process system for preparing gasoline and diesel by co-hydrogenation of coal tar and biomass oil

A process system and biomass technology, applied in the field of coal chemical processing and utilization, can solve the problems of inability to large-scale production, high hydrogen consumption in hydrogenation reaction, low adaptability, etc., and achieve increased co-hydrogenation reaction efficiency and hydrogenation hydrogen consumption. Large, resource-saving effect

Active Publication Date: 2022-07-29
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

However, the content of oxygenated compounds in the hydrogenation raw material of biomass oil is high, and the hydrogen consumption of hydrogenation reaction is high and difficult; secondly, the sources of biomass oil are scattered, so that large-scale production is not possible; finally, the adaptability of the hydrogenation process of biomass oil to raw materials Low, the source of biomass oil is scattered and the quality is difficult to control, and continuous production cannot be achieved
[0005] Therefore, the current processing and use of coal tar has the problems of low utilization rate, few sources, and serious environmental pollution, and the biomass oils such as catering waste oil and factory waste oil produced in daily production and life cannot be rationally reused

Method used

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  • A method and process system for preparing gasoline and diesel by co-hydrogenation of coal tar and biomass oil
  • A method and process system for preparing gasoline and diesel by co-hydrogenation of coal tar and biomass oil
  • A method and process system for preparing gasoline and diesel by co-hydrogenation of coal tar and biomass oil

Examples

Experimental program
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Effect test

Embodiment 1

[0152] at 7.2×10 4 Take the co-hydrogenation of t / a (10t / h) coal tar and biomass oil as an example, hydrogenation to produce gasoline and diesel. Coal tar and biomass oil are mixed into the hydrorefining unit, and the process conditions of the hydrorefining unit are shown in Table 2 to Table 5. The oil produced by separation and hydrorefining obtains hydrorefining diesel oil and hydrorefining gasoline that are rich in a large amount of saturated aromatic hydrocarbons.

[0153] In the present embodiment, coal tar and biomass grease are mixed as a mixed raw material for fixed bed hydrocracking, and the above-mentioned method is adopted in the hydrocracking process: coal tar and biomass grease are co-hydrogenated, and the steps are as follows:

[0154] a. Coal tar and biomass oil slurry mixing step: the coal tar with the feed flow ratio of 5:5 and the biomass oil are mixed uniformly under the stirring condition of 80℃~200℃ to obtain the raw material.

[0155] b. The raw material...

Embodiment 1

[0157] Based on Example 1, the feed flow ratio was adjusted to 4:6, and the conditions of each reactor were changed to temperature (220, 320, 350, 350) °C, reaction pressure of 9MPa, and total space velocity of 0.3h. -1 , The volume ratio of hydrogen to oil is 1700:1, producing diesel and gasoline with saturated aromatic content of 89.196%.

[0158] Compared with Example 1, after changing the feed ratio, temperature, pressure, space velocity and hydrogen oil volume ratio, the obtained product is better than Example 1.

Embodiment 3

[0160] Based on Example 1, the feed flow ratio was adjusted to 3:7, and the conditions of each reactor were changed to temperature (240, 330, 360, 360) °C, reaction pressure of 10 MPa, and total space velocity of 0.35 h. -1 , The volume ratio of hydrogen to oil is 1500:1, producing diesel and gasoline with saturated aromatic content of 91.01%.

[0161] Compared with Example 1, after changing the feed ratio, temperature, pressure, space velocity and hydrogen oil volume ratio, the obtained product is better than Example 1.

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Abstract

The invention discloses a method and a process system for preparing gasoline and diesel by mixing coal tar and biomass oil by hydrogenation, belonging to the technical field of petrochemical energy. In the present invention, the coal tar is first subjected to catalytic hydrogenation to obtain a hydrotreated coal tar system, then the hydrotreated coal tar system is mixed with biomass oil to obtain a mixed oil system, and the mixed oil system is continuously subjected to catalytic hydrogenation Then, through rectification treatment, gasoline and diesel products are obtained; wherein, the hydrogenated coal tar system is subjected to catalytic hydrogenation to form a hydrogen-donating solvent, and hydrogen radicals are used to hydrodeoxygenate the biomass oil. The system of the present invention is provided with several staged reactors to realize staged catalytic hydrogenation reaction, and the coal tar is subjected to hydrogenation pretreatment and mixed with biomass oil for catalytic hydrogenation. Compared with the single raw material hydrogenation technology, the invention has the advantages of fast hydrogenation speed, little influence of coking, and improved raw material adaptability.

Description

technical field [0001] The invention belongs to the technical field of coal chemical processing and utilization, and relates to a method and a process system for preparing gasoline and diesel by co-hydrogenating coal tar and biomass grease. Background technique [0002] With the rapid economic growth, coal occupies a considerable proportion in the global energy consumption structure, and fuel oil has once become a product with strong long-term demand in the global market. However, the traditional coal chemical production model has not been well improved. Coal tar, as a raw material for fuel oil, has a low utilization rate, which leads to problems such as declining profits and aggravating environmental pollution. For modern industry to continue to advance, fossil energy is still an irreplaceable source of power. However, due to the increasing demand for liquid fuels in society, coal tar production cannot be fully satisfied. On the other hand, due to the continuous reduction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/04C10G2400/02
Inventor 牛梦龙田润芝范峥姬盼盼
Owner XI'AN PETROLEUM UNIVERSITY
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