Method and process system for preparing gasoline and diesel oil by co-hydrogenating 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 incapable of large-scale production, difficult quality control, high hydrogen consumption of hydrogenation reaction, etc., so as to increase the efficiency of co-hydrogenation reaction, reduce the damage of equipment, The effect of low hydrogenation efficiency

Active Publication Date: 2020-12-04
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 bioma

Method used

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  • Method and process system for preparing gasoline and diesel oil by co-hydrogenating coal tar and biomass oil
  • Method and process system for preparing gasoline and diesel oil by co-hydrogenating coal tar and biomass oil
  • Method and process system for preparing gasoline and diesel oil by co-hydrogenating coal tar and biomass oil

Examples

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Effect test

Embodiment 1

[0152] Take 7.2×10 4 Take t / a (10t / h) co-hydrogenation of coal tar and biomass oil as an example, hydrogenation can produce gasoline and diesel oil. Coal tar and biomass oil are mixed into the hydrofinishing unit. The process conditions of the hydrofinishing unit are shown in Table 2 to Table 5. The oil produced by hydrofinishing is separated to obtain hydrofined diesel oil and hydrofined gasoline rich in a large amount of saturated aromatics.

[0153] In this embodiment, coal tar and biomass oil are mixed as fixed-bed hydrocracking mixed raw materials, and the hydrocracking process adopts the above-mentioned method: coal tar and biomass oil co-hydrogenate, and the steps are as follows:

[0154] a. Coal tar and biomass oil mixing step: Coal tar and biomass oil with a feed flow ratio of 5:5 are mixed uniformly under stirring conditions of 80°C to 200°C to obtain raw materials.

[0155] b. The raw material produced in the mixing tank 5 enters the fixed-bed reactor I6 through a ...

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 9MPa, and total space velocity 0.3h -1 , The volume ratio of hydrogen to oil is 1700:1, and diesel and gasoline with a saturated aromatic content of 89.196% are produced.

[0158] Compared with Example 1, after changing 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 10MPa, and total space velocity 0.35h -1 , The volume ratio of hydrogen to oil is 1500:1, and diesel and gasoline with a saturated aromatic content of 91.01% are produced.

[0161] Compared with Example 1, after changing 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 oil by mixing and hydrogenating coal tar and biomass oil, and belongs to the technical field of petrochemical engineering energy. The method comprises the steps of carrying out catalytic hydrogenation on coal tar to obtain a coal tar system subjected to hydrogenation pretreatment, mixing the coal tar system subjected to hydrogenation pretreatment with biomass oil to obtain a mixed oil system, continuously carrying out catalytic hydrogenation on the mixed oil system, and carrying out rectification treatmentto obtain a gasoline and diesel oil product, wherein the coal tar system subjected to hydrogenation pretreatment is subjected to catalytic hydrogenation to form a hydrogen-donating solvent, and hydrogen free radicals are utilized to perform hydrodeoxygenation on the biomass oil. The system disclosed by the invention is provided with a plurality of staged reactors, so that the staged catalytic hydrogenation reaction is realized, and the coal tar is subjected to hydrogenation pretreatment and then is mixed with the biomass oil for catalytic hydrogenation. Compared with a single raw material hydrogenation technology, the hydrogenation speed is high, the coking influence is small, and the raw material adaptability is also improved.

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 oil. Background technique [0002] With the rapid economic growth, coal has occupied a considerable proportion in the global energy consumption structure, and fuel oil has once become a product with long-term strong demand in the global market. However, the traditional coal chemical production mode has not been well improved. As a raw material for fuel oil, the utilization rate of coal tar is not high enough to cause problems such as declining profits and aggravating environmental pollution. To continue advancing modern industry, fossil energy remains an irreplaceable source of power. However, due to the increasing demand for liquid fuels in the society, the production of coal tar can no longer be fully met. On the other hand, due to the continu...

Claims

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Application Information

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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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