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Method for pretreating heavy oil based on self-assembling effect of heavy aromatics in subcritical/supercritical water and application

A technology for supercritical water and heavy oil, which is applied in the treatment of hydrocarbon oil, petroleum industry, catalytic reforming of naphtha, etc., and can solve problems such as loss of light distillate

Active Publication Date: 2017-01-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because partial oxidation has no specific selectivity for hydrocarbons, the desulfurization process results in a loss of light ends

Method used

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  • Method for pretreating heavy oil based on self-assembling effect of heavy aromatics in subcritical/supercritical water and application
  • Method for pretreating heavy oil based on self-assembling effect of heavy aromatics in subcritical/supercritical water and application
  • Method for pretreating heavy oil based on self-assembling effect of heavy aromatics in subcritical/supercritical water and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] For the pretreatment under the supercritical water environment, 7.5g of raw oil (properties are shown in Table 1) and 30g of water are added in a high-pressure reactor with a capacity of 100ml. With high purity N 2 After purging for 10 minutes, the closed reactor was heated from room temperature at a rate of 15 K / min, and the stirring rate was kept at 700 rpm during the process. After reaching the designated reaction temperature of 375°C, keep it for 10-120 minutes. Then the reactor was cooled by air to terminate the reaction.

[0066] for N 2 In the comparative pretreatment experiment under ambient conditions, 30 g of raw material oil was added to a high-pressure reactor with a capacity of 100 ml. After high-purity N 2 Filled with 8.0-9.0MPa high-purity N after purging 2 . The closed reactor was heated at a rate of 15K / min from normal temperature, and the stirring rate was kept at 700rpm during the process. After reaching the reaction temperature, maintain a cer...

Embodiment 2

[0074] Add 8.3g raw material oil (property as shown in Table 2) and 25g water in the high-pressure reactor that capacity is 100ml. With high purity N 2 After purging for 10 minutes, the closed reactor was heated from room temperature at a rate of 15 K / min, and the stirring rate was kept at 700 rpm during the process. After reaching the designated reaction temperature of 390°C, keep it for 90 minutes. Then the reactor was cooled by air to terminate the reaction. In order to keep the experimental error of product distribution below 5%, all reaction processes were repeated more than three times.

[0075] Table 2 Properties of raw material heavy oil

[0076]

[0077] After the pretreatment in the SCW environment, the analysis results of the cracked liquid phase products are shown in Table 3.

[0078] Table 3 Properties of liquid phase reaction products after SCW environmental pretreatment

[0079]

Embodiment 3

[0081] Add 6.7g raw material oil (property as shown in Table 4) and 40g water in the high-pressure reactor that capacity is 100ml. With high purity N 2 After purging for 10 minutes, the closed reactor was heated from room temperature at a rate of 15 K / min, and the stirring rate was kept at 700 rpm during the process. After reaching the designated reaction temperature of 360°C, keep it for 60 minutes. Then the reactor was cooled by air to terminate the reaction. In order to keep the experimental error of product distribution below 5%, all reaction processes were repeated more than three times.

[0082] Table 4 Properties of raw material heavy oil

[0083]

[0084] After the pretreatment in the subcritical water environment, the analysis results of the cracked liquid phase products are shown in Table 5.

[0085] Table 5 Properties of liquid phase reaction products after sub-CW environmental pretreatment

[0086]

[0087] The method of heavy oil pretreatment and upgrad...

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Abstract

The invention relates to a method for pretreating heavy oil based on a self-assembling effect of heavy aromatics in subcritical / supercritical water and application. The method comprises the following steps: placing the heavy oil in a subcritical / supercritical water environment in a specific thermodynamic state, and enabling cracking reaction of the heavy oil to be transferred into a subcritical / supercritical water phase from an oil phase; and preferably forming similar coke gathered supermolecular structure by using heteroatoms which are rich in the heavy oil and heavy components of carbon residues according to a differentiated self-assembling tendency, and removing the heavy components from a reaction system in a condensation coking mode. The method for pretreating the heavy oil based on the self-assembling effect of the heavy aromatics in the subcritical / supercritical water comprises the following steps: adding the heavy oil and water; purging with high-purity N2; heating and stirring; insulating after heating to reaction temperature; and finishing reaction. The invention further relates to application of the method. By the method provided by the invention, removal of the heteroatoms from the heavy oil and pretreatment of the carbon residues can be carried out synchronously.

Description

technical field [0001] The present invention relates to the technical field of heavy oil pretreatment, in particular to heavy oil pretreatment based on sub / supercritical water, in particular to a heavy oil pretreatment based on sub / supercritical water self-assembly effect of heavy aromatics method and application. Background technique [0002] Heavy oil contains a large amount of heteroatoms such as S, N, Ni and V and carbon residues. Due to the continuous reduction of light crude oil production worldwide, traditional petroleum processing methods (such as hydrogenation and catalytic cracking) are facing great challenges due to the increase in the proportion of heavy oil feed and the decline in quality. [0003] The ratio of Ni and V contained in heavy oil is much higher than that of other metals, and they are coupled in heavy aromatics to form stable porphyrin and other structures. The analysis of heavy oil from different sources shows that most of Ni and V are distributed...

Claims

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Application Information

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IPC IPC(8): C10G35/06
CPCC10G35/06C10G2300/202
Inventor 袁佩青袁渭康刘庆坤王凯陈益
Owner EAST CHINA UNIV OF SCI & TECH
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