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A method for stabilizing coal direct liquefied oil by hydrogenation

A technology of direct coal liquefied oil and stabilization method, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems of high investment cost and operation energy consumption, and huge hydrogenation equipment, so as to reduce investment cost and operation energy consumption, and improve effective Throughput, effect of reducing pressure level

Active Publication Date: 2017-10-17
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems that the existing hydrogenation stabilization method for direct coal liquefied oil requires a large amount of circulating hydrogen, resulting in a large hydrogenation device, high investment cost and high energy consumption in operation, and provides a hydrogenation stabilization method for direct coal liquefied oil, This method does not need to circulate hydrogen, can effectively reduce the impurity content in the direct coal liquefaction oil, and can effectively inhibit the coking of the catalyst and prolong the stable operation time of the device

Method used

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  • A method for stabilizing coal direct liquefied oil by hydrogenation
  • A method for stabilizing coal direct liquefied oil by hydrogenation
  • A method for stabilizing coal direct liquefied oil by hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The properties of the coal direct liquefied oil used in this example are listed in Table 1, and the hydrogenation catalyst used is a catalyst named HDO-2 produced by Hunan Changling Petrochemical Technology Company. This embodiment adopts Figure 5The process shown hydrotreats coal direct liquid oil. Among them, the structure of the gas-liquid mixer is as follows: Figure 4 As shown, the structure of the member used to adjoin the liquid channel and the gas channel in the gas-liquid mixer is a pipe formed by a porous material (commercially purchased from Beijing Zhongtianyuan Environmental Engineering Co., Ltd., with 19 channels evenly distributed on the pipe, each The inner diameter of each channel is 3.3mm, the average aperture of the holes on the pipe wall is 50nm, and the ratio of the number of holes in the range of 50-55nm to the total number of holes is 98%); the channel on the pipeline is used as a liquid channel, and the pipeline The space formed by the outer w...

Embodiment 2

[0082] The coal direct liquefied oil was hydrotreated by the same method as in Example 1, the differences are as follows.

[0083] (1) The components in the gas-liquid mixer are as follows image 3 The membrane tube shown (commercially purchased from Beijing Zhongtianyuan Environmental Engineering Co., Ltd.; the average pore diameter of the pores on the substrate is 100 μm; the average pore diameter of the pores on the porous membrane is 500 nm, and the pores on the porous membrane have a pore diameter in the range of 500-550nm The proportion of the total holes is 95%); the porous membrane is located on the outer wall of the membrane tube; 7 channels are evenly distributed, and the inner diameter of each liquid channel is 6mm; the channel on the membrane tube is used as the liquid channel, and the membrane tube The space formed by the outer wall and the inner wall of the casing serves as a gas channel, and the filling rate of the membrane tube in the casing is 45%.

[0084] T...

Embodiment 3

[0088] The coal direct liquefied oil was hydrotreated by the same method as in Example 1, the differences are as follows.

[0089] (1) The components in the gas-liquid mixer are as follows figure 2 The membrane tube shown (commercially purchased from Beijing Zhongtianyuan Environmental Engineering Co., Ltd.; the average pore diameter of the pores on the substrate is 100 μm; the average pore diameter of the pores on the porous membrane is 250 nm, and the pores on the porous membrane have a pore diameter in the range of 250-260nm The proportion of the total holes is 95%); the porous membrane is located on the inner wall of the membrane tube; 7 channels are evenly distributed, and the inner diameter of each liquid channel is 6mm; the channel on the membrane tube is used as the liquid channel, and the membrane tube The space formed by the outer wall and the inner wall of the casing serves as a gas channel, and the filling rate of the membrane tube in the casing is 50%.

[0090] ...

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Abstract

The invention provides a method for stabilizing hydrogenation of direct coal liquefied oil, which comprises sending hydrogen gas into the direct coal liquefied oil through pores with an average pore diameter of nanometer size to obtain hydrogen-containing liquefied oil; flowing the hydrogen-containing liquefied oil upwards It is sent into a tubular fixed-bed reactor by means of a liquid-phase hydrotreating condition to contact with a hydrogenation catalyst. This method can obtain better hydrogenation treatment effect, effectively reduce the content of sulfur and nitrogen and residual carbon in the direct coal liquefaction oil, partially hydrogenate the polycyclic aromatic hydrocarbons in the direct coal liquefaction oil, and reduce the colloid and asphaltene content. Moreover, the method does not need to circulate hydrogen, reduces the scale of the hydrogenation reaction device, reduces the pressure level of the gas-liquid separation device, and reduces the investment cost and operating energy consumption of the hydrogenation device. In addition, the method can make the hydrogenation raw material carry a sufficient amount of hydrogen without introducing diluent oil and / or cycle oil into the hydrogenation raw material, and improves the effective processing capacity of the hydrogenation reaction device.

Description

technical field [0001] The invention relates to a hydrogenation stabilization method for directly liquefied coal oil. Background technique [0002] In recent years, the international oil market has been changing, and the price has been rising one after another. The issue of energy security has attracted widespread attention from all countries. In order to reduce dependence on oil resources and ensure energy security, countries all over the world are actively developing new fuels. China's national conditions are poor in oil and rich in coal. Therefore, the development of coal-based liquid fuel is an important way to solve the shortage of natural oil in our country. [0003] The liquefied oil produced by the direct coal liquefaction process is called direct coal liquefied oil. Coal direct liquefied oil is a complex mixed system of hydrocarbons. Usually, its aromatic content is as high as 60-80% by weight, olefin content is about 10% by weight, and the content of heteroatoms...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/02
Inventor 李华佘喜春李庆华曾志煜周俐曾文广
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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