Adsorption desulfurization method

An adsorption desulfurization and adsorbent technology, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of large fluctuations in the sulfur content of reaction products, etc., and achieve the goal of improving the utilization rate of reaction activity, increasing the sulfur loading capacity, and reducing the regeneration frequency Effect

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Although this method can achieve deep desulfurization, the sulfur content of the reaction product is greatly affected by the fluctuation of the sulfur content of the raw material

Method used

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  • Adsorption desulfurization method

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Effect test

Embodiment 1

[0035] In a fluidized bed reactor with two reaction zones, FCC gasoline raw material B with lower sulfur content is selected as the reaction raw material, and hydrogen is used as the hydrogen supply medium. speed is 5h -1 , react under the reaction conditions of hydrogen oil volume ratio 45, specific reaction conditions are listed in Table 2. The results show that the sulfur content of the reaction product is lower than 0.5ppm (chromatographic detection limit) at the initial stage of the reaction, and as the reaction time progresses, the sulfur content in the product gradually increases, but because the raw material sulfur content is low, only 204.5ppm, so in the reaction At the end, the sulfur content of the product is only 3.6ppm, and because the olefin content of the raw material is also low, the loss of anti-violence index is only 0.2 units.

Embodiment 2

[0037] On a fluidized stretcher with two reaction zones, FCC gasoline raw material A with relatively high sulfur content is selected as the reaction raw material, and hydrogen is used as the hydrogen supply medium. for 5h -1 , under the reaction conditions of hydrogen oil volume ratio of 45, the specific reaction conditions and results are listed in Table 2. Due to the increase of raw material olefin content, the loss of anti-violence index was 0.3 units. Compared with raw material B with lower sulfur content, the sulfur content of raw material A increased significantly, resulting in a rapid rise of sulfur content in the product with the prolongation of reaction time, but still Keep at a low level, the sulfur content of the product is only 10.8ppm at the end of the reaction.

Embodiment 3

[0039] In a fluidized bed reactor with two reaction zones, FCC gasoline raw material A with relatively high sulfur content is selected as the reaction raw material, and hydrogen is used as the hydrogen supply medium. speed is 7h -1 , under the reaction conditions of hydrogen oil volume ratio of 100, the specific reaction conditions and results are listed in Table 2. Due to the increase of reaction pressure and reaction temperature, the sulfur content of the reaction product is only 3.8ppm at the end of the reaction, and the loss of anti-violence index is only 0.5 units. Although a substantial increase in the reaction pressure and reaction hydrogen-oil ratio may lead to an increase in the loss of the anti-violence index, due to the increase in the reaction temperature at the same time, the progress of the hydrogenation reaction is inhibited, and the cracking ability of the adsorbent is enhanced, and the number of small molecular hydrocarbons increases. Therefore, the anti-viol...

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Abstract

The invention relates to an adsorption desulfurization method. According to the method, a hydrocarbon raw material and a hydrogen donor enter a fluidized bed reactor having a plurality of reaction zones from the bottom of the reactor; a reduced desulfurization adsorbent enters the reactor from the top; the hydrocarbon raw material and the hydrogen donor are subjected to countercurrent contact with the reduced desulfurization adsorbent, wherein the desulfurized hydrocarbon is separated; the sulfur-loaded spent desulfurization adsorbent enters a fluidized bed regenerator, and contacts a regeneration air to carry out regeneration; the regenerated desulfurization adsorbent enters a redactor, and contacts a reduction air to carry out reduction; and the reduced desulfurization adsorbent returns to the reactor from the bottom of the fluidized bed reactor. With the method of the present invention, a sulfur loading amount of a spent sorbent is substantially increased, a regeneration frequency of an adsorbent required by removal of unit amount of sulfur is reduced, and activity and stability of the desulfurization sorbent are increased.

Description

technical field [0001] The invention belongs to a method for desulfurizing hydrocarbon oil, in particular to a method for reducing sulfur content in hydrocarbon oil through fluidized bed countercurrent reaction adsorption under the condition of hydrogen. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on the sulfur content in light hydrocarbons used as fuels are becoming more and more stringent. Taking gasoline as an example, the European Union has stipulated that the sulfur content should not exceed 50 μg / g in 2005, and in the Euro V gasoline standard planned to be implemented in 2010, the sulfur content should be less than 10 μg / g. China's National III standard, which was implemented on December 31, 2009, stipulates that the sulfur content of gasoline should not exceed 150 μg / g. Therefore, if China's fuel oil standard is to be in line with international standards, deep desulfurization must be carried out. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G25/00
Inventor 王文寿毛安国刘宪龙徐莉张久顺
Owner CHINA PETROLEUM & CHEM CORP
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