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A diesel ultra-deep desulfurization system

A technology for deep desulfurization and diesel oil, which is applied in the treatment of hydrocarbon oil, petroleum industry, organic compound/hydride/coordination complex catalyst, etc., to achieve the effect of improving operation cycle, low hydrogen consumption and high economy

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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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 provide a diesel ultra-deep desulfurization system to solve the problems caused by H in the ultra-deep hydrodesulfurization process in the prior art. 2 The problem with S inhibition

Method used

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  • A diesel ultra-deep desulfurization system
  • A diesel ultra-deep desulfurization system
  • A diesel ultra-deep desulfurization system

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A high-sulfur straight-run diesel oil distillate from the Middle East is used as the raw material 1, and its properties are shown in Table 1. The raw material oil 1 is mixed with the reactor effluent and hydrogen in the raw material treatment area, and the mixed material is introduced into the first reactor equipped with catalyst D1. In the liquid phase reactor of the first hydrogenation reaction zone, the deep hydrogenation desulfurization reaction is carried out, the reaction conditions are: reaction temperature 360 ​​℃, raw material oil liquid hourly volume space velocity 2.2h -1 , the reaction system pressure is 8.0MPa.

[0049] The effluent from the first reaction zone enters the high-temperature and high-pressure separation zone and is fed with hydrogen for stripping. The operating conditions are: 320°C, 8.0MPa, hydrogen-to-oil ratio 6.0Nm 3 / m 3 , the liquid phase separated by the high-temperature and high-pressure separator, part of which is recycled back to th...

Embodiment 2

[0059] A mixture of Middle East high-sulfur straight-run diesel fraction and secondary processed FCC diesel fraction is used as feedstock 2, and its properties are shown in Table 1. The reaction system provided by the invention is used for processing. The first hydrogenation reaction zone is equipped with a liquid-phase hydrogenation reactor, filled with hydrogenation refining catalyst D1, and the reaction conditions are: reaction temperature 365 ° C, raw material oil liquid hourly volume space velocity 1.6h -1 , the reaction system pressure is 8.0MPa. Hydrofining catalyst D1 has 3 beds in the reactor, wherein the volume of 1 bed is 15%, the volume of 2 beds is 30%, and the volume of 3 beds is 55%. There is a mixer to mix the reactor flow with hydrogen. The concentration of hydrogen in the reactor stream at the outlet of bed 1 is greater than 5×10 -4 g H 2 / g, there is no need to mix with external hydrogen in the mixer.

[0060] The effluent from the first reactor enters ...

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Abstract

A diesel ultra-deep desulfurization system. In the system, the outlet of the first hydrogenation reaction zone is connected to the entrance of the high-temperature and high-pressure separation zone. A liquid phase circulation line is set between the raw material processing zone and the high-temperature and high-pressure separation zone. It is connected with the inlet of the second hydrogenation reaction zone, the gas phase outlet of the high temperature and high pressure separation zone is connected with the gas treatment zone, the outlet of the second hydrogenation reaction zone is connected with the low temperature separation zone, the first hydrogenation reaction zone and the second hydrogenation reaction zone are connected. Hydrogen injection lines are installed in each area; compared with the prior art, the system of the present invention is less inhibited by H2S during ultra-deep hydrodesulfurization, has strong adaptability to raw oil, and has high stability of catalysts in the system. This system can process a relatively large proportion of secondary processed diesel oil, and produce high-quality diesel with sulfur content meeting the requirements of Euro V emission standards, and the chromaticity of diesel products is less than 1.0.

Description

technical field [0001] The invention belongs to a system for processing hydrocarbon oil under the condition of hydrogen, more specifically, it is a diesel ultra-deep hydrogenation desulfurization system. Background technique [0002] The problem of environmental pollution caused by automobile exhaust has attracted widespread attention worldwide. Diesel, as an important vehicle fuel, emits sulfur oxides (SO X ), nitrogen oxides (NO X ) and particulate matter (PM) are important causes of air pollution. Diesel standards are becoming increasingly stringent worldwide, and the production of environmentally friendly low-sulfur or ultra-low-sulfur diesel has become a problem that governments and refineries around the world have generally paid attention to. EU countries have implemented the Euro V emission standard since 2009, which limits the sulfur content of diesel products below 10 μg / g. Refineries in Europe, America, Japan and other countries and regions have generally suppl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C10G45/08B01J31/34
Inventor 丁石高晓冬王哲张锐张乐
Owner CHINA PETROLEUM & CHEM CORP