A deep desulfurization catalyst and its preparation method and application

A desulfurization catalyst and deep desulfurization technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. tight effect

Active Publication Date: 2020-07-10
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above process is too complicated and the cost is greatly limited

Method used

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  • A deep desulfurization catalyst and its preparation method and application
  • A deep desulfurization catalyst and its preparation method and application
  • A deep desulfurization catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This implementation provides a kind of preparation method of desulfurization catalyst, and this method comprises the following steps:

[0043] Step 1, take by weighing 1.34g ammonium heptamolybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 4.50 g of cobalt acetate tetrahydrate (Co(OOCCH 3 ) 2 4H 2 (2), it was added to 8mL glacial acetic acid and 100mL water mixed solution and stirred to dissolve, then 0.25g of hydrazine sulfate was added to stir to dissolve, and stirred at a constant temperature at 65°C for 3d, the crystal product obtained was suction filtered, washed and dried, A heteropoly compound is obtained.

[0044] Step 2, disperse 0.14g of heteropoly compound in 70mL of deionized water for 5h ultrasonic treatment, then add 1g of aluminum oxide (20-40 mesh), stir evenly, transfer to a polytetrafluoroethylene-lined high-pressure In the still, under the condition of 120 ℃, the hydrothermal dispersion loading reaction was carried out for 24 hours. After ...

Embodiment 2

[0054] The present implementation provides a kind of preparation method of the desulfurization catalyst of sulfuration, and it comprises the steps:

[0055] The CoMo-HHD prepared in Example 1 is diluted with quartz sand at a volume ratio of 1:1, and packed into a stainless steel reactor with an internal diameter of 8.0mm and a length of 320mm; 2 Under the conditions, dry at 120°C for 2h, and then introduce a vulcanizing agent (3wt% of CS 2 n-heptane solution), the vulcanization pressure is 4MPa, and the vulcanization agent volume space velocity is 8h -1 , the volume ratio of hydrogen to oil is 300:1, and the temperature is raised to 360°C at a rate of 2°C / min, and kept for 5h to obtain sulfided CoMo-HHD, which is designated as CoMoS-HHD.

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Abstract

The invention provides a deep desulfurization catalyst and a preparation method and application thereof. The preparation method of the deep desulfurization catalyst includes: weighing ammonium paramolybdate and cobalt acetate tetrahydrate, dissolving into glacial acetic acid and water mixed solution, stirring to dissolve, adding hydrazine sulfate, stirring to dissolve, performing stirring reactionin a constant-temperature water bath to obtain a cobalt-molybdenum heteropoly compound after reaction is finished; dispersing the cobalt-molybdenum heteropoly compound into water, ultrasonically treating, adding aluminum oxide, well stirring, and performing hydrothermal load dispersion in an autoclave to obtain the desulfurization catalyst after reaction is finished. The desulfurization catalystis high in dispersion performance and activity, deep desulfurization can be realized, and the desulfurization rate is up to 94.1%.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a deep desulfurization catalyst and its preparation method and application. Background technique [0002] In order to control the content of sulfide in the environment, environmental protection regulations have increasingly stringent requirements on the sulfur content of petroleum products. Hydrotreating is an effective way to reduce the sulfur content of diesel oil. Its desulfurization effect mainly depends on the hydrodesulfurization (HDS) activity of the catalyst used. Therefore, it is urgent to continuously improve the performance of hydrogenation catalysts. How to combine additives with active metals to form more highly active CoMoS active phases is the key to bimetallic hydrodesulfurization catalysts. To this end, researchers have studied and improved the introduction of additives. [0003] In recent years, the preparation of HDS catalysts using heteropoly compounds as ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/10B01J37/10B01J37/20C10G45/08
CPCB01J27/0515B01J35/0013B01J35/1019B01J35/1042B01J35/1061B01J37/10B01J37/20C10G45/08C10G2300/202
Inventor 范煜黄婷婷
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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