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Ultra-deep desulfurization catalyst, preparation method thereof and application of catalyst

A desulfurization catalyst and deep desulfurization technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as cost constraints and complex processes, and achieve the effect of increasing the degree of modification and increasing the relative content

Active Publication Date: 2019-02-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Ultra-deep desulfurization catalyst, preparation method thereof and application of catalyst
  • Ultra-deep desulfurization catalyst, preparation method thereof and application of catalyst
  • Ultra-deep desulfurization catalyst, preparation method thereof and application of catalyst

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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 nickel acetate tetrahydrate (Ni(OOCCH 3 ) 2 4H 2 0), 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 and stirred to dissolve, after about 15min, after hydrazine sulfate was completely dissolved, it was stirred and reacted at a constant temperature in a water bath at 65°C for 3d, The obtained crystalline product was suction-filtered, washed with water and dried to obtain polyoxometalate.

[0044] Step 2: Disperse 0.23g of polyoxometalates in 70mL of deionized water for 5 hours of ultrasonic treatment, then add 1g of aluminum oxide (20-40 mesh), stir evenly, and transfer to polytetrafluoroethylene In the lined autoclave, under...

Embodiment 2

[0055] The present implementation provides a kind of preparation method of the desulfurization catalyst of sulfuration, and it comprises the steps:

[0056] The NiMo-HPD 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 NiMo-HPD, which is designated as NiMoS-HPD.

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Abstract

The invention provides an ultra-deep desulfurization catalyst, a preparation method thereof and an application of the catalyst. The preparation method of the desulfurization catalyst includes the steps: weighing ammonium paramolybdate and nickel acetate tetrahydrate, dissolving the ammonium paramolybdate and the nickel acetate tetrahydrate in glacial acetic acid and water mixed solution in a stirring manner; adding hydrazine sulfate and dissolving the hydrazine sulfate in a stirring manner; performing stirring reaction in a thermostatic water bath to obtain polyoxometallate after reaction; dispersing the polyoxometallate in water and performing ultrasonic treatment; adding aluminum oxide, uniformly stirring the materials and performing hydro-thermal decentralization loading in an autoclaveto obtain the desulfurization catalyst after reaction. The prepared desulfurization catalyst is good in dispersing performance and high in activity, ultra-deep desulfurization can be achieved, and desulfurization rate reaches up to 93.8%.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to an ultra-deep desulfurization catalyst and its preparation method and application. Background technique [0002] In recent years, various environmental protection laws and regulations have increasingly stringent requirements on the emission of air pollutants, which has accelerated the pace of upgrading the quality of domestic oil products. In order to meet the production requirements of ultra-low sulfur clean diesel, it is necessary to improve the existing diesel desulfurization technology to increase the desulfurization efficiency. As the main means of ultra-deep desulfurization of diesel oil, the role of hydrodesulfurization technology is becoming more and more important. In the diesel fraction, sulfur in dibenzothiophene (DBT) compounds is the most difficult to remove, especially 4,6-dimethyldibenzothiophene (4,6-dimethyldibenzothiophene (4, 6-DMDBT). The presence of substi...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10B01J37/20C10G45/06
CPCB01J27/051B01J37/10B01J37/20C10G45/06C10G2300/202
Inventor 范煜黄婷婷
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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