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Preparation method for high-activity hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of improving intrinsic activity

Pending Publication Date: 2019-11-19
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of new catalytic materials for hydrodesulfurization using carbon as a carrier.

Method used

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  • Preparation method for high-activity hydrodesulfurization catalyst
  • Preparation method for high-activity hydrodesulfurization catalyst

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preparation example Construction

[0028] A preparation method of a high-activity hydrodesulfurization catalyst, the method uses carbon-based materials as a carrier, and the carbon-based materials are surface-modified; Hydrodesulfurization precursor solution, the modified carbon-based material is impregnated in the precursor solution, the active component is impregnated on the surface of the carrier, and then dried and calcined to obtain a carbon-based material containing NiMo or CoMo or NiMo active component Hydrodesulfurization catalyst.

[0029] The carbon-based material includes activated carbon, activated carbon fiber, carbon nanofiber, carbon nanotube, graphene nanoribbon, and mesoporous carbon.

[0030] The surface modification method of carbon-based materials is oxidation treatment, including acid oxidation, oxidizing gas activation, and potassium permanganate oxidation.

[0031] The acid oxidation includes inorganic acid and organic acid oxidation.

[0032] Inorganic acids for acid oxidation include ...

Embodiment 1

[0052] Example 1: Preparation of traditional NiMo / C catalyst, marked as comparative example NiMo / C-1.

[0053] Put 10g, 10-20 mesh coal-based porous carbon into a 100ml beaker, add 10ml NiMoP solution containing 12wt%Mo, 3wt%Ni, 0.5wt%P prepared in advance. Sonicate for 30 minutes and let stand. Transfer the above carbon material and impregnating solution to a 250ml rotary evaporator, heat to 85°C and evaporate the impregnating solution to dryness. Pour into another dry beaker and let stand overnight. Bake at 120°C for 6 hours in an ordinary drying oven and take it out.

[0054] Catalyst precursor calcination was carried out in a tube furnace. The tube furnace has an inner diameter of 60mm and a length of 1000mm. The diameter of the quartz tube in the tube furnace is 55mm, the length is about 1400mm, and the constant temperature section is 400mm. Put the dried NiMo / C material into a quartz boat with a length of 100 mm and a width of 30 mm. Push the above-mentioned quartz...

Embodiment 2

[0055] Example 2: Preparation of NiMo / C-2 catalyst, the precursor solution in this example is a water-soluble solution of single metal Ni and Mo.

[0056] Measure 50ml of 6M dilute nitric acid solution (mix concentrated nitric acid and deionized water at a ratio of 1:1), and place it in a 250ml beaker. Weigh 20g, 10-20 mesh coal-based porous carbon. The porous carbon was soaked in the solution and treated with ultrasound for 10 minutes to replace the air bubbles. Take it out after continuing to soak for 2 hours, and wash until the washing solution is PH=7.

[0057] Put 10 g of activated coal-based porous carbon into a 100 ml beaker, and add 10 ml of 12 wt % ammonium molybdate solution prepared in advance. Sonicate for 30 minutes and let stand. Transfer the above carbon material and impregnating solution to a 250ml rotary evaporator, heat to 85°C and evaporate the impregnating solution to dryness. Pour into another dry beaker and let stand overnight. Bake in a vacuum oven ...

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Abstract

The invention provides a preparation method for a high-activity hydrodesulfurization catalyst. The method comprises the following steps: with a carbon-based material as a carrier, subjecting the carbon-based material to surface modification; preparing a hydrodesulfurization precursor solution containing the active components Ni and Mo, or the active components Co and Mo or the active components Niand Mo; and immersing a modified carbon-based material into the hydrodesulfurization precursor solution to allow the active components to be impregnated onto the surface of the carrier, and carryingout drying and calcining so as to obtain a carbon-based hydrodesulfurization catalyst containing the active components Ni and Mo, or the active components Co and Mo or the active components Ni and Mo.According to the invention, through surface treatment of a carbon material carrier, such as oxidation with oxidizing acid or treatment with oxidizing gas, the surface of the carbon material carrier can be rich in hydroxyl groups. By adjusting and changing of the degree of treatment, the active components of the carrier can be changed from single-layer dispersion to few-layer and multi-layer dispersion. Thus, sulfurization of the Ni and Mo components can be realized to a maximum extent; and the intrinsic activity of the hydrodesulfurization catalyst can be substantially improved.

Description

technical field [0001] The invention relates to the field of hydrodesulfurization, in particular to a preparation method of a highly active hydrodesulfurization catalyst. Background technique [0002] With the development of road transportation and increasingly stringent environmental regulations, the production of clean fuel has attracted widespread attention. At present, hydrodesulfurization is still the best way to achieve industrial clean fuel production. However, with the increasing depletion of oil resources worldwide, the recoverable oil resources are facing the problem of heavy and poor quality, which makes the current industrial production of hydrodesulfurization face a bottleneck. The development of high-efficiency industrial hydrodesulfurization catalysts to meet the increasingly stringent environmental protection standards has become the focus of close attention by scientific research institutes around the world. [0003] The active components of hydrodesulfuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J37/02B01J37/08B01J37/12B01J37/14C10G45/08
CPCB01J23/882B01J23/883B01J37/0201B01J37/082B01J37/12B01J37/14B01J37/0045C10G45/08C10G2300/202
Inventor 姚颂东于晓航董延增王祉衡刘艳艳徐国忠
Owner UNIV OF SCI & TECH LIAONING
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