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Preparation method of hydrodesulfurization catalyst with mesoporous carbon material as carrier

A hydrodesulfurization and catalyst technology, applied in the petrochemical field, can solve problems such as uneven distribution of eggshell catalysts, and achieve high removal activity

Pending Publication Date: 2022-01-07
泰州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, most of the current common hydrodesulfurization catalysts are obtained by vulcanizing the active components on the carrier, which is easy to form eggshell catalysts with uneven distribution.

Method used

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  • Preparation method of hydrodesulfurization catalyst with mesoporous carbon material as carrier
  • Preparation method of hydrodesulfurization catalyst with mesoporous carbon material as carrier
  • Preparation method of hydrodesulfurization catalyst with mesoporous carbon material as carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 0.88g thiourea, 0.93g cobalt molybdenum heteropoly acid, 42.12g sodium chloride and 3.15g glucose into 200mL distilled water and stir for 30 minutes to make them fully mixed. The solution was frozen in a -80°C refrigerator, then transferred to a lyophilizer for vacuum sublimation and drying for 72 hours to obtain a light blue solid powder. The fully dried sample was placed in a high-temperature furnace, protected by nitrogen, and baked at 750°C for 3 hours; after the sample was cooled to room temperature, it was taken out and washed with a large amount of distilled water to ensure that no template remained. Finally, wash and disperse with absolute ethanol to ensure that the product will not agglomerate in large quantities. The washed samples were placed in a vacuum oven at 70°C overnight. After the sample is dried, it is fully ground and evenly obtained as the sulfided cobalt-molybdenum hydrodesulfurization catalyst 1.

[0028] figure 1 For the cobalt-molybdenu...

Embodiment 2

[0033] The preparation process of the catalyst is the same as in Example 1, except that the molybdenum salt and cobalt salt are replaced by ammonium molybdate and cobalt nitrate in the preparation process of the catalyst precursor, and the amount of sulfurizing agent is increased. Present embodiment catalyst preparation method is as follows:

[0034] Weigh 0.88g of thiourea, 0.95g of ammonium molybdate, 0.78g of cobalt nitrate, 42.12g of sodium chloride and 3.15g of glucose into 200mL of distilled water and stir for 30 minutes to fully mix them evenly. The solution was frozen in a -80°C refrigerator, then transferred to a lyophilizer for vacuum sublimation and drying for 72 hours to obtain a light blue solid powder. The fully dried sample was placed in a high-temperature furnace, protected by nitrogen, and baked at 750°C for 3 hours; after the sample was cooled to room temperature, it was taken out and washed with a large amount of distilled water to ensure that no template re...

Embodiment 3

[0036] The preparation process of the catalyst is the same as in Example 1, except that the template agent used to prepare the catalyst precursor is potassium chloride, and the carbon source is citric acid. Present embodiment catalyst preparation method is as follows:

[0037] Weigh 0.88g thiourea, 0.93g cobalt-molybdenum heteropolyacid, 38.25g potassium chloride and 3.36g citric acid respectively and add them into 200mL distilled water and stir for 30 minutes to make them fully mixed. The solution was frozen in a -80°C refrigerator, then transferred to a lyophilizer for vacuum sublimation and drying for 72 hours to obtain a light blue solid powder. The fully dried sample was placed in a high-temperature furnace, protected by nitrogen, and baked at 750°C for 3 hours; after the sample was cooled to room temperature, it was taken out and washed with a large amount of distilled water to ensure that no template remained. Finally, wash and disperse with absolute ethanol to ensure ...

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Abstract

The invention relates to a preparation method of a hydrodesulfurization catalyst taking a mesoporous carbon material as a carrier, and the preparation method of the catalyst comprises the following steps: uniformly mixing molybdenum salt, cobalt salt, a template agent, a carbon source and a vulcanizing agent according to certain parts by weight to form a precursor solution of the catalyst, and then carrying out freezing and vacuum sublimation drying; and finally, roasting, washing and drying the product to obtain the mesoporous structure carbon material loaded high-activity hydrodesulfurization catalyst with uniformly distributed active components. According to the invention, in-situ growth of a high-activity II-type CoMoS active phase and synchronous synthesis and effective riveting of a mesoporous carbon structure are realized, and the catalyst is rich in active sites, developed in pore structure, small in mass transfer resistance and relatively high in hydrodesulfurization reaction activity.

Description

technical field [0001] The invention relates to the preparation of catalysts in the petrochemical field, in particular to a method for preparing a hydrodesulfurization catalyst with a highly active mesoporous carbon material as a carrier. Background technique [0002] With the increasing demand for oil and fuel oil processing depth and environmental protection requirements, countries have successively introduced more stringent environmental protection regulations. Among them, my country implemented the National V Motor Vehicle Pollutant Emission Standard (sulfur content ≤ 10 μg) at the end of 2017. / g), in 2019, the "most stringent" national VI emission standards will be fully implemented, which puts forward higher requirements for the emission standards of sulfur compounds in fuel. The accelerated upgrading of fuel oil quality has brought great opportunities and challenges to my country's oil refining industry. Deep hydrodesulfurization is an important way to produce clean o...

Claims

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Application Information

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IPC IPC(8): B01J27/051C10G45/08
CPCB01J27/0515C10G45/08C10G2300/202
Inventor 梁吉雷吴萌萌高新星朱年青宋玉鹤
Owner 泰州学院
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