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A kind of non-precious metal supported catalyst, its preparation method and application

A technology for supporting catalysts and non-precious metals, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of easy loss of active components of catalysts, achieve enhanced possibilities, improve catalytic efficiency, The effect that is not easy to lose

Active Publication Date: 2021-10-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst carbon support is modified by carboxyl group and hydroxyl group, and can be used as the anchor point of the metal active component in the hydrothermal vulcanization process. The problem of easy loss of catalyst active components

Method used

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  • A kind of non-precious metal supported catalyst, its preparation method and application
  • A kind of non-precious metal supported catalyst, its preparation method and application
  • A kind of non-precious metal supported catalyst, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) preparation of catalyst, concrete steps are as follows:

[0044] The mass fraction is 10% ordinary carbon nanotubes (outer diameter 10-20nm, length 0.5-20μm) are added in the concentrated nitric acid of 10mol / L, heated and refluxed at 80 ℃ for 12 hours, then washed with water until the supernatant pH > 4 and Dry at 100°C for 24h. Then add 2wt% of the above-mentioned modified carbon nanotubes in water, add 1wt% polyoxyethylene octyl phenyl ether at the same time, ultrasonically prepare the carbon nanotube dispersion, take 40mL of the above-mentioned carbon nanotube dispersion, stir and disperse in 760mL Add 5.72 grams of ammonium molybdate, 2.33 grams of nickel nitrate, 15.52 grams of anhydrous citric acid, and 9.14 grams of thiourea into the water at the same time. After mixing well, transfer to 200°C for hydrothermal treatment for 24 hours, then filter the obtained sample and vacuum at 60°C (vacuum degree is 0.1 atmospheric pressure) and dried for 48h to obtain th...

Embodiment 2-5

[0047] (1) The preparation concrete steps of embodiment 2-5 catalyst are as follows:

Embodiment 2

[0048] Example 2 Catalyst NiMoS / SWCNTs (SWCNTs are single-walled carbon nanotubes) preparation: add single-walled carbon nanotubes (outer diameter 1-2 nm, length 5-30 μm) with a mass fraction of 10% to 10 mol / L concentrated nitric acid and 10 mol / L concentrated sulfuric acid (v / v=3), heated to reflux at 80°C for 12h, washed with water until the supernatant had a pH>4, and dried at 100°C for 24h. Add the above-mentioned 2wt% modified carbon nanotubes and 1wt% polyoxyethylene octyl phenyl ether into water, and obtain a carbon nanotube dispersion after ultrasonication for 5 hours. Take 40mL of the carbon nanotube dispersion, stir and disperse it in 760mL of water, add 5.72 grams of ammonium molybdate, 2.33 grams of nickel nitrate, 15.52 grams of anhydrous citric acid, and 9.14 grams of thiourea. hours, then filtered and washed until the supernatant was colorless, and dried in a vacuum oven at 80°C (vacuum degree of 0.1 atmosphere) for 48 hours to obtain the above-mentioned sulfur...

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Abstract

The invention discloses a non-precious metal vulcanized supported catalyst, which is at least one of molybdenum or tungsten, at least one of cobalt or nickel supported on a carrier in a fully or partially vulcanized state; the carrier includes carbon materials; wherein The mass of at least one of molybdenum or tungsten is 10-50% of the total mass of the catalyst, the mass of at least one of cobalt or nickel is 1-20% of the total mass of the catalyst, and the mass of the carrier is 1-20% of the total mass of the catalyst . The invention also discloses the preparation method and application of the catalyst. Compared with the prior art, the catalyst of the present invention has high content of active components, many active site exposure sites, and the active components are evenly dispersed on the carbon material, which is used to prepare fuels with high thermal stability and has high hydrodesulfurization and Aromatic saturation activity.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and specifically relates to a non-precious metal supported catalyst, its preparation method and its use in hydrodesulfurization and aromatic hydrocarbon saturation of aviation kerosene to obtain fuel with high thermal stability. Background technique [0002] At present, the standard operating temperature of jet fuel used in aircraft in my country is limited to 260°C (GB 6537-2018). However, when hypersonic aircraft fly at a high Mach number (5+Mach), power fuels are required to have good combustion performance. , must also be used to cool the flight system, and the fuel can be heated to 300°C or even higher during the cooling process. [0003] At present, high-performance fuels generally use hydrorefining methods to reduce the content of unsaturated aromatic components in fuels, and remove impurities such as sulfur and nitrogen to the greatest extent, thereby improving the thermal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051C10G45/08
CPCB01J27/051C10G45/08C10G2300/202C10G2300/70
Inventor 邹吉军徐继盛潘伦张香文
Owner TIANJIN UNIV
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