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Preparation method for acidic supported hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as cracking reaction, reduce liquid yield, etc. Growth, avoid the effect of cracking side reactions

Active 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, adding too much acidic component will lead to cracking reaction and reduce the liquid yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A method for preparing an acidic supported hydrodesulfurization catalyst, which is characterized in that it comprises the following methods: loading a molecular sieve on the surface of a carbon-based material to obtain an acidic carbon-based carrier material; preparing a precursor solution for the active component of the hydrodesulfurization catalyst By immersing the acidic carbon-based support material in the precursor solution, the active components are supported on the surface of the acidic carbon-based support material, and then dried and calcined to obtain an acidic supported hydrodesulfurization catalyst.

[0026] The carbon-based material includes activated carbon, activated carbon fiber, carbon nanofiber, carbon nanotube, graphene nanoribbons, and mesoporous carbon.

[0027] The method for loading molecular sieves on the surface of carbon-based materials includes the following steps:

[0028] 1) Firstly, the carbon-based material is immersed in mineral acid, and then w...

Embodiment 1

[0049] Example 1: Preparation of traditional NiMo / C catalyst

[0050] The NiMo ammonia solution is prepared, and the measured basic nickel carbonate and ammonium molybdate are added to ammonia water and dissolved at 85° C. to form a uniform and transparent NiMo ammonia solution containing 6 wt% Mo and 1.5 wt% Ni. Put 10g of 20-40 mesh coal-based porous carbon into a 100ml beaker, and add 20ml of the previously prepared NiMo ammonia solution. Ultrasound for 30 minutes and let stand. The carbon material and the immersion liquid were transferred to a 250ml rotary evaporator, and heated to 85°C to evaporate the immersion liquid solution. Pour into another dry beaker and let stand overnight. Dry for 12 hours at 80°C in a vacuum drying oven and take it out.

[0051] The catalyst precursor is calcined in a tube furnace. The tube furnace has an inner diameter of 60mm and a length of 1000mm. The quartz tube in the tube furnace has a diameter of 55mm, a length of about 1400mm, and a con...

Embodiment 2

[0052] Example 2: Preparation of NiMo / CT catalyst

[0053] Measure 50ml of 6mol / L dilute nitric acid solution (mixed 1:1 of concentrated nitric acid and deionized water) and place it in a 250ml beaker. Weigh 20g, 20-40 mesh coal-based porous carbon. Soak the porous carbon in the solution, and ultrasonically treat it for 10 minutes to replace air bubbles. Continue to soak for 6 hours and then take it out, and wash until the washing liquid is PH=7. Measure 50ml of 20wt% sodium hydroxide solution (sodium hydroxide and deionized water are mixed in a mass ratio of 1:4), and place in a 250ml beaker. The acid-washed coal-based porous carbon is soaked in lye and ultrasonically treated for 10 minutes to replace air bubbles. Continue to soak for 6 hours and then take it out, and wash until the washing liquid is PH=7. Dry for 12 hours at 80°C in a vacuum drying oven and take it out.

[0054] The NiMo ammonia solution is prepared, and the measured basic nickel carbonate and ammonium molyb...

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Abstract

The invention discloses a preparation method of an acidic supported hydrodesulfurization catalyst. The preparation method comprises the following steps: loading a molecular sieve on the surface of a carbon-based material to obtain an acidic carbon-based carrier material; preparing a precursor solution of an active component of a hydrodesulfurization catalyst, and impregnating the acidic carbon-based carrier material in the precursor solution to load the active component on the surface of the acidic carbon-based carrier material; and carrying out drying and calcining to obtain the acidic supported hydrodesulfurization catalyst. According to the method, the carbon-based material is used as a carrier, the molecular sieve controllably and directionally grows on the surface of the carbon-basedmaterial, and acid sites and a NiMoS active center are highly dispersed and mutually matched with each other by utilizing the isolation effect of a three-dimensional space structure of the carbon-based material, and thus, the isomerization joint promotion of the active component and B acid is realized. The growth of the active center and molecular sieve grains can be inhibited under hydrodesulfurization reaction conditions, a cracking side reaction caused by excessive concentration of B acid is avoided, and the generation of deposited carbon is reduced.

Description

Technical field [0001] The invention relates to the field of hydrodesulfurization, in particular to a preparation method of an acidic supported hydrodesulfurization catalyst. Background technique [0002] With the increasingly stringent environmental regulations and the increasingly serious smog, the use of hydrodesulfurization technology to produce clean fuel has attracted widespread attention in the industry. However, the deterioration of crude oil and the depletion of petroleum resources make the application of existing hydrodesulfurization catalysts face challenges. The active components of industrial hydrodesulfurization catalysts are generally Ni-Mo, Co-Mo, Ni-W systems, and the support is usually alumina. Researchers mostly improve the hydrogenation capacity of the catalyst by changing the active metal components (such as using precious metals), and improving the catalyst by means of additives (such as adding F, B, P, etc. to the carrier) and doping with molecular sieve a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J29/076B01J29/03B01J35/10B01J37/10C10G45/08C10G45/12
CPCB01J23/883B01J29/076B01J29/0341B01J37/10C10G45/08C10G45/12B01J2229/18C10G2300/202B01J35/61
Inventor 姚颂东王祉衡董延增于晓航刘艳艳徐国忠
Owner UNIV OF SCI & TECH LIAONING
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