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Carbon loaded nickel metal catalyst and preparation method thereof

A metal catalyst and nickel-supported technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, carbon preparation/purification, chemical instruments and methods, etc., can solve the problems of inability to recycle, waste of resources, and catalyst deactivation and other issues, to achieve the effect of saving resources, good stability and high activity

Inactive Publication Date: 2017-06-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although by adding different types of metal additives, such as magnesium oxide, strontium oxide, etc., the performance of the catalyst has been improved and improved, but there is still catalyst deactivation caused by carbon deposition
Moreover, when the catalyst is used, the mixture of metal oxides cannot be recycled and reused, wasting limited and precious resources

Method used

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  • Carbon loaded nickel metal catalyst and preparation method thereof
  • Carbon loaded nickel metal catalyst and preparation method thereof
  • Carbon loaded nickel metal catalyst and preparation method thereof

Examples

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preparation example Construction

[0040] A method for preparing a carbon-supported nickel metal catalyst, comprising the steps of:

[0041] Step 1. Pretreatment of carbon source: mix carbon source with 0.1-1mol / L nitric acid, sulfuric acid or phosphoric acid solution at a ratio of 200-350g:400-1000mL, and reflux at a temperature of 70-85°C for 6-12 hours Filtrate, wash the filter residue with deionized water until pH=7; then dry at 100-110°C for 8-12 hours to obtain solid A, keep solid A at 150-180°C for 12-24 hours, wash, After drying at ℃ for 8-12 hours, solid B was obtained;

[0042] Step 2. Preparation of nickel-based catalyst precursor: dissolve the nickel-containing compound in deionized water, stir until completely dissolved to obtain solution C, and then add solid B or carbon source to solution C equal in volume or amount to B or carbon source After standing at room temperature for 12-24 hours, dry at 100-110°C for 8-12 hours to obtain solid D;

[0043]Step 3. Preparation of carbon-supported nickel m...

Embodiment 1

[0050] Catalyst preparation:

[0051] (1) Take 250g of starch and put it into a round bottom flask containing 1000mL of 0.1mol / L nitric acid solution, reflux for 10h at a temperature of 70°C and a rotation speed of 900RPM, then wash with deionized water until the supernatant pH=7, then Dry at a temperature of 100° C. for 12 h to obtain solid A. A was subjected to hydrothermal treatment at a temperature of 180° C. for 24 hours, washed, and dried at 100° C. for 12 hours to obtain solid B.

[0052] (2) Dissolve 36 g of nickel nitrate hexahydrate in 200 mL of deionized water and stir until completely dissolved to obtain solution C. Then 20 g of solid B obtained in step (1) was added to solution C, and after standing at room temperature for 24 hours, it was dried at 100° C. for 12 hours to obtain solid D.

[0053] (3) Take 300 mg of solid D obtained in step (2) and send it into a quartz reaction tube with an outer diameter of 1 inch, and use a program temperature control heating ...

Embodiment 2

[0057] Catalyst preparation:

[0058] (1) Take 250g of starch and put it into a round bottom flask filled with 800mL 0.5mol / L nitric acid solution, reflux for 8 hours at a temperature of 75°C and a rotation speed of 800RPM, then wash with deionized water until the supernatant pH=7, then Dry at a temperature of 100° C. for 12 h to obtain solid A. A was subjected to hydrothermal treatment at a temperature of 150°C for 24 hours, washed, and dried at 100°C for 12 hours to obtain solid B.

[0059] (2) Dissolve 42 g of nickel nitrate hexahydrate in 200 mL of deionized water, and stir until completely dissolved to obtain solution C. Then 20 g of solid B obtained in step (1) was added to solution C, and after standing at room temperature for 24 hours, it was dried at 100° C. for 12 hours to obtain solid D.

[0060] (3) Get 300 mg of the solid D obtained in step (2) and send it into a quartz reaction tube with an outer diameter of 1 inch, and use a program temperature control to heat...

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Abstract

The invention discloses a carbon loaded nickel metal catalyst and a preparation method thereof. The carbon loaded nickel metal catalyst is prepared by the following steps: mixing a carbon source with a nitric acid, sulfuric acid or phosphoric acid solution with the concentration of 0.1mol / L to 1mol / L according to the ratio of (200g to 350g) : (400mL to 1000mL); reflowing at temperature of 70 DEG C to 85 DEG C for 6h to 12h, and filtering; washing filter dreg with de-ionized water until the pH (Potential of Hydrogen) of a washing solution is equal to 7; drying at 100 DEG C to 110 DEG C for 8h to 12h to obtain a solid A; keeping the heat of the solid A at 150 DEG C to 180 DEG C for 12h to 24h, and washing; drying at 100 DEG C to 110 DEG C for 8h to 12h to obtain a solid B; dissolving a nickel-containing compound into de-ionized water; stirring until the nickel-containing compound is completely dissolved, so as to obtain a solution C; adding the solid B into the solution C with the volume the same as that of the solid B; standing at room temperature for 12h to 24h; drying at 100 DEG to 110 DEG C for 8h to 12h to obtain a solid D; putting the solid D into gas flow without oxygen, heating to 700 DEG C to 1100 DEG C, and keeping the heat for 1h to 5h; then naturally cooling to room temperature. The catalyst prepared by the method has high activity and good stability; pure methane or natural gas is used as a reactant at 850 DEG C, and the reforming reaction is stabilized for at least 1000h.

Description

technical field [0001] The invention relates to a carbon-supported nickel metal catalyst and a preparation method thereof. Background technique [0002] As a big energy consumption country in my country, the development and utilization of new energy, especially renewable energy, is of great significance to the sustainable development of the national economy. Among them, the research, development and utilization of biogas are getting more and more attention. Biogas generally refers to manure, sewage, municipal solid waste and other biodegradable organic substances, which are produced by fermentation or anaerobic digestion in an oxygen-deficient environment. The gas mainly contains methane (55-65% ) and carbon dioxide (30-45%), as well as a small amount of nitrogen, oxygen and trace amounts of hydrogen sulfide. [0003] Although my country is rich in biogas resources, the utilization efficiency is not high, and it is mainly used for heating and lighting. In view of the part...

Claims

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Application Information

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IPC IPC(8): B01J23/755C01B32/05
CPCB01J23/755C01B3/40C01B2203/0238Y02P20/52
Inventor 余斐韩军詹宜秋张莉
Owner WUHAN UNIV OF SCI & TECH
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