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Preparation method of fixed bed raney nickel catalyst

A catalyst and fixed bed technology, which is applied in the field of preparation of high-activity Raney catalysts, can solve problems such as uneven catalytic activity, low catalyst activity, and limited application, and achieve uniform distribution of catalytic activity, good catalytic activity, and reduced production costs. Effect

Active Publication Date: 2012-09-05
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity of the catalyst prepared by this patent is low, and the catalytic activity of each part is not uniform, which also limits the practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ① Soak the nickel foam in acetone for 10 minutes, wash it with dilute hydrochloric acid solution, then wash it with water, and dry it in vacuum at 60°C for 120 minutes;

[0023] ②Heat the metal aluminum powder to 660°C in a nitrogen atmosphere to melt it completely, then immerse the nickel foam obtained in step ①, keep the temperature at 660°C, take it out after immersion for 0.5h, and cool naturally to room temperature to obtain the plated aluminum powder. Aluminum nickel foam;

[0024] ③ The aluminized nickel foam obtained in step ② is leached in 10wt% sodium hydroxide at a temperature of 60° C. for 12 hours to obtain the product.

[0025] The catalytic conversion rate of the prepared fixed-bed Raney nickel catalyst was evaluated to be 82%.

Embodiment 2

[0027] ① Soak the nickel foam in ethanol for 60 minutes, wash it with dilute sulfuric acid solution, then wash it with water, and dry it in vacuum at 80°C for 10 minutes;

[0028] ②Heat the metal aluminum wire to 700°C in a helium atmosphere to melt it completely, then immerse the nickel foam obtained in step ①, keep the temperature at 700°C, take it out after immersion for 1 hour, and naturally cool to room temperature to obtain the plated nickel wire. Aluminum nickel foam;

[0029] ③ The aluminized nickel foam obtained in step ② is leached in 20wt% sodium hydroxide at a temperature of 65° C. for 12 hours to obtain the product.

[0030] The catalytic conversion rate of the prepared fixed-bed Raney nickel catalyst is 85% through activity evaluation.

Embodiment 3

[0032] ① Soak the nickel foam in benzene for 100 minutes, wash it with dilute phosphoric acid solution, then wash it with water, and dry it in vacuum at 100°C for 60 minutes;

[0033] ②Heat the metal aluminum strip to 750°C in a neon gas atmosphere to melt it completely, then immerse the nickel foam obtained in step ①, keep the temperature at 750°C, take it out after immersion for 2 hours, and cool naturally to room temperature to obtain the plated nickel strip. Aluminum nickel foam;

[0034] ③ The aluminized nickel foam obtained in step ② is leached in 30wt% sodium hydroxide at a temperature of 85° C. for 4 hours to obtain the product.

[0035] The catalytic conversion rate of the prepared fixed-bed Raney nickel catalyst can be evaluated as 90% through activity evaluation.

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Abstract

The invention discloses a preparation method of fixed bed raney nickel catalyst, comprising the following steps of: putting foamed nickel into an organic solvent for soaking for 10 to 120 minutes, then cleaning the foamed nickel by a diluted acid solution, and then washing and drying; heating metallic aluminium to 660 to 800 DEG C under inert atmosphere so as to be completely melt, then immerging the obtained foamed nickel in the melted metallic aluminium, with the temperature of being kept to be 660 to 800 DEG C, and taking out the foamed nickel after being immerged for 0.5 to 6 hours, and naturally cooling to room temperature, namely obtaining aluminium-plated foamed nickel; and immerging the obtained alumunium-plated foamed nickel in a sodium hydroxide or potassium hydroxide solution, thus obtaining the catalyst. The fixed bed raney nickel catalyst prepared by the method has the advantages of high strength, good catalytic activity, uniform activity of the catalyst and good repetitiveness. The invention belongs to the field of catalyst preparation.

Description

technical field [0001] The invention relates to a preparation method of a fixed-bed Raney catalyst, in particular to a preparation method of a high-activity Raney catalyst. Background technique [0002] Hydrogen energy is a future energy development direction proposed by human society to alleviate resource and environmental problems. The core content of this development is to replace existing fossil fuels (coal, oil and natural gas) with hydrogen as a clean, green and portable transport fuel. The fuel cell using hydrogen as fuel is an efficient and clean power generation device, and has gradually become an ideal supporting power source for portable electronic products and electric vehicles. At present, the main problem restricting the development and application of fuel cells is the storage of hydrogen. However, the hydrogen storage methods widely used today have low hydrogen storage capacity, such as hydrogen storage in high-pressure gas cylinders and hydrogen storage allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J25/02B01J35/04C01B3/06
CPCY02E60/36
Inventor 肖钢李贺王玉晓侯晓峰
Owner HANERGY TECH
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