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Preparation method of fixed-bed Raney nickel catalyst

A Raney nickel and catalyst technology, which is applied in the field of preparation of high-activity Raney catalysts, can solve the problems of low catalyst activity, non-uniform catalytic activity, limited application and the like, achieve good catalytic activity, uniform catalytic activity distribution, and reduce production costs Effect

Active Publication Date: 2009-09-23
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

[0025] 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;

[0026] ②Use the aluminum sheet as the anode, the nickel foam obtained in step ① as the cathode, and the inorganic molten salt as the electrolyte, at a temperature of 100°C and a current density of 2A / dm 3 Electroplating is carried out under certain conditions, and the electroplating time is 20 minutes to obtain aluminum-plated nickel foam;

[0027] ③ The aluminized nickel foam obtained in step ② is roasted at 700°C for 1 hour under the protection of nitrogen, and then leached in 10wt% sodium hydroxide at 60°C for 12 hours to obtain the product.

[0028] Wherein the inorganic molten salt in step 2. is AlCl 3 , NaCl and KCl mixture, the mixing ratio is AlCl 3 80 parts by weight, 5 parts by weight of NaCl, 5 parts by weight of KCl; AlCl before mixing 3 , NaCl and KCl were dried at 400°C for 6 hours to...

Embodiment 2

[0031] 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;

[0032] ②Use the aluminum sheet as the anode, the nickel foam obtained in step ① as the cathode, and the inorganic molten salt as the electrolyte, at a temperature of 130°C and a current density of 1A / dm 3 Electroplating is carried out under certain conditions, and the electroplating time is 40 minutes to obtain aluminum-plated nickel foam;

[0033] ③ The aluminized nickel foam obtained in step ② is roasted at 600°C for 0.8h under the protection of helium, and then leached in 20wt% sodium hydroxide at 70°C for 6h.

[0034] Wherein the inorganic molten salt in step 2. is AlCl 3 and NaCl mixture, the mixing ratio is AlCl 3 50 parts by weight, 20 parts by weight of NaCl; AlCl before mixing 3 and NaCl were dried at 450°C for 5 hours to remove moisture and impurities.

[0035] The activity evaluation of the ...

Embodiment 3

[0037] 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;

[0038] ②Use the aluminum sheet as the anode, the nickel foam obtained in step ① as the cathode, and the inorganic molten salt as the electrolyte, at a temperature of 160°C and a current density of 10A / dm 3 Electroplating is carried out under certain conditions, and the electroplating time is 10 minutes to obtain aluminum-plated nickel foam;

[0039] ③ The aluminized nickel foam obtained in step ② is roasted at 800°C for 0.5h under the protection of neon gas, and then leached in 30wt% sodium hydroxide at 80°C for 8h to obtain the product.

[0040] Wherein the inorganic molten salt in step 2. is AlCl 3 , NaCl and KCl mixture, the mixing ratio is AlCl 3 30 parts by weight, 16 parts by weight of NaCl, 20 parts by weight of KCl; AlCl before mixing 3, NaCl and KCl were dried at 500°C for 4 hours to remove...

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Abstract

The invention discloses a preparation method of a fixed-bed Raney nickel catalyst, comprising the following specific steps: nickel foam is cleaned by diluted acid solution after being put in an organic solvent to be soaked for 10-120 min, and then is dried after being washed by water; the plating is carried out at a temperature of 80 DEG C to 200 DEG C, with the current density of 1-10A / dm<3> for 10-60 min, and then the aluminized nickel foam is obtained by taking an aluminum sheet as an anode, the nickel foam as a cathode and fuse salt as electrolyte; and the obtained aluminized nickel foam is calcined under the protection of inert gas at a temperature of 600 DEG C to 1100 DEG C for 0.5-3h, and then is leached in a sodium hydroxide or potassium hydroxide solution to obtain the Raney nickel catalyst. The fixed-bed Raney nickel catalyst has the advantages of high strength, good catalytic activity, uniform catalytic activity and good repeatability and 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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IPC IPC(8): B01J25/02
Inventor 肖钢李贺王玉晓
Owner HANERGY TECH
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