Application of a Nickel-Based Skeleton Metal Catalyst in Hydrazine Decomposition to Hydrogen Production

A framework metal and catalyst technology, which is applied in the application field of nickel-based framework metal catalysts in hydrazine decomposition hydrogen production, can solve the problems of slow hydrogen production, low catalytic activity, and influence on separation steps, and achieve less by-products and hydrogen selection The effect of high stability and simple preparation method

Active Publication Date: 2017-03-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the selectivity of hydrazine decomposition hydrogen production on the above-mentioned non-noble metal catalysts is high, the catalytic activity of nanoparticles and composite oxides is generally low, and the hydrogen production rate is relatively slow; A small amount of NH 3 still affect subsequent separation steps

Method used

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  • Application of a Nickel-Based Skeleton Metal Catalyst in Hydrazine Decomposition to Hydrogen Production
  • Application of a Nickel-Based Skeleton Metal Catalyst in Hydrazine Decomposition to Hydrogen Production
  • Application of a Nickel-Based Skeleton Metal Catalyst in Hydrazine Decomposition to Hydrogen Production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Nickel-based Skeleton Metal Catalysts

[0025] The catalyst precursor is Ni 50-x al 50-y m x+y , 0≤x≤10, 0≤y≤10 alloys, crushed into 20-300 mesh, added to 5.00mol L -1 In the NaOH solution, stir, the water bath temperature is controlled at 80 ℃, and the reaction time is 3h. After the reaction, the catalyst is repeatedly washed with deionized water until the washing solution is neutral, and then separated by a magnet to obtain a nickel-based skeleton metal catalyst. When x and y are 0 respectively and the alloy powder is 40 mesh, Raney Ni-40 is obtained. When x and y are respectively 0 and the alloy powder is 300 mesh, a Raney Ni-300 catalyst is obtained. When x=2, y=0, and M is Pt, a Raney Ni-Pt catalyst is obtained; when x=1, y=1, and M is W, a Raney Ni-W catalyst is obtained.

Embodiment 2

[0027] Application of Nickel-Based Skeleton Metal Catalysts in Decomposition of Hydrazine

[0028] This reaction was carried out in a closed drainage system, and the experimental process was as follows: first, 4 mL of deionized water and 0.1 g of catalyst were added to the three-necked bottle, and then the system was sealed; then, 0.50 ml of hydrazine hydrate solution was injected into the above-mentioned three-necked bottle, Get an initial concentration of 0.10-0.45mol L -1 The hydrazine solution starts timing simultaneously, and the reaction temperature is between 0-100°C. The gas produced by the catalytic decomposition of hydrazine first passes through the hydrochloric acid absorption device to convert the possible by-product NH 3 Absorption, ensuring that only hydrogen and nitrogen remain. The product gas is collected, the activity of the reaction is calculated by reading the gas production per unit time, and the selectivity of the reaction is calculated by reading the c...

Embodiment 3

[0030] Catalytic Activity Test of Hydrazine Hydrate Decomposition with Different Alkali Concentrations

[0031] Using the single active center Raney Ni-300 catalyst prepared in Example 1, add different amounts of NaOH respectively so that its initial concentration in the reaction solution is 0.01-5.00mol L -1 , to obtain Raney Ni-300+NaOH catalytic system, and used in the hydrogen production reaction of hydrazine hydrate decomposition described in Example 2.

[0032]The activity test results of different catalysts are compared, as shown in Table 1.

[0033] Table 1 Test results of hydrazine decomposition hydrogen production of different catalysts (30°C, initial hydrazine concentration is 0.32mol L -1 )

[0034]

[0035]

[0036] It can be seen from Table 1 that the 300-mesh single-active center skeleton nickel catalyst has a selectivity of up to 83% for hydrogen production by decomposition of hydrazine hydrate at room temperature, which is much higher than that of the ...

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Abstract

The invention relates to the application of a nickel-based skeleton metal catalyst in the preparation of hydrogen by decomposing hydrazine. Specifically, nickel-containing framework metals are used as catalysts to rapidly decompose hydrazine or hydrazine aqueous solutions of different concentrations to obtain hydrogen and nitrogen under the condition of 0-100°C basic additives, and the selectivity of hydrogen exceeds 99%. The catalyst raw material of the invention is easy to obtain, the preparation process is simple, and the invention has the advantages of high hydrogen production efficiency, few by-products, easy recovery of the catalyst, low cost and the like, and has potential application prospects.

Description

technical field [0001] The invention relates to the application of a nickel-based skeleton metal catalyst in the decomposition of hydrazine to produce hydrogen, in particular to a method for preparing hydrogen by using the nickel-based skeleton metal to catalyze the decomposition of hydrazine or hydrazine aqueous solution. Background technique [0002] As a clean energy, hydrogen has many advantages such as cleanliness, high efficiency, and diversified application forms, so it has always attracted attention. The safe storage and transportation of hydrogen is one of the technical bottlenecks hindering the development of hydrogen energy, especially the storage of hydrogen on mobile devices has always been an important research topic. At present, research on hydrogen storage materials mainly focuses on two aspects, one is physical hydrogen storage, such as using high-pressure hydrogen storage tanks, new high-capacity hydrogen storage materials, etc.; the other is using chemical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J25/02C01B3/04
CPCY02E60/36
Inventor 黄延强贺雷张涛王晓东王爱琴
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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