Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nickel-base metal catalyst for preparing hydrogen by hydrazine decomposition at room temperature, as well as preparation and application thereof

A catalyst and base metal technology, applied in the field of nickel-based metal catalysts and their preparation, can solve the problems of low catalytic activity and slow hydrogen production rate, and achieve the effects of high catalytic activity and selectivity, easy separation and high stability

Active Publication Date: 2012-08-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the selectivity of hydrazine decomposition for hydrogen production on composite oxide and nanoparticle catalysts is high, the catalytic activity is relatively low due to the nature of the material, and the hydrogen production rate is relatively slow.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel-base metal catalyst for preparing hydrogen by hydrazine decomposition at room temperature, as well as preparation and application thereof
  • Nickel-base metal catalyst for preparing hydrogen by hydrazine decomposition at room temperature, as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of single-site catalysts

[0031] Weigh 11.77g nickel nitrate (Ni(NO 3 ) 3 ·6H 2 O) and 5.06g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) was dissolved in 50mL deionized water to make solution A. Take by weighing 4.29g anhydrous sodium carbonate (Na 2 CO 3 ) was dissolved in 30 mL of deionized water and mixed with 20 mL of 3M NaOH solution to obtain solution B. Solution B was placed in a water bath at 35°C, and solution A was added to it at a rate of 3 mL / min under vigorous stirring, and a small amount of NaOH solution was added to adjust the pH to 10. The precipitate was crystallized in a 65°C water bath for 18h. After filtering and washing, the samples were dried at 80°C. XRD results confirmed that a hydrotalcite structure was formed, and its BET surface area was: 264.3m 2 / g. The above hydrotalcite precursor was heated at 500 °C in 10% H 2 / He atmosphere for 1 h to obtain a single-site catalyst.

Embodiment 2

[0033] Preparation of dual-site catalysts

[0034] 1 g of the nickel-aluminum hydrotalcite prepared in Example 1 was redispersed in 100 mL of deionized water to make a suspension, and stirred in a water bath at 65° C. for 4 h. Accurately measure the H required for a precious metal loading of 4wt% 2 IrCl 4 solution, H 2 PtCl 6 solution, RhCl 3The solution is slowly added dropwise to the above suspension, and 2.5-5g of urea is added as a precipitating agent. Then the temperature was raised to 90°C in a water bath and kept for 16h. After filtering and washing, the samples were dried at 80° C. to obtain a series of catalyst precursors loaded with precious metals. Weigh 0.1g of catalysts loaded with different precious metals, 2 / He reduction for 1 h to obtain a dual-site catalyst.

Embodiment 4

[0039] Catalyst Activity Test

[0040] Catalyst evaluations of the present invention were performed in a closed drainage system. The experimental process is as follows: the reaction is carried out in a constant temperature water bath, and 4 mL of deionized water and catalyst are added to a three-necked flask. The catalyst prepared in embodiment 1 is Ni-Al-HT (HT: hydrotalcite), the catalyst prepared in embodiment 2 is X-Ni-Al-HT (X is Pt, Ir, Rh, Ru, Au), comparative example 3 The prepared catalyst is Ni-Al 2 o 3 -Imp. Then inject hydrazine hydrate in the above-mentioned three-necked bottle, and start timing simultaneously. The volume concentration of hydrazine hydrate used in the test is 13.65%. The gas generated by the catalytic decomposition of hydrazine is absorbed by the hydrochloric acid absorption device, and the rest is only hydrogen and nitrogen. The selectivity of the reaction can be calculated by reading the gas production. The activity test results of catalys...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a catalyst for hydrogen production reaction by hydrazine decomposition at the room temperature, and a preparation method of the catalyst, in particular to a single-active center and double-active center catalyst prepared by taking nickel-containing hydrotalcite as a precursor, and a preparation method of the catalyst. The catalyst comprises X / M-N, wherein the load capacity of precious metal X (Pt, Ir, Rh, Au, Pd or Ru) is 0-30wt%, the load capacity of metal M (Ni, Co, Mg or Cu) is 10-80wt%, and N (Al, Fe or Mn) is oxide. The catalyst has the characteristics of being high in reaction activity and good in selectivity, and leads hydrazine to be quickly decomposed at the room temperature so as to prepare hydrogen, wherein the highest selectivity reaches 100%. The invention also provides a method for preparing clean hydrogen which does not contain CO. The catalyst is easy in obtaining of raw materials and simple in technology, thus having good application prospect.

Description

technical field [0001] The invention relates to a catalyst for hydrogen production by decomposing hydrazine, in particular to a nickel-based metal catalyst used for decomposing pure hydrazine or hydrazine hydrate to produce hydrogen at room temperature and a preparation method thereof. Background technique [0002] Optimizing the energy structure and developing and utilizing efficient and clean conversion technologies are important ways to solve the energy crisis. Hydrogen has always been a secondary energy carrier that has attracted much attention, with many advantages such as cleanliness, high efficiency, and diverse application forms. The hydrogen source is one of the technical bottlenecks hindering the development of hydrogen energy, and the development of mobile hydrogen sources has always been an important research direction. At present, there are two main solutions. One is to develop hydrogen storage technology, such as using high-pressure hydrogen storage tanks, new...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/89C01B3/04
CPCY02E60/364Y02E60/36
Inventor 张涛贺雷黄延强王晓东王爱琴
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com