Irreversible hydrogen-absorbing material, product and preparation method

A technology for hydrogen-absorbing materials and products, applied in chemical instruments and methods, and other chemical processes, can solve problems such as high melting point, poor safety, and complex structure

Inactive Publication Date: 2008-02-13
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is a product for use in high-temperature environments, in order to meet the requirements of high-temperature applications, the design of the two patents uses alkyne-containing condensed ring aromatic compounds with complex structures and high melting points. Therefore, although it is theoretically feasible, it is practical in engineering. There are still many problems in the application and realization of productization
For example, the proposed alkyne compounds are basically non-commercially available products, the synthesis process is complex, and the synthetic products are mostly homologue mixtures with a series of molecular weights, the yield is low, and the purification cost is high
In addition, in its disclosed hydrogen elimination formula, the catalyst is mostly selected as the highly toxic triphenylphosphine palladium, which makes the product less safe to use and difficult to meet environmental protection requirements
Therefore, these products are also very limited in practical applications

Method used

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  • Irreversible hydrogen-absorbing material, product and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1D

[0054] Example 1 Preparation of DEB-Pd / C irreversible hydrogen absorber composite powder material

[0055] Add 75g of organic alkyne compound DEB into 250ml of chloroform, stir at 75°C for 1h to form a homogeneous system, and obtain a uniformly dispersed DEB solution. In this solution, add 25g of Pd / C catalyst (Pd content 10%wt, the specific surface area of ​​gac support greater than 800m 2 g -1 , particle size 80 ~ 40 mesh), continue to stir at 70 ° C for 2 hours to obtain a uniformly dispersed mixed solution. Put this mixture into an ultrasonic generator with a frequency of 28kHz and a power of 100W for ultrasonic treatment for 15min. The mixture after ultrasonic treatment was stirred in an open environment at 85° C. for 5 h to evaporate the solvent to obtain a primary complex. This primary complex at 100°C, 10 -2 After vacuum drying for 24h under pa condition, DEB-Pd / C irreversible hydrogen absorber composite powder material was obtained. After testing, the microscopic...

Embodiment 2

[0056] Embodiment 2DPBD-Pt / BaSO 4 Preparation of Irreversible Hydrogen Absorber Composite Powder Material

[0057] Add 20 g of organic alkyne compound DPBD into 350 ml of n-hexane / tetrahydrofuran mixed solution with a volume ratio of 1:1, and stir at 75° C. for 1.5 h to form a uniformly dispersed homogeneous solution system. Add 80 g of Pt / BaSO4 activated with flowing hydrogen at 100°C to the solution 4 Catalyst (Pt content 3%wt, BaSO 4 The specific surface area is greater than 5m 2 g -1, the particle size is 80-100 mesh), and the stirring is continued at 65° C. for 3 h to obtain a uniformly dispersed mixed solution. Put this mixture into an ultrasonic generator with a frequency of 45kHz and a power of 80W for 30min. After the ultrasonically treated mixture was stirred in an open environment at 65°C to evaporate the solvent, the primary complex was obtained. This primary complex at 85°C and 10 -2 Vacuum drying treatment under pa conditions, to obtain DPBD-Pt / BaSO 4 Irr...

Embodiment 3

[0058] Example 3 Packed TEB-Pd-Ru / γ-Al 2 o 3 Preparation of Irreversible Hydrogen Absorber Composite Powder Material Products

[0059] Add 30 g of organic alkyne compound TEB into 400 ml of tetrahydrofuran, and stir for 1 h at 80° C. to form a uniformly dispersed homogeneous system solution. Add 70g of Pd-Ru / γ-Al activated by flowing hydrogen at 250°C to the solution 2 o 3 Catalyst (Pd and Ru mass percentages are respectively 4% and 1%, γ-Al 2 o 3 The specific surface area is greater than 250m 2 g -1 , with a particle size of 100-80 mesh), and continued stirring at 90°C for 0.5h to obtain a uniformly dispersed mixed solution. Put this mixture into an ultrasonic generator with a frequency of 100 kHz and a power of 100 W for ultrasonic treatment for 20 min. The mixture solution after ultrasonic treatment was stirred in an open environment at 75° C. for 6 h to evaporate the solvent, and the primary complex was obtained. This primary complex at 120°C, 10 -2 After vacuum ...

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Abstract

The present invention provides an irreversible hydrogen-absorbing material, product and preparation method. The hydrogen-absorbing material contains an organic compound with unsaturated bond and an organic hydrogenation catalyst, and the organic compound is an organic acetylide, which contains at least two alkyne bonds structures. The organic acetylide is uniformly sedimentated on the surface of the catalyst or uniformly mixed to be prepared and obtained by the complex methods of recrystallization loading, physical gas phase sedimentating or mechanical alloying etc. The material is mixed with a macromolecular material such as rubber or plastic to be prepared as a porous-structural material product with an irreversible hydrogen-absorbing function in various forms such as a film, an adhesive tape, a capsule etc, which can meet the requirements of various fields and / or use purposes, and the product is safe and convenient, which has good environmental compatibility and good storage stability. The high-dose prompt and irreversible hydrogen-absorbing function of the product can promptly eliminate the potential danger caused by high-concentration hydrogen such as a hydrogen leakage etc, and can as well as eliminate medium and low-concentration hydrogen in the closed system, so as to realize engineering application purposes of hydrogen-eliminating, hydrogen-control, keeping a high vacuum degree etc.

Description

technical field [0001] The invention relates to a hydrogen absorbing material, a product and a corresponding preparation method for absorbing and eliminating hydrogen in a closed system, especially absorbing hydrogen in the form of an irreversible hydrogenation reaction, and effectively controlling the hydrogen concentration. Background technique [0002] The special hydrogen absorption function possessed by hydrogen absorbing materials has been widely used in various industrial fields. It can be used in various vacuum devices to increase and maintain the vacuum in the device and prolong the service life of the device; it can be used in gas-filled containers to improve gas purity; it can also be used in important sealing devices to protect electronic devices in them from hydrogen corrosion ; Used for the transportation of hydrogen and its isotopes to reach the necessary safety limits; it can also be used to protect uranium-rich metal fuels from being corroded by hydrogen; us...

Claims

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Application Information

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IPC IPC(8): B01J20/22
Inventor 黄渝鸿黄琨郭静刘晓艰张凯黄远红谭云吴菊英范敬辉
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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