Hydrogen storage composite formed article and method for preparing the same

A technology for composite moldings and hydrogen absorbing materials, applied in chemical instruments and methods, hydrogen, and other chemical processes, etc., can solve the problems of poor gas transmission performance, slow gas release speed, poor elasticity, etc., and achieve high desorption efficiency. The effect of widening the range and preventing chalking

Inactive Publication Date: 2002-02-20
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molded articles using such fluorocarbon resins have problems of poor elasticity as an adsorbent material and slow gas release rate due to poor gas transport performance.

Method used

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  • Hydrogen storage composite formed article and method for preparing the same
  • Hydrogen storage composite formed article and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In an argon atmosphere, a hydrogen-absorbing alloy ingot (designated the following combination of 34 wt% La, 45 wt% Ce, 6 wt% Pr and 15 wt% ( When the atomic ratio of Nd is 1.0, it also contains 3.75Ni, 0.75Co, 0.20Mn and 0.30Al in atomic ratio) for heat treatment to prepare a uniform hydrogen-absorbing alloy ingot. The obtained alloy ingot was roughly pulverized in a nitrogen atmosphere. In addition, pulverization was carried out with a Brown mill to prepare a powder having a particle size of 1 mm or less, which was a raw material for jet milling in the next step. Also, according to the present invention, in a nitrogen atmosphere, 5.8 kgf / cm 2 The hydrogen-absorbing alloy is dry-pulverized by a jet mill under the gas pressure of 100 % to obtain a hydrogen-absorbing alloy fine powder with an average particle size of 6 microns and a particle size distribution width of 1-30 microns. Then, about 2.6 g of the pulverized fine powder was placed in a metal mold and molding w...

Embodiment 2

[0054] The hydrogen-absorbing alloy molded body that had been prepared in a similar manner to Example 1 was placed in a toluene solution containing 20% ​​by weight of a silicone resin, and degassed for a predetermined time. The silicone resin used is KE45TS provided by Shin-Etsu Chemical Co. Ltd., which is a liquid type and deoxime type condensation-curing silicone resin, containing as a main component a dimethicone containing silanol at both ends. Methyl polysiloxane (viscosity of 20,000 centipoise), and hardness of 20, elongation of 300%, and tensile strength of 2.0 Mpa. After it was confirmed that the molded body had been soaked for 1 hour to sufficiently penetrate the inside of the molded body with the binder solution, the molded body was taken out. Then, the molded body was subjected to condensation curing for up to 7 days in an atmosphere to prepare a hydrogen-absorbing molded body containing a silicone resin. The amount (solid content) of the impregnated binder was abo...

Embodiment 3

[0056] In an argon atmosphere, various elements weighed out to prepare the same alloy composition as in Example 1 were melted, and then the melted metal maintained at 1450°C was passed through a zirconia nozzle (pore size: 5 mm) onto a rotating disk made of boron nitride. The obtained spherical atomized powder of the hydrogen-absorbing alloy was mixed with a silicone resin (KE1820, supplied by Shin-Etsu Chemical Co. Ltd.) at a weight ratio of 9:1. In this case, in order to achieve good mixing, the silicone resin has been diluted in toluene in advance so that its concentration is 40% by weight. After the toluene was removed by drying in the atmosphere, 1 g of the mixture obtained was placed in a ring-shaped metal mold having a diameter of 10 mm, and molding was performed under a pressure of 715 Mpa. Then, the obtained molded body was thermally cured at 120° C. for 2 hours in argon gas to prepare a hydrogen-absorbing molded body containing a silicone resin. The impact resilien...

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Abstract

The present invention relates to a hydrogen absorbing composite compact comprising silicone resin, and a process for making the compact, the compact being without particle size reduction or decay even when absorptions and desorptions of hydrogen are repeated for a long period of time and excelling in heat resistance, moldability and processibility. More particularly, the present invention provides a hydrogen absorbing composite compact which comprises hydrogen absorbing alloy and preferably 0.5 to 50% by weight silicone resin. Furthermore, the present invention provides a process for making the hydrogen absorbing composite compact comprising a step wherein a hydrogen absorbing alloy powder is molded by compression, a step for impregnation in a silicone resin solution or dispersion liquid and a sep for curing, and a process for making the hydrogen absorbing composite compact comprising a step for mixing a hydrogen absorbing alloy with any one selected from silicone resin itself, a silicone resin solution and a silicone resin dispersion liquid, a step for molding and a step for curing.

Description

technical field [0001] The present invention relates to a hydrogen-absorbing composite molded body comprising a silicone resin and a method for producing the molded body, and, more particularly, to a hydrogen-absorbing composite molded body comprising a hydrogen-absorbing material and a silicone resin binder A composite molded body whose particle size does not decrease or change when hydrogen adsorption and desorption are repeated for a long time, and also relates to a production method of the composite molded body. Background technique [0002] Hydrogen-absorbing alloys have been gradually used as hydrogen separation or purification materials, catalysts, sensors, etc., as well as hydrogen-absorbing materials for stationary storage tanks, hydrogen sources for fuel cells and hydrogen-fueled vehicles, and in the use of hydrogen adsorption and hydrogen absorption. Endothermic and exothermic properties upon desorption of energy conversion materials in heat storage systems, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/00B01J20/30C01B3/00C08K3/08H01M8/06
CPCH01M8/065B01J20/20B01J20/262B01J20/00B01J2220/46C08K3/08Y02E60/50Y02E60/327B01J20/0203C01B3/0078B01J20/30Y02E60/32Y02P70/50C08L83/04C08J5/12
Inventor 中野瑞浜谷典明岛聪
Owner SHIN ETSU CHEM IND CO LTD
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