Hydrogen-storage alloy producing high-pressure hydrogen

A hydrogen storage alloy and high-pressure hydrogen technology, applied in the production of hydrogen and other directions, can solve the problems of difficult activation and low hydrogen storage capacity of the alloy, and achieve the effect of easy activation

Inactive Publication Date: 2012-06-27
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiCr 2 and Ti(CrFe) 2 Although there is a high hydrogen release pressure, the hydrogen storage capacity of the alloy is too low (only 1wt%), and there are disadvantages of difficult activation

Method used

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  • Hydrogen-storage alloy producing high-pressure hydrogen
  • Hydrogen-storage alloy producing high-pressure hydrogen
  • Hydrogen-storage alloy producing high-pressure hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The chemical formula of the hydrogen storage alloy is Ti 0.9 Zr 0.1 Ce 0.1 Cr 1.0 Fe 0.8 Mo 0.1 V 0.1 , Calculate the amount of each metal added according to the chemical formula. Among the raw materials, the purity of Ti, Fe, Ce, and Mo is 99.5%, and the purity of Zr, Cr, and V is 99.9%. After the above raw materials are cleaned and dried, they are weighed according to the calculated addition amount, placed in a water-cooled copper crucible of a magnetic levitation furnace, and smelted under the protection of 0.05MPa argon after being evacuated to a vacuum degree of 0.895 Zr 0.102 Ce 0.096 Cr 1.01 Fe 0.802 Mo 0.101 V 0.097 , which is consistent with the chemical formula of the designed hydrogen storage alloy.

[0024] The hydrogen storage alloy ingot was taken out and broken into small pieces, and then put into the reactor for performance measurement. The hydrogen storage alloy does not require special activation treatment, and it is easy to absorb hydroge...

Embodiment 2

[0026] The chemical formula of the hydrogen storage alloy is Ti 0.95 Zr 0.05 La 0.05 Ce 0.05 Cr 1.3 Fe 0.8 V 0.2 , Calculate the amount of each metal added according to the chemical formula. Among the raw materials, the purity of La was 99.5%, and the purity of other metals was the same as in Example 1. After cleaning and drying, the raw materials are weighed according to the calculated addition amount, placed in a non-consumable electric arc furnace, evacuated to 0.13Pa, then smelted under the protection of 0.05MPa argon, and solidified and cooled in a water-cooled mold . In order to make the composition uniform, it needs to be smelted twice to obtain a hydrogen storage alloy. After chemical composition analysis, the chemical formula of the hydrogen storage alloy is Ti 0.945 Zr 0.051 La 0.0497 Ce 0.0496 Cr 1.30 Fe 0.802 V 0.197 , which is consistent with the chemical formula of the designed hydrogen storage alloy.

[0027] The method for measuring the propertie...

Embodiment 3

[0029] The chemical formula of the hydrogen storage alloy is Ti 0.7 Zr 0.3 La 0.05Cr 0.65 Fe 1.25 V 0.1 , Calculate the amount of each metal added according to the chemical formula. Raw material purity is the same as in Example 1 and Example 2. After cleaning and drying the raw materials, weigh them according to the amount added, and place them in the graphite crucible of the vacuum induction furnace. After evacuating and exhausting to a vacuum of 0.701 Zr 0.298 La 0.0498 Cr 0.649 Fe 1.250 V 0.098 , which is consistent with the chemical formula of the designed hydrogen storage alloy.

[0030] The performance measurement operation process of the hydrogen storage alloy is the same as that in Example 1. The P-C-T curve of the hydrogen storage alloy at 0°C is shown in image 3 . The hydrogen storage alloy does not require special activation treatment, and it is easy to absorb hydrogen when it comes into contact with 15MPa hydrogen for the first time (it starts to abso...

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Abstract

The invention discloses hydrogen-storage alloy producing high-pressure hydrogen. The alloy has a chemical general formula of Ti(1-a)ZraRbCrxFeyMz, wherein R is one or more selected from rare earth metal La, rare earth metal Ce, and mixed rare earth metal Mm; M is one or two selected from V and Mo elements; 1-a, a, b, x, y, and z are atomic ratios of Ti, Zr, R, Cr, and Fe to M; a is greater than 0 and no greater than 0.3; b is greater than 0 and no greater than 0.1; x is no smaller than 0.5 and no greater than 1.3; y is no smaller than 0.8 and no greater than 1.25; and z is greater than 0 and no greater than 0.3. The hydrogen-storage alloy can produce high-pressure hydrogen with a pressure of 40MPa under a temperature below 150 DEG C, and can produce high-pressure hydrogen with a pressure of 70MPa under a temperature below 180 DEG C. The temperatures are far lower than the temperatures required by corresponding hydrogen-emission pressures of common alloys such as TiFe and LaNi5. The alloy is easy to activate, and a maximal hydrogen storage amount of the alloy is higher than 1.8wt%, which is higher than that of the common alloy LaNi5.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a hydrogen storage alloy capable of producing high-pressure hydrogen. Background technique [0002] Hydrogen attracts attention for its outstanding advantages such as high combustion efficiency, clean combustion products, easy storage and low-cost transportation, and diverse uses. At present, the development and industrialization of fuel cells using hydrogen as fuel, especially the development of fuel cell electric vehicles, has become a global focus. At present, the main obstacle on the road to the industrialization of fuel cell vehicles is the solution of economical, safe and efficient on-board hydrogen source technology. With the rapid development of fuel cell electric vehicles, high requirements have been placed on the weight and volume hydrogen storage density of the on-board hydrogen storage system (the target requirement of the U.S. Department of Energy is 6wt%H ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C01B3/02
Inventor 王新华曹国洲刘海镇陈立新严密陈长聘
Owner ZHEJIANG UNIV
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