A high-pressure hydrogen storage alloy for hydrogen storage and its preparation method

A hydrogen storage alloy and high pressure technology, applied in the field of hydrogen storage materials, can solve the problems of inability to meet the hydrogen storage requirements of hydrogen refueling stations, unstable input and output, slow hydrogen charging and discharging rate, etc., achieve low enthalpy value, and reduce the number of openings , the effect of easily controllable conditions

Inactive Publication Date: 2020-10-09
PEKING UNIV
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Problems solved by technology

At the same time, various renewable energy sources have developed as the times require, including wind energy, solar energy, geothermal energy, tidal energy, biomass energy, etc., but the common problems of these renewable energy sources are: the instability of input and output and regional excess
[0004] The high-pressure hydrogen storage system of the hydrogen refueling station has a fast hydrogen charging and discharging rate, but the volumetric hydrogen storage density is low, while metal hydrides have a high hydrogen storage density and a slow hydrogen charging and discharging rate. In the prior art, high-pressure-metal hydride composite hydrogen storage is often used , to increase the volume hydrogen storage density and hydrogen charging and discharging rate, reduce the opening of the hydrogen compressor and reduce the failure rate of the hydrogen compressor
[0005] However, the hydrogen storage container of the hydrogen refueling station has a maximum pressure of 45MPa and 90Mpa due to different applications. Hydrogen Storage Requirements for Hydrogen Stations

Method used

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  • A high-pressure hydrogen storage alloy for hydrogen storage and its preparation method
  • A high-pressure hydrogen storage alloy for hydrogen storage and its preparation method
  • A high-pressure hydrogen storage alloy for hydrogen storage and its preparation method

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preparation example Construction

[0036] The second aspect of the present invention provides a method for preparing a high-pressure hydrogen storage alloy for hydrogen storage, the method comprising the following steps:

[0037] Step 1, weighing each metal raw material, then mixing;

[0038] Step 2, melting the mixed metals to obtain a hydrogen storage alloy.

[0039] The preparation method of the hydrogen storage alloy described in the present invention is further described in detail below.

[0040] Step 1, weighing each metal raw material, and then mixing.

[0041] According to a preferred embodiment of the present invention, each elemental metal is weighed according to the ratio of the general formula, wherein, the purity of each elemental metal is: Ti≥99.7%, Cr≥99.5%, and the purity of Fe, Mn and A is equal to ≥99.9%.

[0042] In a further preferred embodiment, the added amount of Mn is greater than the added amount calculated according to the ratio in the general formula, preferably, the added amount o...

Embodiment 1

[0079] (1) The general formula is Ti 1.02 Cr 1.00 Fe 0.70 mn 0.30 The alloy is the target alloy expected to be prepared. Weigh Ti: 2.500g, Cr: 2.660g, Fe: 2.001g, Mn: 0.931g according to the proportion of the general formula, wherein Mn is excessive, mix them together and put them into an electric arc furnace (U.S. Miller Electric Manufacturing Company), vacuumize to 10 -3 Below Pa, introduce 0.9atm argon gas to start smelting, turn over 3 times in total, and smelt for 1.5min each time;

[0080] Among them, the purity of each metal element is: Ti>99.7%, Cr>99.5%, Fe>99.9%, Mn>99.9%, Al>99.9%; the purity of argon is 99.99%;

[0081] (2) Take out the alloy after smelting and weigh its mass, which is 8.025g, which differs from the mass 8g of the target alloy by 0.025g, and its difference exceeds the predetermined range of the target alloy;

[0082] (3) Put the smelted alloy into the electric arc furnace and vacuumize to 10 -3 Below Pa, introduce 0.9atm argon gas, repeat the...

Embodiment 2

[0086] (1) The general formula is Ti 1.02 Cr 1.00 Fe 0.68 mn 0.30 Al 0.02 The alloy is the target alloy (8g) that is expected to be prepared. Weigh Ti: 2.507g, Cr: 2.670g, Fe: 1.950g, Mn: 0.951g, Al: 0.029g according to the proportion of the general formula, where Mn is excessive and mixed together Put it into an electric arc furnace (produced by Miller Electric Manufacturing Company in the United States), and evacuate to 10 -3 Below Pa, introduce 0.9atm argon gas to start smelting, turn over 3 times in total, and smelt for 1.5min each time;

[0087] Among them, the purity of each metal element is: Ti>99.7%, Cr>99.5%, Fe>99.9%, Mn>99.9%, Al>99.9%; the purity of argon is 99.99%;

[0088] (2) Take out the smelted alloy and weigh its mass, which is 7.990g, and the weight difference from the target alloy is within the range;

[0089](3) Put the above smelted alloy into a heat treatment furnace (Shanghai Chenxin Electric Furnace Co., Ltd., CXZW-20-20 or CXZG-0.5), and first v...

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Abstract

The invention discloses a high-pressure hydrogen storage alloy for hydrogen storage and a preparation method thereof. The hydrogen storage alloy comprises the compositions shown by the following general form: TiCrFe<y>Mn<c>A<x>, wherein A is one or more of Al, Ni or rare earth metal, a is greater than or equal to 1.00 and less than or equal to 1.05, b is greater than or equal to 0.90 and less than or equal to 1.10, c is greater than or equal to 0.20 and less than or equal to 0.40, x is greater than or equal to 0 and less than or equal to 0.1, and the value of y meets the following condition that (x+y) is greater than or equal to 0.65 and less than or equal to 0.75. The hydrogen storage alloy is easy to activate, has the high hydrogen storage capacity and hydrogenation and dehydrogenation plateau pressure, and is suitable for hydrogen storage at different hydrogenation stations with the maximum use pressure being 45-90 MPa.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a high-pressure hydrogen storage alloy suitable for hydrogen storage in hydrogen refueling stations and a preparation method thereof. Background technique [0002] Traditional non-renewable energy such as coal, oil, natural gas and other fossil fuels are consumed at an incredible speed with the progress of society. The shortage of energy and the resulting environmental pollution have plagued the entire human society. At the same time, various renewable energy sources have developed as the times require, including wind energy, solar energy, geothermal energy, tidal energy, biomass energy, etc., but the common problems of these renewable energy sources are: the instability of input and output and regional excess. Therefore, it is necessary to convert various renewable energy into a sustainable, stable storage, transportation and output energy. Hydrogen is a very good choi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C30/00C22F1/02
CPCC22C1/02C22C27/06C22C30/00C22F1/02C22F1/11
Inventor 李吉刚姜晓静武燕庆李栓李星国
Owner PEKING UNIV
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