Solar energy thermal utilization vacuum pipe hydrogen absorption material and using method thereof

A technology of hydrogen absorption material and solar heat, which is applied in the direction of using solid contact hydrogen separation, hydrogen separation, energy input, etc., can solve the problems of low hydrogen absorption rate and capacity of alloys, difficult to meet, and achieve fast hydrogen absorption rate and manufacturing process. Simple, low activation temperature effect

Active Publication Date: 2012-12-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen absorption rate and capacity of the above-mentioned alloys are relatively low, and high temperatures above 450°C are required for activation, which is difficult to meet the requirements of medium and high temperature solar vacuum heat collectors. Fast hydrogen absorbing materials to meet the high vacuum requirements of high temperature heat utilization vacuum tubes in solar energy

Method used

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  • Solar energy thermal utilization vacuum pipe hydrogen absorption material and using method thereof
  • Solar energy thermal utilization vacuum pipe hydrogen absorption material and using method thereof
  • Solar energy thermal utilization vacuum pipe hydrogen absorption material and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw materials are Ti (purity ≥ 99.5%), VFe (V content is 50%), Y (purity ≥ 99.5%), and the alloy is Ti 75 (VFe) 24.5 Y 0.5 Stoichiometric (i.e. according to Ti: 75wt%, VFe: 24.5wt%, Y: 0.5wt%, the same below), prepared by ordinary medium frequency induction vacuum smelting method, the smelted ingot is broken and ground under the protection of argon into - After the 100-mesh particle powder, take 0.32g and press it into a small piece of Ф6×3mm. According to GB / T 8763-1988, test the relationship between the hydrogen absorption rate and capacity of the alloy piece at room temperature as a function of time. For comparison, the Zr-V-Fe (Zr: 70wt%, V: 24.6wt%, Fe: 5.4wt%) alloy was smelted by the same process and pressed into small pieces of Ф6×3mm, and the hydrogen absorption performance was compared under the same conditions test. The test conditions are: the sample is at 450°C, better than 5×10 -3 Activation under Pa vacuum for 10 minutes, working temperature 25°C,...

Embodiment 2

[0022] The raw materials are Ti (purity ≥ 99.5%), VFe (V content 80%), Mn (purity ≥ 98%), Y (purity ≥ 99.5%), and the alloy is based on Ti 51.5 (VFe) 36.5 mn 10.5 Y 1.5 Stoichiometric, prepared by ordinary medium-frequency induction vacuum melting method, the melted ingot is crushed, and ground into -100 mesh particle powder under the protection of argon. Take 0.32g and press it into a small piece of Ф6×3mm. According to GB / T 8763-1988, test the relationship between the hydrogen absorption rate and capacity of the alloy piece at room temperature as a function of time. Alloy flakes are better than 5×10 -3 Pa vacuum, activation at 200°C for 30 minutes. Test working pressure 2.7×10 -4 Pa, test results such as figure 2 Shown, visible, Ti 51.5 (VFe) 36.5 mn 10.5 Y 1.5 Alloy 25℃ to H 2 Hydrogen absorption rate S at 10 minutes 10 (cm 3 ·S -1 g -1 ) is 1491.7cm 3 ·S -1 g -1 , the hydrogen absorption rate is basically kept constant within 120 minutes, and the hydroge...

Embodiment 3

[0024] The raw materials are Ti (purity ≥ 99.5%), VFe (V content 80%), Mn (purity ≥ 98%), Y (purity ≥ 99.5%), and the alloy is based on Ti 30 (VFe) 46.5 mn 21 Y 2.5 Stoichiometric, prepared by ordinary medium-frequency induction vacuum melting method, the melted ingot is crushed, and ground into -100 mesh particle powder under the protection of argon. Take 0.32g and press it into 100 small pieces of Ф6×3mm size, take one of them randomly, and test the relationship between the hydrogen absorption rate and capacity of the alloy piece at room temperature according to GB / T 8763-1988. The test conditions are: the sample is better than 5×10 -3 Pa vacuum, activation at 450°C for 10 minutes, working temperature at 25°C, working pressure at 2.7×10 -4 Pa, test results such as image 3 As shown, Ti 30 (VFe) 46.5 mn 21 Y 2.5 alloy at 25°C for H 2 Hydrogen absorption rate S at 10 minutes 10 (cm 3 ·S -1 g -1 ) and hydrogen absorption capacity Q at 120 minutes 120 (cm 3 ·Pa·g...

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Abstract

The invention relates to a solar energy thermal utilization vacuum pipe hydrogen absorption material and a using method thereof. The hydrogen absorption material comprises the following ingredients in parts by weight: 30-79 parts of titanium, 20-69.5 parts of vanadium iron alloy, 0.5-2.5 parts of rare earth metal and 0.5-47.5 parts of transitional metal, wherein the rare earth metal is single Y, La or Ce or a mixture of Y, La and Ce according to any proportion, and the transitional metal is one or a mixture of two or more of Mn, Co, Cr, Ni, Zr, Nb or Hf according to any proportion. The using method comprises the following steps of: heating the hydrogen absorption material to 200-450 DEG C under the vacuum condition, activating for 10-30min and then cooling to the working temperature and carrying out hydrogen absorption, wherein the working temperature is 25-350 DEG C. The hydrogen absorption material has the remarkable advantages of simple manufacturing process, low activation temperature, large hydrogen absorption volume, high hydrogen absorption speed, and the like.

Description

technical field [0001] The invention relates to a vacuum tube hydrogen absorbing material for solar heat utilization and its use method, in particular to a solar heat utilization vacuum tube titanium-based multi-component hydrogen absorbing material and its use method. ~250°C, can replace Zr-Co-Re, Zr-V-Fe, barium-based and strontium-based hydrogen absorbing materials in vacuum tubes for solar thermal utilization. Background technique [0002] Solar thermal utilization has been widely popularized. In recent years, with the development of medium and high temperature solar thermal technologies such as building energy saving and solar thermal power generation, higher and higher requirements have been put forward for the heat collection efficiency of vacuum heat collecting tubes. The working temperature of medium and high temperature solar vacuum heat collector tubes is as high as 200-400°C. At this temperature, the heat transfer medium in the heat collector tube will be cracked...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C01B3/56
CPCY02P20/133
Inventor 李志念王树茂刘晓鹏蒋利军郝雷吕芳李国斌
Owner GRIMAT ENG INST CO LTD
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