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A method for recovering hydrogen isotopes from hydrogen isotope lithium compounds

A technology for hydrogen isotopes and lithium compounds, which is applied in the field of hydrogen isotope recovery and hydrogen isotope recovery, can solve the problems of low operating temperature, short time and high operating temperature, and achieve the effect of low operating temperature, short time and improving safety factor.

Active Publication Date: 2018-11-27
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can effectively solve the problem that the operating temperature of the existing method is too high, and the operation is simple, the effect is obvious, the operating temperature is low, and the time is short. , improve the safety factor, protect the environment, and promote the development and application of hydrogen isotope fuel technology, which has important practical and progressive significance

Method used

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  • A method for recovering hydrogen isotopes from hydrogen isotope lithium compounds
  • A method for recovering hydrogen isotopes from hydrogen isotope lithium compounds
  • A method for recovering hydrogen isotopes from hydrogen isotope lithium compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0041] In a glove box filled with argon, weigh the two raw material powders of lithium deuteride and magnesium diboride at a molar ratio of 1:1, pour them into a stainless steel ball mill jar with a volume of 100 ml, and grind them under an argon atmosphere. Next, use a planetary ball mill to mill for 2 h, and carry out mechanical mixing treatment to obtain the first mixture, and its XRD pattern is as follows: figure 1 (a) shown.

[0042] Put the first mixture obtained from the ball mill into the reactor, vacuumize it, put the reactor into the heating furnace, and heat the reactor to 400°C; then, quickly fill the reactor with 99.99% purity Hydrogen to 6 MPa, carry out the hydrogen absorption reaction for 15 minutes, the hydrogen absorption reaction curve is as follows figure 2 shown. From figure 2 It can be seen from the figure that the hydrogen absorption is basically completed after the reaction takes about 10 min. Afterwards, the temperature of the reactor was kept at...

Embodiment 2

[0044]In a glove box filled with argon, weigh the two raw material powders of lithium deuteride and magnesium diboride at a molar ratio of 2:1, pour them into a stainless steel ball mill jar with a volume of 100 ml, and grind them under an argon atmosphere. Next, use a planetary ball mill to mill for 1 h, and carry out mechanical mixing treatment to obtain the first mixture.

[0045] Put the first ball-milled mixture into the reactor, vacuumize it, put the reactor into the heating furnace, and heat the reactor to 350°C; then, quickly fill the reactor with 99.99% purity Hydrogen to 5MPa, carry out the hydrogen absorption reaction for 120 min, the hydrogen absorption reaction curve is as follows image 3 shown. from image 3 It can be seen from the figure that the hydrogen absorption is basically completed after the reaction takes about 90 min. XRD after hydrogen absorption as Figure 4 As shown, it can be found that after absorbing hydrogen, they are all converted into LiBQ...

Embodiment 3

[0047] In a glove box filled with argon gas, two kinds of raw material powders of lithium deuteride and magnesium diboride were weighed at a molar ratio of 2:1, and were ground with a mortar for 10 min under an argon atmosphere, and mixed to obtain the first a mixture.

[0048] Put the first ball-milled mixture into the reactor, vacuumize it, put the reactor into a heating furnace, and heat the reactor to 250°C; then, quickly fill the reactor with hydrogen with a purity of 99.99% to 7 MPa for hydrogen absorption reaction. After the hydrogen absorption is completed, the temperature of the reactor is cooled to room temperature, the hydrogen pressure is reduced to 0 bar, and then the reactor is heated at a heating rate of 5°C / min to cause the dehydrogenation reaction of the hydrogen absorption product, and the deuterium can be released from the dehydrogenation reaction. released during the process, the hydrogen desorption curve is as follows Image 6 As shown, it can be found t...

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Abstract

The invention discloses a method for recycling hydrogen isotopes from a hydrogen isotope lithium compound, aiming at solving the problems that heat decomposition need to be carried out at 700 DEG C or more when tritium is extracted and recycled from lithium tritide, heat decomposition and tritium extraction of the lithium tritide in a lithium-aluminum alloy need to be controlled to be 530 DEG C to 630 DEG C and tritium removal of a gas-solid exchange method needs to be carried out at 580 DEG C or more. The method comprises the following steps: under a protection atmosphere, mixing the hydrogen isotope lithium compound and magnesium diboride; carrying out hydrogen absorption reaction on a mixture to obtain a hydrogen absorption product; carrying out hydrogen desorption treatment on the hydrogen absorption product and recycling the hydrogen isotopes through hydrogen desorption reaction. The method has the advantages of low operation time and short time; the permeation loss of the hydrogen isotopes is reduced in a process of recycling, extracting and removing the hydrogen isotopes and the like, and the safety coefficient is improved; the method has important practical significance and progressive significance on environment protection and promotion of development and application of a hydrogen isotope fuel technology.

Description

technical field [0001] The invention relates to the field of extraction and recovery of hydrogen isotopes, especially the recovery of hydrogen isotopes, specifically a method for recovering hydrogen isotopes from hydrogen isotope lithium compounds. The present invention can be used for the recovery of hydrogen isotope in hydrogen isotope lithium compound, especially can be used for 6 Li produces tritium (lithium can be mainly divided into 6 Li and 7 Li, general use 6 Li produces tritium) and then realizes the extraction and recovery of tritium from lithium tritide and the removal of residual tritium (that is, to provide a method that can extract and recover tritium from lithium tritium under low temperature conditions), which has simple process and effective Obvious advantages of low temperature. The hydrogen isotopes are one or more of protium (H), deuterium (D) and tritium (T). Background technique [0002] With the increasing shortage of natural resources, the increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B4/00
CPCC01B4/00Y02P20/129
Inventor 寇化秦何晖唐涛张光辉刘梦佳邓潇君把静文戴丹玲
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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