Enrichment separation method of hydrogen isotopes through displacement chromatography

A technology of replacement chromatography and hydrogen isotope, applied in the field of hydrogen isotope separation, can solve the problems of difficulty in separation and enrichment of deuterium and tritium, achieve better separation effect and overcome the effect of temperature difference

Active Publication Date: 2017-05-24
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 method of the present invention can efficiently and quickly separate hydrogen isotopes—deuterium and tritium from natural pure hydrogen, has the characteristics of simple, convenient and high-efficiency implementation, and can effectively improve the problem of difficult separation and enrichment of deuterium and tritium. Provide sufficient reaction fuel

Method used

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  • Enrichment separation method of hydrogen isotopes through displacement chromatography

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare the molecular sieve column:

[0046] When preparing the molecular sieve column, select a stainless steel tube with an inner diameter of 12mm as the main structure of the molecular sieve column. After mixing evenly with adhesive and 5A molecular sieve, fill it into the above-mentioned stainless steel tube. After the filling is full, use a tube bending machine to bend the stainless steel tube into a spiral coil structure. The diameter of the spiral coil is the size that can be put into the liquid nitrogen tank. , the molecular sieve column required for the experiment was obtained.

[0047] Compared with the general molecular sieve column filling method, the spiral coil structure of the present invention significantly saves the volume of the molecular sieve column, and can more conveniently use liquid nitrogen to cool it down.

[0048] Displacement chromatography tritium enrichment separation:

[0049] Immerse the molecular sieve column completely in liquid n...

Embodiment 2

[0052] X molecular sieve material, the effect of different lifting speeds on the separation of hydrogen isotopes

[0053] Prepare X-type molecular sieve, add adhesive, extrude into strips, and fill in the molecular sieve column. The molecular sieve column is completely immersed in liquid nitrogen, and the liquid nitrogen completely submerges the molecular sieve column, so that the temperature of the molecular sieve column is reduced to the temperature of liquid nitrogen. Inject natural hydrogen gas (deuterium containing natural abundance) into the constant volume container, after the pressure of the constant volume container reaches an atmospheric pressure and stabilizes, close the injection valve, then open the valve between the constant volume container and the molecular sieve column to allow the natural hydrogen to flow into the molecular sieve column, and after the air pressure stabilizes, close the valve so that the hydrogen can be fully adsorbed on the adsorption colum...

Embodiment 3

[0060] Analyze the influence of the inner diameter of stainless steel pipes of different sizes on the separation efficiency

[0061] Prepare a type A molecular sieve, and fill it in a 316 stainless steel pipe with an inner diameter of 12 mm to make a molecular sieve column. Immerse the molecular sieve column completely in liquid nitrogen to reduce the temperature of the molecular sieve column to the temperature of liquid nitrogen. Replace and evacuate the gas in the molecular sieve with hydrogen, then treat the gas in the molecular sieve column, and then vacuumize it to keep the vacuum in the molecular sieve column. Inject natural hydrogen gas (deuterium containing natural abundance) into the constant volume container, after the pressure of the constant volume container reaches an atmospheric pressure and stabilizes, close the injection valve, then open the valve between the constant volume container and the molecular sieve column to allow the natural hydrogen to flow into ...

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Abstract

The invention discloses an enrichment separation method of hydrogen isotopes through displacement chromatography. The enrichment separation method comprises the following steps: (1) reducing the temperature: making a molecular sieve column into a spiral coil, loading a container with liquid nitrogen, wholly immersing the molecular sieve column into the liquid nitrogen, and enabling the temperature of a molecular sieve to be maintained to be the temperature of the liquid nitrogen; (2) performing adsorption: enabling hydrogen to be introduced into the molecular sieve column, measuring the quantity of the hydrogen introduced into the molecular sieve, and after the gas pressure in the molecular sieve reaches to a definite pressure, stopping introducing the hydrogen; (3) performing warming for separation: upwards lifting the spiral molecular sieve column, so that the molecular sieve column is separated from the liquid surface of the liquid nitrogen, heating the molecular sieve column with air, and controlling the speed of the molecular sieve column being lifted out of the liquid surface of the liquid nitrogen to be 0.5-5 cm/min; and (4) performing detection and collection: oxidizing hydrogen into liquid water through an oxyhydrogen compositor at a rear end for the hydrogen discharged from the molecular sieve column, and then detecting the deuterium abundance in the liquid water through a magnetic mass spectrometer. According to the enrichment separation method of tritium through displacement chromatography disclosed by the invention, changes in the controlled process of reducing the temperature and raising the temperature have continuity, the hydrogen isotope separation efficiency is extremely high, and the separation effects are good.

Description

technical field [0001] The invention belongs to the field of separation and purification technology, and relates to an isotope separation method, in particular to a hydrogen isotope separation method. Background technique [0002] The nuclear fusion reactor of the superconducting tokamak is considered to be the nuclear fusion reactor with the most practical application potential. It can realize the green nuclear energy technology with extremely low radiation pollution. Countries all over the world have invested a lot of manpower and material resources in applied research. Deuterium and tritium, hydrogen isotopes used as fuel for nuclear fusion reactors, are in great demand in research applications, and once the thermonuclear fusion reactor is put into production, the existing production of deuterium and tritium will become a limit to the application of thermonuclear reactors The key factor. [0003] Hydrogen isotopes deuterium and tritium are generally uniformly dispersed i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/28G01N30/72
CPCB01D59/28G01N30/72
Inventor 杨莞罗德礼宋江锋邓立胡俊冯兴文黄国强殷雪峰丁海成徐远翔
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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