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Process system for preparing deuterium-depleted water and method for preparing deuterium-depleted water applied process system

A process system and technology of deuterium-depleted water, applied in chemical instruments and methods, water, electrodes, etc., can solve the problems of small hydrogen isotope separation coefficient and difficulty in separating deuterium, and achieve good corrosion resistance, improve separation coefficient, and high hydrogen evolution. active effect

Active Publication Date: 2019-10-18
深圳百奥捷生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the separation principle of deuterium-depleted water is simple, it is very difficult to separate deuterium due to the extremely low abundance of deuterium isotopes in natural water and the small separation coefficient of hydrogen isotopes.

Method used

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  • Process system for preparing deuterium-depleted water and method for preparing deuterium-depleted water applied process system
  • Process system for preparing deuterium-depleted water and method for preparing deuterium-depleted water applied process system
  • Process system for preparing deuterium-depleted water and method for preparing deuterium-depleted water applied process system

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Experimental program
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Effect test

Embodiment 1

[0021] 1. Experimental principle and setting method

[0022] The basic principle of electrolysis of water is to split water by passing direct current in the presence of electrolyte. The general form of electrolyzed water can be described by formula (1):

[0023]

[0024] When deuterium exists in water, due to the difference in mobility between protium ions and deuterium ions in solution, plus the overpotential of deuterium is greater than that of protium, protium is preferentially discharged on the electrode. Therefore, when water is electrolyzed, the deuterium in the released hydrogen is depleted, while the deuterium in the solution is enriched. The separation coefficient of protium and deuterium varies greatly due to the difference in cathode material, electrolyte properties, and electrolysis conditions.

[0025]In this embodiment, different cathode materials are used to electrolyze raw water, and the influence of the cathode electrode material on the separation coeffic...

Embodiment 2

[0045] The process system for preparing deuterium-depleted water used in this example includes a raw material water permeator, a hydrogen generator, a hydrogen collector, a gaseous deuterium separator, a hydrogen burner and a water vapor condensing unit connected in sequence through pipelines. The wall of the raw water permeator is provided with an exhaust port communicating with the outside world, and the inside is filled with ZrO 2 (5%V 2 o 3 )filler. An electrolytic cell, a DC power supply and electrodes are provided in the hydrogen generator. The electrolytic cell is provided with a cathode chamber and an anode chamber which are mutually isolated. The cathode and the anode are respectively inserted into the cathode chamber and the anode chamber. , the electrolyte solution that adopts is the KOH solution of 0.5M, with Pt electrode as anode, with the Pt / 3%P-Co in embodiment 1 72 Fe is used as a cathode, and a copper wire is used to connect the electrode and a DC power sup...

Embodiment 3

[0057] Instruments and Equipment: Isotope Ratio Mass Spectrometer 253Plus 10kV (Thermo Fisher Scientific).

[0058] Test water sample: embodiment 2, comparative example 1, comparative example 2, comparative example 3, the raw material water that comparative example 4 adopts; The deuterium-depleted water product of embodiment 2; The deuterium-depleted water of comparative example 1 Product; the deuterium-depleted water product of comparative example 2; the deuterium-depleted water product of comparative example 3; the deuterium-depleted water product of comparative example 4.

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Abstract

The invention provides a process system for preparing deuterium-depleted water. The process system for preparing the deuterium-depleted water comprises a hydrogen generator, a hydrogen burner and a steam condensing unit which are sequentially connected through a pipeline; and en electrode and an electrolytic cell are arranged in the hydrogen generator, a cathode electrode of the electrode is a platinum electrode, and the platinum electrode is doped with 2-5% phosphorus substances. According to the process system for preparing the deuterium-depleted water, the platinum electrode can keep higherelectrochemical activity in the electrolysis water process, the certain number of phosphorus substances are doped in the platinum electrode to form a Pt-P alloy, a separation coefficient of the platinum electrode for protium and deuterium is obviously improved, cathode electrolysis water provided with the substance is achieved, the electrodeposition rate of deuterium ions in a water solution is much lower than that of protium ions, a large number of deuterium ions are enriched on the cathode, a large number of low-deuterium hydrogen is deposited in the cathode, the obtained low-deuterium hydrogen is burnt, and deuterium content in source water is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of stable isotopes, and in particular relates to a process system for preparing deuterium-depleted water and a method for preparing deuterium-depleted water using the same. Background technique [0002] Water molecules are made up of hydrogen and oxygen atoms. Hydrogen has 3 isotopes - protium ( 1 H), deuterium ( 2 D) and tritium ( 3 T). H and D are non-radioactive stable isotopes, while T is a radioactive element. In nature, the content of H is the most, the content of D is very small, and the content of T is very small. If the water molecule H 2 The H in O is replaced by D and T respectively, forming heavy water D 2 O and super heavy water T 2 O. Natural water is H 2 O and D 2 A mixture of O, wherein the ratio of deuterium to hydrogen (D / H) is about 1:6600, that is, the volume fraction of deuterium in water is 0.015%. Generally, water with a deuterium concentration lower than 0.015% (150ppm) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B5/00C25B1/04C25B11/04
CPCC01B5/00C25B1/04C25B11/061C25B11/051C25B11/075Y02E60/36
Inventor 郑超秦伟
Owner 深圳百奥捷生物科技有限公司
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