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Preparation method of hydrophobic catalyst for hydrogen-water isotope exchange

An isotope exchange and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of high utilization rate of active metal, diversified shapes and specifications, and high strength

Inactive Publication Date: 2014-02-05
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a hydrophobic catalyst for hydrogen-water isotope exchange in view of the problems of existing hydrophobic catalysts for hydrogen-water isotope exchange such as single shape and low utilization rate of active metals

Method used

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  • Preparation method of hydrophobic catalyst for hydrogen-water isotope exchange
  • Preparation method of hydrophobic catalyst for hydrogen-water isotope exchange
  • Preparation method of hydrophobic catalyst for hydrogen-water isotope exchange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of 2mm×2mm θ rings with a loading capacity of 0.8~1% hydrophobic catalyst on regular shaped metal fiber mats

[0050] The specific steps of preparation are as follows.

[0051] 1. The supporting carrier is a square metal fiber felt of 100mm×100mm, such as figure 1 shown. Weigh metal fiber felt (specific surface area 235m 2 g -1 , porosity 88%, thickness 2mm) initial weight.

[0052] 2. Weigh 200mg of Pt / C catalyst, 500mg of polytetrafluoroethylene and 200mg of polymethyl methacrylate respectively, add these three components into a grinding bowl for grinding, then add about 100ml of deionized water, and disperse with ultrasonic stirring A homogeneously mixed aqueous solution.

[0053] 3. Take out 1.2ml of the emulsifier with a liquid extractor, put it into a beaker, and add a small amount of deionized water to disperse it, then slowly add it to the aqueous solution prepared in step 2, and use ultrasonic stirring throughout the process. Continue ultrason...

Embodiment 2

[0059] Preparation of Corrugated Hydrophobic Catalyst Using Corrugated Metal Fiber Mat as Support

[0060]1. The support carrier is a square metal fiber mat of 100mm×100mm, and the metal fiber felt is processed into a corrugated shape. Weigh metal fiber felt (specific surface area 235m 2 g -1 , porosity 88%, thickness 2mm) initial weight.

[0061] 2. Weigh 200mg of Pt / C catalyst, 500mg of polytetrafluoroethylene and 200mg of polymethyl methacrylate respectively, add these three components into a grinding bowl for grinding, then add about 100ml of deionized water, and ultrasonically stir and disperse A homogeneously mixed aqueous solution.

[0062] 3. Take out 1.2ml of the emulsifier with a liquid extractor, put it into a beaker, and add a small amount of deionized water to disperse it, then slowly add it to the aqueous solution prepared in step 2, and use ultrasonic stirring throughout the process. Continue ultrasonic stirring until the solution becomes a suspension to mak...

Embodiment 3

[0066] Weigh 200mg of Pt / C catalyst, 550mg of polytetrafluoroethylene and 220mg of polymethyl methacrylate respectively, put these three components into a grinding bowl for grinding, then add about 120ml of deionized water, ultrasonically stir and disperse until uniform mixing of aqueous solution. Take out 1.3ml of the emulsifier with a liquid extractor, put it into a beaker, and add a small amount of deionized water to disperse it, then slowly add it to the aqueous solution, and use ultrasonic stirring throughout the process. Continue ultrasonic stirring until the solution becomes a suspension to make a suspension. Others are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a hydrophobic catalyst for hydrogen-water isotope exchange, which belongs to the technical field of catalyst exchange and aims at solving the problems of single shape, low utilization rate of reactive metals, and the like in an existing hydrophobic catalyst for hydrogen-water isotope exchange. The preparation method comprises the steps of suspension liquid preparation, loading, and heat treatment. The hydrophobic catalyst prepared by the method can meet the requirements of water tritium removal and heavy water purification and production on special filling configuration (in bulk, in order and the like) and performance in produced exchange columns with different scale grades. According to the method, a metal fiber felt serves as a support carrier and a foaming agent is used for modifying the micro structure of a hydrophobic membrane, the prepared hydrophobic catalyst has the characteristics of controllable shape, varied shape specifications, honeycomb-structure of the hydrophobic membrane, high utilization rate of reactive metals, high strength, and the like, and can meet the requirements of tritium removal and heavy water purification and production on filling configuration and performance in exchange columns with different scale grades.

Description

technical field [0001] The invention belongs to the technical field of catalyst exchange, in particular to a method for preparing a hydrophobic catalyst for hydrogen-water isotope exchange. Background technique [0002] During the operation of fission reactors, fusion reactors, spent fuel reprocessing plants and various tritium treatment systems, tritium-containing waste water with different concentrations will inevitably be produced, and tritium in oxidized state (including HTO, DTO and T 2 O) is more radiotoxic than elemental gases tritium (including HT, DT and T 2 ) is 10000 times stronger. From safety and environmental considerations, the tritium concentration in water must be limited to <1Ci / L. Taking the CANDU reactor (that is, the Candu reactor) as an example, it uses heavy water as a moderator, and its annual tritium production rate is 1.4~2kCi / MWe, and its equilibrium tritium concentration C ∞ The value of depends on the neutron flux in the core area and D 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04B01J31/28
Inventor 叶林森罗德礼唐涛杨莞姚勇
Owner SICHUAN INST OF MATERIALS & TECH
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