Preparation method and application of boron nitride block adsorbent for treating iodine vapor pollutants

A boron nitride and pollutant technology, applied in chemical instruments and methods, gas treatment, nitrogen compounds, etc., can solve the problems of difficulty in recycling, low thermal stability, adsorption capacity in service, etc., to achieve large output and reduce energy. The effect of reducing consumption and production cost

Active Publication Date: 2020-05-15
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the disadvantages of low thermal stability and weak chemical inertness of most current iodine vapor adsorbents, it is difficult to serve in harsh environments such as acidity, strong oxidation, and flammability, and the adsorption capacity is low and it is difficult to recycle and reuse. Preparation method of foamy bulk adsorbent assembled from BN nanofibers induced by metal ions in situ

Method used

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  • Preparation method and application of boron nitride block adsorbent for treating iodine vapor pollutants
  • Preparation method and application of boron nitride block adsorbent for treating iodine vapor pollutants
  • Preparation method and application of boron nitride block adsorbent for treating iodine vapor pollutants

Examples

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Effect test

Embodiment 1

[0041] (1) 0.424gAgNO 3 Dissolve in 5mL deionized water and prepare a metal ion solution with a concentration of 0.0025mol / L for later use.

[0042] (2) boric acid and melamine are mixed in 250mL beaker and add 245mL deionized water, make precursor solution, make the boric acid that contains the melamine of 0.018g and 0.0126g in every milliliter of water; The amount of substance of boric acid and melamine The ratio is 3:1;

[0043] (3) Put the precursor solution in step (2) into a constant temperature stirrer at 90° C. and stir for 2 hours to completely dissolve the boric acid and melamine.

[0044] (4) Transfer 245 mL of the solution obtained in step (3) to room temperature for stirring, and pour 5 mL of the solution containing metal ions prepared in (1) into while stirring. Stir for 3min.

[0045] (5) Transfer the beaker in step (4) to an ultrasonic instrument that has been cooled to 10°C in advance, and perform ultrasonication at 45KHz, 350W, and 50% power for 4 hours un...

Embodiment 2

[0050] After the adsorption in Example 1 is completed, the BN block adsorbent is placed at a high temperature of 200°C for iodine vapor desorption treatment. After the desorption is completed, the adsorption experiment is repeated in cycles. After 5 repeated cycles, the obtained adsorption results are approximately Example 1.

Embodiment 3

[0052] Change the heat treatment temperature in Example 1 to 1050° C., other operations are the same as in Example 1, and the product obtained is the same as in Example 1.

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Abstract

The invention relates to a preparation method and application of a boron nitride block adsorbent for treating iodine vapor pollutants. The method comprises the following steps: adding boric acid and melamine into deionized water to prepare a precursor solution; pouring the precursor solution into a metal ion solution under stirring; then carrying out ultrasonic treatment in an ultrasonic instrument until floccules are completely separated out so as to obtain a precursor containing metal ions; sealing the precursor, transferring the precursor to a low-temperature environment, freezing for 1-24hours, taking out the precursor, immediately putting the precursor into a freeze dryer for freeze-drying, and finally carrying out a heat treatment at 900-1500 DEG C to finally obtain the product, wherein the metal ion compound is specifically AgNO3, CuCl2.2H2O or MnCl2. The obtained material not only has large adsorption capacity to iodine vapor, but also is not easy to pollute the environment due to the blocky shape of the material, and can be recycled after adsorption is completed.

Description

technical field [0001] The design scheme of the present invention relates to the field of ecological environment protection of boron nitride nanomaterials, specifically a preparation method of a foamy boron nitride block adsorbent composed of in-situ induction of metal ions and its use in the treatment of iodine vapor pollutants aspects of application. Background technique [0002] In today's era, global energy consumption continues to increase, while fossil fuels continue to decrease, and seeking other alternative energy sources has become one of the most urgent tasks for human survival. As a representative new energy, nuclear energy has the advantages of high efficiency and low cost. However, the negative impact of nuclear energy cannot be ignored. Nuclear fuel is prone to produce radioactive pollutants (such as iodine, tritium, krypton, etc.), which will cause great harm to living things and the environment. In nuclear fuel waste, most iodide ions are oxidized by nitri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30B01D53/02C01B21/064H01B1/06
CPCB01J20/0259B01J20/02B01D53/02C01B21/064H01B1/06B01D2257/202B01D2253/10
Inventor 黄阳李洪宇林靖李根张旭唐成春
Owner HEBEI UNIV OF TECH
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