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Metal organic framework material for adsorption separation of xenon gas and krypton gas and preparation method and application thereof

A technology of metal-organic framework and krypton gas, which is applied in the direction of specific gas purification/separation, separation methods, non-metallic elements, etc., can solve the problems of loss of separation performance, easy collapse of structure, poor stability, etc., and achieve good adsorption and separation effects, adsorption The effect of stable performance and stable performance

Active Publication Date: 2018-12-14
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thallapally et al. used metal organic framework material Ni-MOF-74 to effectively realize the separation of xenon and krypton (Facile xenon capture and release at room temperature using a metal–organic framework: a comparison with activated charcoal.Chem.Commun.,2012,48,347- 349), its selectivity reaches 7.3, but the stability of the material is poor when exposed to water, and the structure is easy to collapse in the wet environment containing water vapor and lose the separation performance

Method used

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  • Metal organic framework material for adsorption separation of xenon gas and krypton gas and preparation method and application thereof
  • Metal organic framework material for adsorption separation of xenon gas and krypton gas and preparation method and application thereof
  • Metal organic framework material for adsorption separation of xenon gas and krypton gas and preparation method and application thereof

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Effect test

Embodiment 1

[0045] Mix 1.5mmol tin chloride, 1.5mmol 2,5-dihydroxy-1,4-benzoquinone, and 10mL deionized water, put them into a 25mL hydrothermal reactor, and stir and react at room temperature for 12 hours. After the reaction is completed, the solid obtained from the reaction is centrifuged and washed several times with deionized water and ethanol to obtain a purified metal-organic framework material. The purified adsorbent was vacuum degassed at 100 °C for 12 h to obtain the desolvated adsorbent, followed by gas adsorption.

[0046] In order to test the adsorption-separation performance of the above-synthesized MOFs, single-component adsorption isotherms of xenon and krypton were carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature at 0°C and 25°C. After testing, at 0°C and 1 bar, the adsorption amount of xenon gas reaches 1.10mmol / g, and the adsorption amount of krypton gas is only 0.57mmol / g; The adsorption amount of gas is only...

Embodiment 2

[0050] Mix 1.5mmol cobalt chloride hexahydrate, 1.5mmol 2,5-dihydroxy-1,4-benzoquinone, and 10mL deionized water, put them into a 25mL hydrothermal reactor, and stir and react at room temperature for 12 hours. After the reaction is completed, the solid obtained from the reaction is centrifuged and washed several times with deionized water and ethanol to obtain a purified metal-organic framework material. The purified adsorbent was vacuum degassed at 100 °C for 12 h to obtain the desolvated adsorbent, followed by gas adsorption.

[0051] In order to test the adsorption-separation performance of the above-synthesized MOFs, single-component adsorption isotherms of xenon and krypton were carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature at 0°C and 25°C. After testing, at 0°C and 1 bar, the adsorption amount of xenon reaches 2.55mmol / g, and the adsorption amount of krypton is only 1.81mmol / g; at 25°C and 1bar, the adsorpti...

Embodiment 3

[0055] Mix 1.5mmol zinc acetate dihydrate, 1.5mmol 2,5-dihydroxy-1,4-benzoquinone, and 10mL deionized water, put them into a 25mL hydrothermal reaction kettle, and stir and react at room temperature for 12 hours. After the reaction is completed, the solid obtained from the reaction is centrifuged and washed several times with deionized water and ethanol to obtain a purified metal-organic framework material. The purified adsorbent was vacuum degassed at 100 °C for 12 h to obtain the desolvated adsorbent, followed by gas adsorption.

[0056] In order to test the adsorption-separation performance of the above-synthesized MOFs, single-component adsorption isotherms of xenon and krypton were carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature at 0°C and 25°C. After testing, at 0°C and 1 bar, the adsorption amount of xenon reaches 2.96mmol / g, and the adsorption amount of krypton is only 1.97mmol / g; at 25°C and 1bar, the adsor...

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Abstract

The invention discloses a metal organic framework material for separating xenon gas and krypton gas and a preparation method and application thereof. The metal organic framework material has a generalstructure formula of [M(C6O4)].nH2O or [M2(C6O4)3].nH2O. In the formula, M represents scandium, vanadium, zirconium, molybdenum, chromium, iron, copper, yttrium, tin, niobium or titanium ion and n represents the number of water molecules and is 2-8. The metal organic framework material is a three-dimensional network structure formed from transition metal ions or alkaline earth metal ions and an organic ligand (2, 5-dihydroxy-1, 4-benzoquinone) through a coordination bond or an intermolecular force, wherein the water molecule coordinates with the metal and produces strong hydrogen bonding effects on oxygen atoms of the organic ligand. The metal organic framework material is used as an adsorbent to adsorb and separate the mixed gas containing xenon gas and krypton gas. The metal organic framework material has good stability and high adsorption separation selectivity. The preparation method has simple processes and realizes a low preparation cost.

Description

technical field [0001] The invention relates to a metal organic framework material which can be used for the separation of xenon and krypton and a separation method of xenon and krypton, belonging to the technical field of adsorption and separation materials. Background technique [0002] Clean, dense, and relatively affordable, nuclear energy may be the most economically viable alternative to fossil fuels today. However, while nuclear energy is used in large quantities, the highly radioactive waste it produces must be recovered from the waste for safe production. In these wastes, radioactive elements 85 Kr has a half-life of up to 10.8 years, 127 Although the half-life of Xe is relatively short (36.3 days), the above-mentioned radioactive elements are likely to cause air pollution and endanger human health, so they need to be recovered from waste for utilization. In addition, xenon (Xe) is a very important resource, which has been widely used in basic research fields suc...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01D53/02C01B23/00
CPCB01D53/02B01J20/226C01B23/0057C01B2210/0035C01B2210/0037
Inventor 鲍宗必李良英任其龙张治国杨亦文杨启炜
Owner ZHEJIANG UNIV
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