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Method for adsorbing and separating octafluoropropane in sulfur hexafluoride by using metal-organic framework material

An organic framework and octafluoropropane technology, which is applied in the field of adsorption and separation of octafluoropropane and metal-organic framework materials in sulfur hexafluoride, can solve the problems of insignificant adsorption effect and the like, and achieve the effect of remarkable separation effect.

Pending Publication Date: 2022-05-13
ANHUI XINLT POWER TECH CONSULTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, domestic and foreign to SF 6 Gas purification treatment mainly adopts two methods of cryogenic enrichment and adsorbent adsorption. The cryogenic enrichment is mainly based on SF 6 、C 2 f 6 、C 3 f 8 、CF 4 The different boiling points of gases are used to separate these gases. Researches by China Electric Power Research Institute, Shanxi Electric Power Research Institute, and Wuhan Nanrui Co., Ltd. have found that activated alumina and KDHF-03 molecular sieve adsorbents have a good effect on SF 6 SOF in gas 2 、SOF 4 , SF 4 , SO 2 、CF 4 and other gases have a certain adsorption effect, while for SF 6 C in gas 2 f 6 、C 3 f 8 The adsorption effect is not obvious

Method used

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  • Method for adsorbing and separating octafluoropropane in sulfur hexafluoride by using metal-organic framework material
  • Method for adsorbing and separating octafluoropropane in sulfur hexafluoride by using metal-organic framework material
  • Method for adsorbing and separating octafluoropropane in sulfur hexafluoride by using metal-organic framework material

Examples

Experimental program
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Embodiment 1

[0038] Example 1: Application of TEA-Zr-MOF metal-organic framework material to adsorb and separate octafluoropropane in sulfur hexafluoride

[0039] 1) Synthesis of TEA-Zr-MOF metal-organic framework materials by hydrothermal synthesis

[0040] First weigh 2.0974g ZrCl 4 , 1.4952g of terephthalic acid and 15.4mL of template agent (glacial acetic acid) were dissolved in 80mL of solvent DMF (the molar ratio of zirconium chloride, terephthalic acid and glacial acetic acid was 1:1:30), ultrasonic for 30 minutes Until the mixture is evenly dispersed; then pour the reaction solution into a 250mL reactor. Put the reaction kettle into a programmed temperature-controlled oven preheated to 120°C to react for 24 hours. After the reaction kettle is fully cooled, wash it with DMF solution and methanol solution for 3 times, and centrifuge the product in a centrifuge at 8000r / min for 5 minutes. , after drying at room temperature, put it into a vacuum oven at 150°C to activate for 12 hours...

Embodiment 2

[0049] Adsorption separation of octafluoropropane from sulfur hexafluoride using TEA-Cu-MOF metal-organic framework

[0050] 1) Preparation of TEA-Cu-MOF metal-organic framework materials;

[0051] Cu(NO 3 ) 2 ·3H 2 O (6 g) and trimesic acid (3 g) were respectively dissolved in a mixed solvent consisting of deionized water (51 ml), ethanol (51 ml) and DMF (51 ml), and stirred uniformly respectively. Then the obtained copper ion solution and trimesic acid solution were mixed evenly, poured into a 250mL polytetrafluoroethylene reactor, and the reactor was placed in a temperature-controlled oven at 85°C for 24 hours. After the reactor was fully cooled, it was washed with DMF and ethanol three times each, and the washed and filtered powder was dried overnight in a vacuum oven at 80°C to obtain a blue powder MOF-199 metal-organic framework material.

[0052] Add a certain amount of triethanolamine to the active MOF-199, and soak it in a solution containing 10mL of methanol. It...

Embodiment 3

[0061] Application of TEA / TEA / ZIF-67-4 Metal-Organic Framework Adsorption Separation of Octafluoropropane from Sulfur Hexafluoride

[0062] 1) Preparation of TEA / ZIF-67-4 metal organic framework material

[0063] Weigh 2.9103g (10mmol) of cobalt nitrate hexahydrate and dissolve it in 150ml of methanol solution, fully dissolve it, and mark it as liquid A, weigh 3.3062g (40mmol) of dimethylimidazole and dissolve it in 150mL of methanol solution, and mark it as B after fully dissolving liquid; then uniformly mix liquid A and liquid B, and magnetically stir at room temperature for 20 h to obtain a purple powder product, which is collected by centrifugation and washed three times with methanol solution, and then vacuum-dried and activated at 60°C to obtain ZIF-67-4 metal-organic framework material.

[0064] Add a certain amount of triethanolamine to the active ZIF-67-4, and soak it in a solution containing 10mL of methanol. It was then stirred in a 100ml beaker for 12 hours, filte...

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Abstract

The invention discloses a method for adsorbing and separating octafluoropropane in sulfur hexafluoride by using a metal-organic framework material, which comprises the following steps: adsorbing and separating mixed gas containing octafluoropropane and sulfur hexafluoride through an adsorption column filled with the metal-organic framework material, and controlling the adsorption and separation temperature to be 15-60 DEG C; the metal-organic framework material is a metal-organic framework material which is formed by metal ions and organic ligands through coordination and has a micropore and ultra-micropore structure. The metal ions are Zr < 4 + >, Cu < 2 + >, Zn < 2 + >, Co < 2 + >, Mn < 2 + > or Ni < 2 + >; the organic ligand is one or more of terephthalic acid, trimesic acid and dimethylimidazole. The dynamic adsorption capacity of C3F8 of the metal-organic framework material can reach 4.31 mmol / g, and is obviously superior to that of the existing adsorption material.

Description

technical field [0001] The invention relates to the field of gas adsorption and separation, in particular to a method for applying a metal-organic framework material to the adsorption and separation of octafluoropropane in sulfur hexafluoride. Background technique [0002] As a non-combustible gas with excellent chemical stability, sulfur hexafluoride has a relative molecular mass of 146.06. It is colorless, odorless and non-toxic. Because of its excellent arc extinguishing performance and insulation performance, it is often used as a Arc extinguishing medium, which requires sulfur hexafluoride to have a very high purity. However, after long-term use of sulfur hexafluoride gas, it will decompose under the influence of high-voltage electric field to produce a small amount such as HF, SF 2 , SF 4 , SO 2 f 2 and other low fluorides, after these low fluorides come into contact with metal equipment, C 2 f 6 、C 3 f 8 Fluorocarbons such as fluorocarbons, if things go on lik...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J20/34B01D53/02C01B17/45
CPCB01J20/226B01J20/3458B01J20/3425B01D53/02C01B17/453B01D2257/7022B01D2256/26Y02P20/151
Inventor 朱峰宋玉梅许一力房超武子豪叶招春
Owner ANHUI XINLT POWER TECH CONSULTING
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