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A volatile organic waste gas adsorbent having humidity stability and consisting of an MOFs/CNTs composite material

A volatile organic and composite material technology, used in gas treatment, air quality improvement, membrane technology, etc., can solve the problems of powdery and low mechanical strength of MOFs, and achieve the effect of high humidity stability and large adsorption capacity

Inactive Publication Date: 2018-12-14
GUANGZHOU EP ENVIROMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to defects such as low mechanical strength and powdery solid state of MOFs, its application in some fields is limited.

Method used

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  • A volatile organic waste gas adsorbent having humidity stability and consisting of an MOFs/CNTs composite material
  • A volatile organic waste gas adsorbent having humidity stability and consisting of an MOFs/CNTs composite material
  • A volatile organic waste gas adsorbent having humidity stability and consisting of an MOFs/CNTs composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of volatile organic waste gas adsorbent using MOF-74 / CNTs composite material:

[0039] Weigh Co(NO 3 ) 2 ·6H 2O (750mg) and 2,5-dihydroxyterephthalic acid DOBDC (250mg) were dissolved in 100mL DMF-ethanol-water mixed solvent with a volume ratio of 1:1:1 in a 250mL reaction bottle, and a certain amount of poly Walled carbon nanotubes were subjected to ultrasonic treatment for 20 minutes and then placed in an oven at 100°C for 24 hours of reaction. Take it out from the oven and cool it to near room temperature, pour out the reaction mother liquor, and obtain a brown-red crystal material. After the crystals were washed 3 times with DMF (3×20 mL), the solvent was replaced with methanol for 3d (3×3×20 mL). The Co-MOF-74 material after methanol replacement was desolvated in vacuum at room temperature for 6 h, and then slowly heated to 250 °C for 12 h under vacuum. A composite material of MOF-74 / CNTs is obtained, wherein the mass fraction of carbon nanotubes i...

Embodiment 2

[0041] The difference between this example and Example 1 is that the mass fraction of carbon nanotubes in the MOF-74 / CNTs composite material is 1%, and the amount of other raw materials used and the operation steps are the same as in Example 1.

Embodiment 3

[0043] The difference between this example and Example 1 is that the mass fraction of carbon nanotubes in the MOF-74 / CNTs composite material is 3%, and the amount of other raw materials used and the operation steps are the same as in Example 1.

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Abstract

A volatile organic waste gas adsorbent having humidity stability and consisting of an MOFs / CNTs composite material is disclosed. The mass percentage of CNTs in the adsorbent is 0.5-10%. The adsorbentadopts the MOFs / CNTs composite material, VOC adsorption performance of the adsorbent is less affected by humidity, and the adsorbent has advantages of high VOC adsorption capability and high humiditystability.

Description

technical field [0001] The invention relates to the field of gas adsorption, more specifically, to a moisture-stable volatile organic waste gas adsorbent composed of MOFs / CNTs composite materials. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) generally refer to organic compounds with high saturated vapor pressure (greater than or equal to 0.01kPa at 20°C), low boiling point, small molecular weight, and volatile at room temperature. Due to large emissions and high toxicity, it is one of the main pollutants of ambient air pollution. VOCs have been listed as priority pollutants by countries all over the world. At present, the control and purification methods of VOCs mainly include absorption method, adsorption method, photocatalysis, incineration, condensation and biodegradation. Adsorption is currently the most widely used method for removing volatile organic gases. Among the various control methods for VOCs in my country, the app...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01D53/02B01J20/30
CPCB01D53/02B01D2257/708B01J20/20B01J20/226Y02A50/20
Inventor 许嘉辉阳重阳曹姝文李锐敬王文静许佳敏冯金河赖建平肖洁
Owner GUANGZHOU EP ENVIROMENTAL ENG
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