Adsorbing agent based on carbon nanomaterial and preparation and application method thereof

A technology of carbon nanomaterials and adsorbents, which is applied in the field of adsorbents based on carbon nanomaterials, can solve the problems of increasing the number of adsorption and desorption equipment, consuming large steam or gas when heating up, and increasing the difficulty of engineering operations, so as to save raw material costs , The effect of reducing the cost of fluid transportation and shortening the desorption time

Active Publication Date: 2017-05-31
TSINGHUA UNIV
3 Cites 4 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the structure of the adsorbent is different. When desorbing the adsorbate, it needs to heat up and consume a large amount of steam or gas, and it takes a very long time.
At present, the contradiction between fast adsorption and slow d...
View more

Abstract

The invention discloses an adsorbing agent based on a carbon nanomaterial. The adsorbing agent is prepared from the carbon nanomaterial and an adhesive, wherein the mass fraction of the carbon nanomaterial ranges from 30 to 95 percent. The specific surface area of the adsorbing agent is 100 to 2000m<2>/g, and the pore volume proportion of micropores, mesopores to macropores is (1 to 2) to (1 to 5) to (1 to 20). The invention also discloses a method for preparing the adsorbing agent by adding a pore-forming agent. The adsorbing agent has the advantages of long service life, big treatment capacity, low preparation cost and the like, and is suitable for adsorbing non-polar organic compounds in a fluid.

Application Domain

Other chemical processesSolid sorbent liquid separation +1

Technology Topic

ChemistryMacropore +4

Examples

  • Experimental program(9)

Example Embodiment

[0030] Example 1
[0031] Graphene, pore former (ferric chloride) and adhesive (silica sol) are blended in a mass ratio of 1:1:1, and added to the solvent (acetone) (the mass ratio of solvent to solid mixture is 1 :1), mixing at 20°C for 8 hours. The resulting mixture is fed into a molding machine to obtain a strip product with a diameter of 1 mm and a length of 10 mm. The strip product was dried at 100°C for 24 hours. The pore former (ferric chloride) is dissolved and removed with water, filtered, washed with deionized water to neutrality, and dried at 100°C for 20 hours to obtain the final product (the mass fraction of carbon nanomaterial is 50%. The specific surface area of ​​the adsorbent is 2000m 2 /g, the pore volume ratio of micropores, mesopores and macropores is 2:5:20).
[0032] The adsorbent product is loaded into the equipment, and the upper and lower ends are fixed with the perforated cover plates, so that the height change rate of the adsorbent bed volume during the adsorption and desorption operation is less than 5%. The fluid to be treated (water containing 1% benzene by mass) is passed through, and the fluid flows through the adsorbent bed at 20° C. and 0.1 MPa. Detect the fluid composition after passing, when the organic content in the fluid no longer decreases (the adsorption rate of benzene> 99.97%), it is regarded as adsorption saturation. Under the condition of 100 Pa, the fluid on the adsorbent was sucked for 30 minutes. Then steam at 120°C is introduced to desorb the non-polar organic matter (benzene) on the adsorbent. When the content of non-polar organic matter (benzene) in the passing steam does not change, the desorption is considered complete. Stop steaming, then pass the treated fluid (water containing 1% benzene), repeat the steps of adsorption and desorption, and realize continuous operation.

Example Embodiment

[0033] Example 2
[0034] The carbon nanotubes, the pore former (ammonium carbonate and sodium nitrate, 50% by weight) and the binder (aluminum sol) are mixed in a mass ratio of 10:1:4, and added to the solvent (ethanol) (solvent) The mass ratio to the solid mixture is 5:1), and the mixture is mixed at 40°C for 3 hours. The formed mixture is fed into a molding machine to obtain a sheet product with a diameter of 10 mm and a thickness of 5 mm. The sheet product was dried at 100°C for 12 hours, the pore former (ammonium carbonate and sodium nitrate) was dissolved and removed with water, filtered, washed with deionized water to neutrality, and dried at 80°C for 4 hours to obtain The final product (the mass fraction of carbon nanomaterials is 70%. The specific surface area of ​​the adsorbent is 100m2/g, and the pore volume ratio of micropores, mesopores and macropores is 1:5:20).
[0035] The adsorbent product is loaded into the equipment, and the upper and lower ends are fixed with the perforated cover plates, so that the height change rate of the adsorbent bed volume during the adsorption and desorption operation is less than 10%. The fluid to be treated (ethanol with a mass fraction of 4 ppm xylene) is passed through, and the fluid flows through the adsorbent bed at 120° C. and 2 MPa. After detecting the fluid composition, when the content of non-polar organic matter (xylene) in the fluid no longer decreases (the xylene adsorption rate reaches 79%), it is regarded as saturated. Then, nitrogen gas at 170°C was introduced to desorb the non-polar organic matter (xylene) on the adsorbent. When the content of non-polar organics (xylene) in the passing nitrogen gas does not change, it is deemed that the desorption is complete. Stop the nitrogen flow, and then flow into the treated fluid (ethanol with a mass fraction of 4 ppm xylene), repeat the steps of adsorption and desorption to achieve continuous operation.

Example Embodiment

[0036] Example 3
[0037] The carbon nanotubes and graphene (50% each by mass), pore former (calcium carbonate) and binder (PVDF) were mixed at a mass ratio of 10:4:1 at 240°C for 6 hours. The formed mixture is fed into a molding machine to obtain a tubular product with a length of 8 mm, an inner diameter of 2 mm, and an outer diameter of 5 mm. The tubular product was dried at 70°C for 24 hours. The pore-forming agent (calcium carbonate) was removed with hydrochloric acid, filtered, washed with deionized water to neutrality, and dried at 120°C for 1 hour to obtain the final product (the mass fraction of carbon nanomaterials was 90%. Adsorbent The specific surface area is 1200m 2 /g, the pore volume ratio of micropores, mesopores and macropores is 2:1:10).
[0038] The adsorbent product is loaded into the equipment, and the upper and lower ends are fixed with the perforated cover plates, so that the height change rate of the adsorbent bed volume during the adsorption and desorption operation is less than 10%. The fluid to be treated (methanol containing 500 ppm diesel) is passed through, and the fluid flows through the adsorbent bed at 50° C. and 2 MPa. After detecting the fluid composition, when the non-polar organic matter (diesel) content in the fluid no longer decreases (the adsorption rate of diesel> When 99.6%), it is regarded as adsorption saturation. Under the condition of 1 Pa, the fluid on the adsorbent was sucked for 30 minutes. Then steam at 140°C is introduced to desorb the non-polar organic matter on the adsorbent. When the content of non-polar organic matter (diesel) in the passing steam does not change, the desorption is considered complete. Stop passing steam, and then pass the treated fluid (methanol with a mass fraction of 500 ppm diesel), repeat the steps of adsorption and desorption to realize continuous operation.

PUM

PropertyMeasurementUnit
Specific surface area100.0 ~ 2000.0m²/g
Feature size1.0 ~ 10.0mm
Diameter10.0mm

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Rapid quantitative detection method for polycyclic aromatic hydrocarbons in surface water

InactiveCN109358149Ashorten desorption timeLarge adsorption capacity
Owner:浙江环境监测工程有限公司

Adsorption and in-situ desorption and regeneration equipment and method for volatile organic compounds

PendingCN109985482Areduce usageshorten desorption time
Owner:上海一飒环保工程科技有限公司

CO2 high-selectivity adsorbent as well as preparation method and adsorption test method thereof

PendingCN114471453ARich in channels
Owner:四川亚联氢能科技股份有限公司

Molecular sieve adsorption energy-saving system

PendingCN113769535Asave steam
Owner:恒力石化(大连)炼化有限公司

Novel low-density tobacco packet remoistening device

ActiveCN102188038Areduce brokensave steam
Owner:QINHUANGDAO TOBACCO MACHINERY

Classification and recommendation of technical efficacy words

  • shorten desorption time
  • Rich in channels

Adsorption and in-situ desorption and regeneration equipment and method for volatile organic compounds

PendingCN109985482Areduce usageshorten desorption time
Owner:上海一飒环保工程科技有限公司

Rapid quantitative detection method for polycyclic aromatic hydrocarbons in surface water

InactiveCN109358149Ashorten desorption timeLarge adsorption capacity
Owner:浙江环境监测工程有限公司

CO2 high-selectivity adsorbent as well as preparation method and adsorption test method thereof

PendingCN114471453ARich in channels
Owner:四川亚联氢能科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products