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A kind of aluminum foil-based aluminum-fumaric acid mof adsorbent coating and its mixed solvent in-situ synthesis method and application

A technology of in-situ synthesis and mixed solvent, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problem of low water adsorption, achieve good mass transfer performance, not easy to drop powder and fall off, load high volume effect

Active Publication Date: 2022-07-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, de Lange et al. deposited CAU-10 on the surface of aluminum foil by in-situ reaction, but the overall water adsorption capacity (0.0099g / g) was relatively low, indicating that the synthesized coating was relatively thin (M.F.de Lange, T.Zeng, T.J.H.Vlugt , J.Gascon, and F.Kapteijn,Manufacture of dense CAU-10-H coatings for application in adsorption driven heat pumps: optimization and characterization.Crystengcomm 17(2015)5911-5920.)
Therefore, MOF adsorbents have rarely been reported to form thick coatings (>100 μm) on substrates by in situ synthesis.

Method used

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  • A kind of aluminum foil-based aluminum-fumaric acid mof adsorbent coating and its mixed solvent in-situ synthesis method and application
  • A kind of aluminum foil-based aluminum-fumaric acid mof adsorbent coating and its mixed solvent in-situ synthesis method and application
  • A kind of aluminum foil-based aluminum-fumaric acid mof adsorbent coating and its mixed solvent in-situ synthesis method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A mixed solvent in-situ synthesis method for an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating, comprising the following steps:

[0047] (1) In a 100mL beaker, add 0.4872g (4.2mmol) of fumaric acid to 10ml of nitrogen, nitrogen-dimethylformamide (DMF), and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL beaker 1.33g (2mmol) aluminum salt (select Al 2 (SO 4 ) 3 ·18H 2 0) add 20ml deionized water, mix homogeneously, obtain aluminum salt solution; Then mix described fumaric acid solution and aluminum salt solution homogeneously, obtain mixed solution, the volume of described nitrogen, nitrogen-dimethylformamide and water The ratio is 1:2; in the mixed solution, the fumaric acid and Al 3+ The molar ratio of acetic acid is 1.05:1, and the pH of the mixed solution is adjusted to be 1.0 by adding glacial acetic acid dropwise to obtain a uniform acidic reaction solution;

[0048] (2) Scrape off the oxide film on the sur...

Embodiment 2

[0051] A mixed solvent in-situ synthesis method for an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating, comprising the following steps:

[0052] (1) In a 100mL beaker, add 0.2552g (2.2mmol) fumaric acid to 15ml nitrogen, nitrogen-dimethylformamide (DMF), and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL beaker 0.666g (1mmol) aluminum salt (select Al 2 (SO 4 ) 3 ·18H 2 O) add 15ml deionized water, mix homogeneously, obtain aluminum salt solution; Then mix described fumaric acid solution and aluminum salt solution homogeneously, obtain mixed solution, the volume of described nitrogen, nitrogen-dimethylformamide and water The ratio is 1:1; in the mixed solution, the fumaric acid and Al 3+ The molar ratio of acetic acid is 1.1:1, and the pH of the mixed solution is adjusted to 1.5 by adding glacial acetic acid dropwise to obtain a uniform acidic reaction solution;

[0053] (2) Scrape off the oxide film on the surface of t...

Embodiment 3

[0056] A mixed solvent in-situ synthesis method for an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating, comprising the following steps:

[0057] (1) In a 100mL beaker, add 0.1392g (1.2mmol) fumaric acid to 12.5ml nitrogen, nitrogen-dimethylformamide (DMF), and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL 0.333g (0.5mmol) aluminum salt (select Al 2 (SO 4 ) 3 ·18H 2 O) add 17.5ml deionized water, mix homogeneously, obtain aluminum salt solution; Then mix described fumaric acid solution and aluminum salt solution homogeneously, obtain mixed solution, described nitrogen, nitrogen-dimethylformamide and water The volume ratio is 0.714:1; in the mixed solution, the fumaric acid and Al3+ The molar ratio of the mixture is 1.2:1, and glacial acetic acid is added dropwise to adjust the pH of the mixed solution to be 2.0 to obtain a uniform acidic reaction solution;

[0058] (2) Scrape off the oxide film on the surface of the alu...

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Abstract

The invention discloses an in-situ synthesis method and application of an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and a mixed solvent thereof. The method comprises: adding fumaric acid to nitrogen, nitrogen-dimethylformamide, adding aluminum salt to water, mixing the two evenly to obtain a mixed solution, adjusting the pH to be acidic to obtain a uniform acidic reaction solution; immersing the aluminum foil In the uniform acidic reaction solution, heat treatment, take out, wash, dry and activate to obtain the aluminum foil-based aluminum-fumaric acid MOF adsorbent coating. The aluminum foil-based aluminum-fumaric acid MOF adsorbent coating prepared by the invention has adjustable thickness, uniform and dense distribution on the aluminum foil, and high bonding strength with the substrate; the adsorbent coating has strong adsorption capacity, fast adsorption speed, and desorption. Low temperature, good cycle stability and so on. It can be used in adsorbent-coated substrates for air handling systems such as heating, ventilation and air conditioning (HVAC), and in adsorbent-coated aluminum foil fin heat exchangers for adsorption heat pump systems.

Description

technical field [0001] The invention belongs to the field of porous adsorbent composite materials, and in particular relates to an in-situ synthesis method and application of an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and a mixed solvent thereof. Background technique [0002] Solid porous adsorbents, including traditional activated carbon, activated clay, silica gel, activated alumina, and aluminosilicate molecular sieves, are widely used in the fields of adsorption and catalysis. In particular, a new class of adsorbents developed in recent years, metal-organic frameworks (MOFs), have been widely used in gas separation and storage, heat transfer and dehumidification due to their large surface area, adjustable pore size and various topological structures. more and more attention of researchers. MOFs are a class of crystalline materials composed of metal ions and organic linkers. Due to their excellent adsorption capacity, low regeneration temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/32
CPCB01J20/226B01J20/28033B01J20/3297
Inventor 梁向晖谭冰琼方玉堂汪双凤高学农张正国
Owner SOUTH CHINA UNIV OF TECH
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