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A kind of honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent and its in-situ synthesis method

A technology of honeycomb ceramics and in-situ synthesis, which is applied in separation methods, chemical instruments and methods, and other chemical processes. It can solve the problems of high regeneration temperature of molecular sieves, unfavorable system energy saving, and low equilibrium adsorption capacity of molecular sieves. , not easy to drop powder, high load effect

Active Publication Date: 2022-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicate molecular sieves, such as NaA, 13X, etc., show strong moisture absorption capacity, but the dehumidification core made of them is still insufficient: (1) The equilibrium adsorption capacity of molecular sieves is low (usually below 0.25g / g); (2) ) Molecular sieve regeneration temperature is high (above 200°C), which is not conducive to energy saving of the system; (3) In the preparation process, honeycomb body made of ceramic or glass fiber paper is usually used as the base material, and industrial molecular sieve with large particle size 2-5μm in diameter) as the adsorbent, under the premise of adding non-absorbing inorganic glue or organic / inorganic composite glue as the binder, it is bonded by dipping and coating

Method used

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  • A kind of honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent and its in-situ synthesis method
  • A kind of honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent and its in-situ synthesis method
  • A kind of honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent and its in-situ synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of honeycomb ceramic body: 23g / m 2 Quantitative ceramic fiber paper (mass ratio of flat paper and surface paper is 1:1) is hot-rolled (180°C) on the corrugated roller and flat roller of the corrugating machine to form single-sided corrugated paper respectively. The composition of the compound is 45wt% SiO 2 sol and 55wt% VAE glue; then covered under the action of the above glue to form a honeycomb ceramic matrix core; finally cut and polish its surface, and sintered at 500 ° C for 16 hours to remove organic matter and form a honeycomb ceramic matrix body (its size It is φ=4cm(D)×6cm(H)).

[0054] (2) Under room temperature and magnetic stirring, take a 500mL beaker, according to the molar ratio of fumaric acid / alkali / water is 1.0 / 3.25 / 83, take 23.2g fumaric acid, 26.0g sodium hydroxide, 300ml deionized water and add In the beaker, after stirring evenly, add 2.0g of PVA powder, continue to stir to obtain a clear and transparent solution A, the quality o...

Embodiment 2

[0056] (1) Preparation of honeycomb ceramic body: 23g / m 2 Quantitative ceramic fiber paper (mass ratio of flat paper and surface paper is 1:1) is hot-rolled (180°C) on the corrugated roll and flat roll of the corrugating machine respectively, and laminated into single-sided corrugated paper. The composition of the sizing material is 45wt% aluminum sol and 55wt% acrylate glue; then, the honeycomb ceramic matrix core is formed by wrapping under the action of the above sizing material; finally, the surface is cut and polished, and sintered at 700°C for 10h to remove organic matter , forming a honeycomb ceramic base body (its size is φ=4cm(D)×6cm(H)).

[0057] (2) Under room temperature and magnetic stirring, take a 500mL beaker, according to the molar ratio of fumaric acid / alkali / water is 1.0 / 3.25 / 83, take 23.2g fumaric acid, 36.4g potassium hydroxide, 300ml deionized water and add In the beaker, after stirring evenly, add 2.0g of PVP powder, continue to stir to obtain a clear a...

Embodiment 3

[0059] (1) Preparation of honeycomb ceramic body: 23g / m 2 Quantitative ceramic fiber paper (mass ratio of flat paper and surface paper is 1:1) is hot-rolled (180°C) on the corrugated roll and flat roll of the corrugating machine respectively, and laminated into single-sided corrugated paper. The composition of the above compound is 45wt% SiO 2sol and 55wt% VAE glue; then wrapping under the action of the above glue to form a honeycomb ceramic matrix core; finally cut and polish its surface, and sinter 24h at 350°C to remove organic matter and form a honeycomb ceramic matrix body (its size It is φ=4cm(D)×6cm(H)).

[0060] (2) Under room temperature and magnetic stirring, take a 500mL beaker, according to the molar ratio of fumaric acid / alkali / water is 1.0 / 3.8 / 100, take 23.2g fumaric acid, 42.6g potassium hydroxide, 360ml deionized water and add In the beaker, after the raw materials are dissolved and stirred evenly, add 2.4g CMC powder (sodium carboxymethyl cellulose) and cont...

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Abstract

The invention discloses a honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent and an in-situ synthesis method thereof. The method comprises: uniformly mixing fumaric acid, alkaline substances and water, adding a thickener, and mixing uniformly to obtain a mixed solution, immersing a honeycomb ceramic base body in the mixed solution, and drying to obtain a deprotonated rich Embryo body of malic acid; immerse the embryo body containing deprotonated fumaric acid in an aluminum salt solution, heat in a water bath, cool to room temperature, filter to collect precipitate, wash, dry, and heat for sintering and activation treatment to obtain the honeycomb Ceramic-based aluminum-fumaric acid MOF adsorbent. The honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent provided by the invention has an even and dense distribution of adsorption active substances on the honeycomb ceramic fiber embryo body, and has a high loading capacity; the adsorbent has low crystallization temperature and fast rate; the product is S Type water vapor adsorption isothermal, fast adsorption rate, high equilibrium adsorption capacity and easy desorption, etc., can be applied to the preparation of adsorption dehumidification wheel or total heat recovery device.

Description

technical field [0001] The invention belongs to the field of gas adsorption drying purification and heat recovery, and specifically relates to an in-situ synthesis method of a honeycomb ceramic-based aluminum-fumaric acid MOF adsorbent. Background technique [0002] The honeycomb ceramic-based dehumidification adsorbent constructed by the organic combination of ceramic fibers and adsorbents can be applied to adsorption dehumidification wheels and total heat recovery systems. Among them, the dehumidification core (block adsorbent) is the core of the system, and its performance determines the energy efficiency of the system. The evaluation of the performance of the desiccant core mainly includes two aspects: (1) The performance of the adsorbent itself: the adsorbent has a higher equilibrium adsorption capacity and a lower desorption temperature. (2) Composite process of adsorbent and substrate: The adsorbent is closely combined with the honeycomb substrate to prevent the adso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/26B01J20/28
CPCB01J20/226B01J20/06B01J20/08B01J20/02B01D53/261B01J20/28045B01D2257/80
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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