Impact-resistant and high-adsorption-capacity molecular sieve composite structure and preparation method thereof

A composite structure and molecular sieve technology, which is applied in separation methods, chemical instruments and methods, layered products, etc., can solve problems such as product cracking, easy breakage, complex heat transfer and mass transfer, etc., and achieve improved impact resistance. Forming precision, flexible methods and various effects

Pending Publication Date: 2020-07-17
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the molecular sieve adsorbent itself has poor mechanical strength, it is generally made into a sphere and packaged for use, and it is also prone to breakage and powder loss during use.
On the other hand, there are pores after the molecular sieve spheres are stacked, so the adsorption capacity per unit volume is limited to a certain extent.
[0003] The heat and mass transfer in the preparation and drying process of monolithic molecular sieve adsorbent is very complicated, and its internal stress can easily cause product cracking, making it difficult to obtain a large-scale structure with a good shape
Easy to bump and damage during assembly and transportation

Method used

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  • Impact-resistant and high-adsorption-capacity molecular sieve composite structure and preparation method thereof
  • Impact-resistant and high-adsorption-capacity molecular sieve composite structure and preparation method thereof
  • Impact-resistant and high-adsorption-capacity molecular sieve composite structure and preparation method thereof

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Experimental program
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preparation example Construction

[0041] A method for preparing an impact-resistant, high-adsorption molecular sieve composite structure, comprising the following steps:

[0042] S1, select upper surface plate, lower surface plate, molecular sieve adsorbent and honeycomb material;

[0043] S2. Activate the molecular sieve adsorbent;

[0044] S3, filling the activated molecular sieve adsorbent in the honeycomb pores of the honeycomb structure to obtain a honeycomb filled molecular sieve adsorbent;

[0045] S4. Laminate the upper surface plate, the honeycomb-filled molecular sieve adsorbent, and the lower surface plate in sequence, and then place them in a forming mold to obtain a molecular sieve composite structure after curing.

[0046] In some embodiments, the temperature for activating the molecular sieve adsorbent is 300° C. to 500° C., and the time is 1 hour to 10 hours.

[0047] In some embodiments, the curing is carried out in a vacuum heating environment at 60° C. to 200° C., and the curing time is 0....

Embodiment 1

[0049] According to the size requirements of the specific product, prepare the upper surface plate, the lower surface plate, molecular sieve adsorbent, and honeycomb material of appropriate size; the upper surface plate and the lower surface plate are made of porous nylon membrane, and the molecular sieve adsorbent is made of 4A molecular sieve powder (100 mesh) , The honeycomb material is aluminum honeycomb panel (wall thickness 0.1mm, hexagonal honeycomb, honeycomb hole side length 15mm, height 10mm). The 4A molecular sieve powder was activated at 350°C for 3 hours. Then, the activated 4A molecular sieve powder is filled in the honeycomb pores of the honeycomb material, and compacted by a molding machine to obtain a honeycomb-filled molecular sieve adsorbent. Place the upper surface plate, the honeycomb-filled molecular sieve adsorbent, and the lower surface plate stack in the molding mold in sequence, vacuumize and heat the molding in the molding machine, and the curing con...

Embodiment 2

[0051] According to the size requirements of specific products, prepare upper surface board, lower surface board, molecular sieve adsorbent, and honeycomb material of appropriate size; wherein the upper surface board and lower surface board adopt non-woven fiber paper, and the molecular sieve adsorbent adopts 3A molecular sieve particles (6 Hexagonal cylinder, side length 10mm, height 10mm), honeycomb material adopts aramid honeycomb panel (wall thickness 0.1mm, hexagonal honeycomb, honeycomb hole side length 10mm, height 10mm). The 3A molecular sieve particles were activated at 350°C for 6 hours. Then the activated 3A molecular sieve particles are filled in the honeycomb pores to obtain the honeycomb filled molecular sieve adsorbent. Place the upper surface plate, the honeycomb-filled molecular sieve adsorbent, and the lower surface plate laminate in the forming mold in sequence, heat and form in a vacuum bag, and the curing condition is 90°C for 2 hours. After curing, the mo...

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Abstract

The invention discloses an impact-resistant and high-adsorption-capacity molecular sieve composite structure and a preparation method thereof. The molecular sieve composite structure comprises a honeycomb filled molecular sieve adsorbent, an upper surface plate and a lower surface plate, the honeycomb filled molecular sieve adsorbent is positioned between the upper surface plate and the lower surface plate, the invention also relates to a method for preparing the impact-resistant and high-adsorption-capacity molecular sieve composite structure, and the method comprises the following steps: activating a molecular sieve adsorbent, filling the honeycomb skeleton with molecular sieve adsorbent particles or powder, placing the honeycomb-filled molecular sieve adsorbent between the upper surfaceplate and the lower surface plate to obtain a prefabricated part, and sending the prefabricated part into a mold for curing. The molecular sieve composite structure prepared by the method disclosed by the invention can have a relatively large size, the impact resistance is greatly improved, and meanwhile, the molecular sieve composite structure is prevented from being broken and falling off in transportation and use processes, on the other hand, compared with particle packaging, the saturated adsorption capacity of the composite structure in unit volume is further improved. The method provided by the invention can be used for manufacturing large-size complex-shaped composite structural parts.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction engineering, and in particular relates to a molecular sieve composite structure with impact resistance and high adsorption capacity and a preparation method thereof. Background technique [0002] Molecular sieve to H 2 O, NH 3 、H 2 S, CO 2 The polarity of such gas molecules has a high affinity, especially for water, which is still very high under very harsh conditions such as low partial pressure (even below 133 Pa) or low concentration, and high temperature (even above 100°C). adsorption capacity. Because the molecular sieve adsorbent itself has poor mechanical strength, it is generally made into a sphere and packaged for use, and it is also prone to breakage and powder loss during use. On the other hand, there are pores after the molecular sieve spheres are stacked, so the adsorption amount per unit volume is limited to a certain extent. [0003] The heat and mass transfer in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/30B01D53/02B32B15/088B32B15/09B32B15/20B32B27/02B32B27/10B32B27/12B32B27/32B32B27/34B32B27/36B32B29/00B32B3/08B32B3/12B32B3/24B32B5/02B32B37/06B32B37/10
CPCB01J20/28011B01J20/28045B01J20/3007B01D53/02B32B15/088B32B15/09B32B15/20B32B27/10B32B27/12B32B27/32B32B27/36B32B29/005B32B3/085B32B3/12B32B3/26B32B5/022B32B5/02B32B5/26B32B37/06B32B37/10B32B2250/40B32B2250/26B32B2262/0269B32B2307/558
Inventor 何韧邢涛吕剑吴菊英范敬辉尹昊白新阳王国力
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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