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Ammonia gas adsorbent and preparation method thereof

An adsorbent and ammonia technology, applied in the field of environmental purification, can solve the problems of difficulty in forming porous materials, expansion, pulverization and agglomeration, and small contact area of ​​ammonia, so as to increase the adsorption capacity, avoid pulverization and falling, The effect of increasing the contact area

Pending Publication Date: 2021-08-10
上海国瓷新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the adsorption materials used for ammonia adsorption and recycling at home and abroad mainly include zeolite, activated carbon, graphene oxide, alumina, silica gel and porous organic polymers, etc., but It is difficult for these materials to form stable porous materials, and the contact area with ammonia gas is small, so the adsorption capacity is often not high. The functional modification and design of these materials with alkaline earth metal chlorides can improve the adsorption capacity, but the alkaline earth metal chloride modification The permanent adsorption material has relatively serious expansion, pulverization and agglomeration in the actual use process, which is unfavorable for long-term adsorption

Method used

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preparation example Construction

[0027] The present invention provides a kind of preparation method of the ammonia sorbent described in above-mentioned scheme, comprises the steps:

[0028] The metal chloride is dissolved in a solvent to obtain a metal chloride solution;

[0029] Mix molecular sieves with metal chloride solution and dry to obtain active components;

[0030] The active component is made into a slurry and coated on the cordierite honeycomb ceramics to obtain an ammonia gas adsorbent.

[0031] The invention dissolves the metal chloride in the solvent to obtain the metal chloride solution. In the present invention, the solvent is preferably water, methanol, ethanol. In the present invention, the concentration of the metal chloride solution is preferably 5%-20%, more preferably 10%-15% by weight percentage.

[0032] After the metal chloride solution is obtained, the present invention mixes the molecular sieve with the metal chloride solution and dries to obtain the active component. In the pre...

Embodiment 1

[0037] 1. Active Component Preparation

[0038] Take 20g of ZSM-5 molecular sieve and evenly disperse in 80g of copper chloride solution with a mass concentration of 5%, stir for 2h at a speed of 100r / min, take out the molecular sieve and dry it in an oven at 80°C for 5h, and then put in chlorine Adsorption is carried out in the copper chloride solution, and the above operation is repeated until the adsorption is completed to obtain the active component.

[0039] 2. Coating

[0040] Evenly disperse the active component in deionized water, add aluminum sol binder (the mass ratio of active component: binder: water is 1:1:8), stir at a speed of 100r / min for 2h, and then immerse in the Bluestone honeycomb ceramics (the active component is 30% of the mass of cordierite honeycomb ceramics), vacuum adsorption (vacuum degree is 0.5Mpa) for 2min, take out, purging, and drying at 100°C for 3h to obtain ammonia adsorbent.

Embodiment 2

[0042] 1. Active Component Preparation

[0043] Take 20g of SAPO-34 molecular sieve and evenly disperse in 5g of calcium chloride solution with a mass concentration of 20%, stir at a speed of 100r / min for 2h, and then dry in an oven at 70°C for 6h to obtain the active component.

[0044] 2 coating

[0045] Evenly disperse the active components in deionized water, add silica sol binder (the mass ratio of active components: binder: water is 1:0.5:8.5), stir at 100r / min for 2h, and then immerse in Viola Bluestone honeycomb ceramics (the active component is 25% of the mass of cordierite honeycomb ceramics), vacuum adsorption (vacuum degree: 0.1Mpa) for 5 minutes, taken out, purged, and dried at 110° C. for 2.5 hours to obtain ammonia adsorbent.

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Abstract

The invention provides an ammonia gas adsorbent and a preparation method thereof, and belongs to the technical field of environment purification. The ammonia gas adsorbent comprises an active component and cordierite honeycomb ceramic; and the active component comprises a molecular sieve and a metal chloride. The ammonia gas adsorbent can be applied to the aspect of ammonia gas adsorption.

Description

technical field [0001] The invention belongs to the technical field of environmental purification, and in particular relates to an ammonia adsorbent and a preparation method thereof. Background technique [0002] Ammonia (NH 3 ) is an important chemical raw material, which is widely used in industry. At the same time, ammonia is also a polluting and highly corrosive air pollutant, which will have a great impact on human health and the ecological environment. On the one hand, ammonia can irritate the respiratory tract and other human tissues; on the other hand, ammonia can interact with atmospheric NO x and SO 2 Combined, and through a series of chemical transformations to form particulate matter, causing smog. According to the indoor air quality standard, the maximum indoor ammonia concentration is 0.2635ppm. Therefore, how to reduce the emission of ammonia and reduce the content of ammonia in the environment has become an urgent problem to be studied and solved. [00...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30B01D53/02F24F8/15
CPCB01J20/186B01J20/12B01J20/0237B01J20/0288B01J20/046B01D53/02B01D2257/406Y02A50/20
Inventor 刘欢李智林德宝彭冲宋锡滨
Owner 上海国瓷新材料技术有限公司
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