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
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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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