What are the applications of activated alumina?

Activated alumina, due to its advantages such as large specific surface area, adjustable pore structure, good adsorption performance, acidity and thermal stability on the surface, is widely used as an adsorbent, water purifier, catalyst, and catalyst carrier in fields such as medicine, chemical industry, metallurgy, water purification, chemical analysis, waste gas treatment, etc., especially in petroleum hydrocracking, hydrofining, hydroforming, etc Dehydrogenation reaction and automobile exhaust purification play important roles in reaction processes.

1. Application of activated alumina in the field of adsorption

As an adsorbent, it is one of the main uses of activated alumina, mainly due to its large specific surface area, reasonable pore structure, good physical properties, good chemical stability, and many other favorable factors. Its important industrial applications include drying gases, drying liquids, purifying treated water, and selective adsorption in the petroleum industry.

(1) Application in gas drying

Due to the strong affinity between activated alumina and water, it has a strong ability to dry water in gases. It can dry over 20 gases such as acetylene, hydrogen, oxygen, air, nitrogen, etc.

(2) Application in liquid drying

Liquid drying is much more complex than gas drying, and the requirements for desiccants are relatively high. Firstly, when the liquid comes into contact with the adsorbent, chemical reactions cannot occur between the liquid components or between the liquid and the oxygen adsorbent. Secondly, the adsorbed substances of the dry liquid can be washed away during regeneration. At present, it has been proven that liquids that can be dried by alumina include aromatic hydrocarbons, high molecular weight olefins, gasoline, kerosene, etc.

(3) Application in water quality purification

The development of activated alumina in the field of water quality purification is very rapid, and the treatment of water quality mainly focuses on the removal of fluoride, the elimination of color and odor, and the removal of phosphate.

2. Application of activated alumina in the field of catalysts

In many industrial catalytic processes, alumina is not only used as a catalyst itself, but also as a carrier for the active components of the catalyst. Moreover, with the improvement of the forming method of active alumina catalyst carriers, various methods have been applied to the catalyst carrier industry.

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