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Activated Alumina

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Activated Alumina has the advantages of large surface area, many mciro-pores, well disperser, so it has a high affinity for water/impurity and actived catalyst. According to the applications of balls, there are 3 types of Activated Alumina Sorbent, Activated Alumina Desiccant and Activated Alumina Catalyst carrier. Meantime interior composition of the crystal phase was divided into mode Y and X-P. 

In compressed air and gas drying applications, activated alumina will achieve dew points -40°F to -100°F, depending on the dryer design.
In compressed air desiccant dryers, a 1/8" (2-5 mm) activated alumina bead is most commonly used. The ¼" (5-10 mm) activated alumina bead is typically used as a pre-bed for supporting large desiccant beds or as a buffer for silica gel beds. The 3/16" (5-10 mm) bead is used when pressure drop and surface area requirements fall between the 1/8" and ¼" material.

Activated alumina has much micro-paths, so the specific surface is large. It can be used as absorbent desiccant and catalyst carrier. It is also a kind of trace water desiccant and the pole-molecular absorbent, according to the absorbed molecular polarization, the attachment force is strong for water, oxide, acetic acid, alkali etc.
 
Activated alumina is high strength, low abrasion, no soften in water, no expansion, no powdery, no crack. It can widely used in the deep drying of cracked gas, ethylene and propylene, hydrogen-generation, air separation, instrument air drying and fluorine treatment for H2O2, also in the absorbing pollution material, such as H2S, SO2, HF and paraffin in the water gas, especially in the drinking water defluorination.
 
Molecular Formula: Al2O3 • nH2O

Activated alumina Application:
The activated balls are widely utilized in the drying agent of multiform gas and liquid, also function is used as sorbent, desiccant, catalyst support in reactors for petrochemical industry, chemical industry, fertilizer industry and so on.  

Activated alumina eatures and Benefits
 
1.High adsorption capacity for reducing initial cost, energy consumption, and operating costs
2.Low abrasion for ensuring minimal dusting and a low pressure drop
3.Resistant to liquid water slugging resulting from the failure of up stream after-coolers, separators, or drain traps. The adsorption capacity of the desiccant can be restored after complete regeneration.
4.High crush strength for limiting dusting during loading of desiccant into dryer towers
5.Uniform bead size minimizes pressure drop, channeling, and ensures utilization of the full desiccant bed
6.In regenerative drying systems, Van Air activated alumina beds are sized for a service life of 2-5 years
 
Activated alumina Physical Properties 
 
  KA401 KA402 KA403 KA404 KA405
Appearance White, Sphere, No Odor, Insoluble In Water, Innocuous
Crystal Type x-p x-p y y x-p
Chemical Composition Al2O3 % ≥93 ≥93 ≥93 ≥93 ≥90
Na2O % ≤0.3 ≤0.3 ≤0.5 0.15-0.3 ≤0.3
LOI % 6-8 6-8 ≤8 ≤5 6-8
Bulk Density g/ml 0.68-0.72 0.70-0.75 0.65-0.75 0.70-0.80 0.68-0.72
Surface Area m2/g ≥300 ≥300 250-280 ≥280 ≥350
Pore Volume ml/g 0.30-0.45 0.30-0.42 0.40-0.46 0.40 0.30-0.50
Static Absorption (RH=60%) % Water Absorption
17-19
Fluorine Absorption 
0.12
Water Absorption
50
Water Absorption
50-70
Water Absorption
17-19
Active %     56-62    
Attrition Loss % ≤1.0 ≤1.0 ≤1.0 ≤0.4 ≤0.8
Crushing Strength (N/Particle) ¢0.4-1.2   ≥30      
¢1-2 ≥40 ≥40      
¢2-3 ≥60 ≥60      
¢3-5 ≥130   ≥100 ≥100 ≥100
¢4-6 ≥140   ≥130 ≥120 ≥110
¢5-7 ≥160        
¢6-8 ≥180        
 
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