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Activated Alumina Balls

Activated Alumina Balls

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Alumina Balls for Air Drying Solution

Activated alumina grade SORB-I (AD - 101) having surface area in the range 345-415 m2/g. because it has highest water absorption capacity then other adsorbents. Sorbead India supply alumina balls for thermal swing adsorption process, oil filtration, air & gas drying process. We supply alumina balls for HOC, heated and heatless air drying process, as well as alumina for fluoride and arsenic removal. Get effective moisture/water absorption results from the air for a long time with regeneration process.

Regeneration of Activated Alumina AD101:

Once the adsorbent bed is saturated, it is no longer effective and must be regenerated. This is normally done by passing a gas stream over the adsorbent at (160-185°C). The actual temperature is set by the design of the unit.

Because of heat losses, the bed outlet temperature should always be lower than the temperature of the inlet during heating. If the outlet temperature starts increase above the inlet, stop the heating step immediately. This condition indicates that a heat-releasing reaction may be occurring. Close the inlet and outlet valves to the vessel being heated, depressurize it to the flare, and purge it with nitrogen. Contact us for assistance.

During regeneration, the adsorbent bed may be as hot as 260°C. Always check the cooling outlet temperature after regeneration to ensure the bed is cool before exposing it to the feed stream. The adsorbent has high heat capacity and low thermal conductivity. It can stay hot for weeks if a shutdown occurs before the bed has been completely cooled.

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Features of Alumina Balls:

  • Primarily used for air drying with low temperature application
  • Especially suited for compressed air drying systems
  • Extremely effective for drying gases
  • A high efficient adsorbent with high porosity and large contact surface area.
  • Very stable physical & chemically, even in high temperature and corrosive environment.
Shape Spheres / Balls
Sizes in mm 1-3, 2-5, 3-5, 5-8, 8-10
Bulk density  (gm / lit) 0.700 - 0.800
BET Surface area (m2 / gm) 345 - 415
Pore Volume (cc / gm) 0.40 - 0.50
Adsorption Capacity (60 % RH)  21.5
Attrition Loss (%) 0.2
Chemical Composition (%)
Na2O  NMT 0.5
Fe2O3  NMT 0.05
SiO2 NMT 0.10
Crushing Strength (kgf / cm2) 8-12
LOI (300°C-1000°C) 6-8
Al2O3 (By difference) Min 94
  • Drying of organic liquids such as LPG, propylene, butane, steam cracked liquids, gasoline and fluorinated hydrocarbons, aromatic solvents
  • Drying of industrial gases, including steam cracked gases, catalytic reforming recycle gas, synthesis gas, methyl chloride, LNG, etc.
  • Drying of natural gases such as hydrogen, oxygen, nitrogen, carbon dioxide
  • Purification of gases and liquids (removal of metallic traces, BF3, TBC, HCl, HF)
  • Catalyst for clause conversion in sub dew point processes
  • Industrial air drying (including instrumental air, supersonic wind tunnel, compressed air, heated and heatless air)
  • Fluoride and arsenic remove from water
  • Tower packaging

Alumina Balls for Water Treatment

ALSORB-F, a true grade of activated alumina has long been considered the best technology for fluoride remove from aqueous solutions. It is an aluminium oxide that is highly porous and exhibits high surface area. ALSORB-F has a high preference for water de-fluoridation process compared to other adsorbent. The minimum adsorption capacity of ALSORB-F for fluoride to be 2.85 mg F/g of alumina.

Regeneration of Activated Alumina ALSORB-F:

The fluoride removal system normally requires regeneration to make them cost effective. Regeneration is accomplished by a simple process whereby a dilute caustic solution is used to strip the adsorbent fluoride and other dissolved contaminants off of the surface of the media. The caustic step is followed by rinsing and then the ALSORB-F is reconditioned with hydrochloric acid or surface acid. As some of the alumina can be dissolved during regeneration it is recommended to plan for periodic media "top-up".

Step-1: Regeneration with 1% NaOH, Caustic Solution
Step-2: Rinse with H2O
Step 3: Neutralize with 2% HCL to bringing effluent back to desired working Ph level.

Features of Alumina Balls:

  • Uniform ball size
  • High crushing strength
  • High adsorption capacity
  • Low bulk density
  • Low attrition loss
  • Dust free operation
  • Long service life

Technical Parameter:

Type Activated Alumina
Physical Form Spherical Beads
Particle Size 1-3mm, 2-5mm, 4-8mm
Uniformity Coefficient <1.6
Total Capacity for Fluoride Pickup Min 2.85 mg/g media @ Equal, pH5.5
Apparent Bulk Density 720-800 kg/m3
Porosity >65%
Pore Volume 0.42-0.49 cm3/gm
Crushing Strength – Newton >120N
Loss on Ignition (LOI) 6-10% @300°c
Bet Surface Area 200-70 m2/gram

Chemical Properties:

Al2O3 ALSORB-F Alumina Balls
Na2O Activated Alumina
Fe2O3 Spherical Beads

Easy to use for water filtration process: the feed solution is simply pumped though the bed, to yield an effluent containing less than 0.1 ppm fluoride.

ALSORB-F is able to adsorb as much as 2.85gm fluoride per 1000gm alumina.

Easy to Regenerate: once saturated, the alumina bed can be regenerated by following simple steps:

  • Neutralization with 1 % NaOH
  • Rinse with H2O
  • Reactivation with 00.05 N H2SO4

Economical: Because of high adsorption capacity, a unit will be operative for a longer time before change out. This means saving on handling costs too.