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Activated Carbon

Introduction

Introduction

Activated carbon for removal of acid gases

GEBEL Activated Carbon is a high capacity activated carbon for the specific removal of acid gases such as Hydrogen Sulphide (H2S), Sulphur Dioxide (SO2) and Hydrochloric Acid (HCl). Based on a robust activated carbon base material, this product is also able to remove traces of organic odour compounds including mercaptans (R-SH). GEBEL Activated Carbon is able to operate at high relative humidities without detrimental effect on product performance.  Available in a range of granular size ranges and pellet diameters, GEBEL Activated Carbon can be supplied to meet all pressure loss requirements.

                           

What is Activated Carbon?

What is Activated Carbon?

GEBEL Activated Carbon is charcoal that has been treated with oxygen to open up millions of tiny pores between the atoms.  By using of special manufacturing techniques, this then results in highly porous charcoals that have surface areas of 300 to 2,000m² per gram. These activated carbons are then widely used to adsorb odourous or coloured substances from gases or liquids. ­

The word adsorb is important to note and NOT to be confused with “absorb”. When a material adsorbs something, it attaches to it by chemical attraction. The huge surface area of activated carbon gives it countless bonding sites. When certain chemicals pass next to the carbon surface, they attach to the surface and are trapped.

GEBEL Activated Carbon is good at trapping other carbon-based impurities ("organic" chemicals), as well as being specifically used for the removal of acid gases such as Sulphur Dioxide (SO2), Hydrogen Sulphide (H2S) and Hydrochloric Acid (HCl).  It is able to operate at high relative humidities without effecting product performance.

Many other chemicals are not attracted to carbon at all such as sodium and nitrates so they pass right through. This means that a GEBEL activated carbon filter will remove certain impurities while ignoring others. Once all of the bonding sites are filled, the activated carbon is no longer effective and needs to be replaced.

How it works

How it works

Process Description:

Water is pumped into a column which contains GEBEL Activated Carbon.  This water then leaves the column through a draining system.  The activity that occurs in the GEBEL Activated Carbon column is dependent on the temperature and the nature of the substances present.  Water is constantly pumped through the column, which then results in an accumulation of substances in the filter.  The efficiency of the Activated Carbon decreases with each process.  It is for this reason that the filter needs periodic replacement.  Working with several columns in a series will assure that you will not have total exhaustion of your purification system.

Description of Adsorption:

Molecules from gas or liquid phases will be attached physically to the surface of the GEBEL Activated Carbon.  This adsorption takes place in three steps- the level of adsorption being based on the concentration of substance in the water, the temperature and the polarity of the substance.  A polar substance- (soluble in water); either cannot be or is ineffectively removed by Activated Carbon.  A non- polar substance can be entirely removed using GEBEL Activated Carbon. 

Factors That Can Influence the Performance of Activated Carbon:

  • Type of compound that is required to be removed:  In general, compounds with a high molecular weight,lower vapour pressure/ higher boiling point and have a high refractive index are more easily adsorbed.
  • Concentration: The higher the concentration levels, the higher the Activated Carbon consumption.
  • Temperature: The lower the temperature, the better the adsorption capacity will be.
  • Humidity: The lower the humidity, the better the adsorption capacity will be.

Why Use Activated Carbon?

Why Use Activated Carbon?

 

Features and Benefits

• High H2S removal capacity

• Exceptional product hardness

• Rigourosly dedusted

• Clean handling at adsorber loading and commissioning

• Minimal product degradation giving low pressure drop change

• High neutralisation capacity

• Minimal effect of high relative humidity on performance

• Granular or extruded product

Available Pellet Diameters
 
• 5 mm
• 4mm
• 3mm 
• 2mm
• Other particle sizes considered on  request
 
Available Particle Sizes
 
• 3 x 6 mesh (6.30 - 3.35 mm)
• 4 x 8 mesh (4.75 - 2.36 mm)
• 6 x 12 mesh (3.35 - 1.70 mm)
• 8 x 16 mesh (2.36 - 1.18 mm)
• Other particle sizes considered on  request
Standard Packaging
 
• 25 kg sack (55 lb)

• 500 kg bulk bag (1100 lb)

 
• Other packing considered on request  
 
Polyethylene valve sacks, stacked 20 per pallet, wrapped and stowed two-high for shipment.
 

 

 

 

 

 

    

Specifications

Specifications

 Specification*

 

 CTC adsorption (base)

Min. 60 % 

 Butane adsorption (base)

Min. 23 %   

 Total ash content (base)

Max. 12 % 

 Moisture content (product)

Max. 15% 

 Apparent density (product)

Min. 580 Kg/m

 Ball pan hardness (base)

Min. 95% 

 H2S adsorption capacity

Min. 0.15g H2S/cm3 carbon 

 Particle size tolerance (pellet)

± 10 %

 Particle size tolerance (granular)  

           Oversize max.

5 %

           Undersize max.

5 %

   
   
 TYPICAL PROPERTIES*  
 CTC adsorption (product)

40 % 

* SPECIFICATIONS AND TYPICAL PROPERTIES ARE PRODUCED USING APPROVED CARBONS' TEST METHODS. THEY ARE LISTED FOR INFORMATIONAL PURPOSES ONLY AND NOT TO BE USED AS PURCHASE SPECIFICATIONS. SALES SPECIFICATIONS CAN BE OBTAINED FROM YOUR CARBONS TECHNICAL SALES REPRESENTATIVE AND SHOULD BE REVIEWED BEFORE PLACING AN ORDER.