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Carbochem - Model 101 - Activated ...

Carbochem - Model 101 -Activated Carbon

FromCarbochem Inc.

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Discover the history and properties of activated carbon filters. Learn about their origins and the factors that influence their effectiveness from Carbochem.

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activated carbon

granular activated carbon

activated carbon production

activated carbon filter

water treatment

particle sizing

physical integrity

Iodine Number

most fundamental parameter used to characterize activated carbon performance
measure of activity level (higher number indicates higher degree of activation)
measure of micropore (0 – 20 Å) content
equivalent to surface area of activated carbon in sq m/g between 900 – 1100
standard measure for liquid phase application

Methylene Blue

measure of mesopore structure (20 – 500 Å)

Caramel dp (Molasses No.)

measure of macropore structure (>500 Å)
important for decolorizing performance

Surface Area

measure of adsorption capacity (Note: pore size distribution/pore volume is also important to determine ultimate performance)

Apparent Density

higher density provides greater volume activity and normally indicates better quality activated carbon

Particle Size

smaller size provides quicker rate of adsorption which reduces the amount of contact time required
smaller size results in greater pressure drop

Hardness/Abrasion Number

measure of activated carbon’s resistance to attrition
important indicator of activated carbon to maintain its physical integrity and withstand frictional forces imposed by backwashing etc.

Dechlorination half-value length

test to measure the dechlorination efficiency of activated carbon
depth of activated carbon to reduce influent chlorine level from 5 ppm to 2.5 ppm
lower half-value length indicates superior performance

Ash Content

reduces overall activity of activated carbon
reduces efficiency of reactivation
metals (Fe2O3) can leach out of activated carbon resulting in discoloration
acid/water soluble ash content is more significant than total ash content