Physical, chemical und technical properties of activated carbon

To ensure it provides adequate protection when used in NBC protective filters, activated carbon must first satisfy several physical and chemical criteria:

Granulation (grain shape and size) has a bearing on the packing density and fill properties of the filter, and more importantly its flow resistance and release efficiency (oxygen exchange kinetics: air/activated carbon).
The activated carbon must have sufficient resistance to abrasion and should not release excessive quantities of dust
It should not have high moisture levels (moisture-related ageing)
It is also tested for ammonia desorption, when impregnated with an ammonium metal salt solution.
Given that in its usual form activated carbon ignites at high temperatures, it should not easily ignite once impregnated.

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