Abstract
An outline of the general position on active carbons from coal is presented. More studies of all aspects are needed, however, to clarify the various relations between precursor, activation process, characterization and use. The common methods of manufacture may be considered as fashioning an absorbent from naturally-occurring carbonaceous feedstocks. This process, of necessity, leads to a variety of active carbons with differences in pore structure and surface properties. An approach to a preferred structure and surface for a particular application is possible by choice of process and precursor and possibly a post-activation treatment. To achieve more-closely specified properties with coal-based carbons, a synthetic approach, based on the agglomeration of fine, activated carbon, may be worthy of further development.
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