Nano-space Deformation in Active Carbon by Heat Treatment

Activated carbon fibers have nano-space that contributes to their huge specific surface area (SSA) of more than 1000m2/g. The SSA shows a critical decrease at HTT-1600°C, with an almost constant value of SSA up to this HTT, although the basicstructure is conserved up to HTT=2000°C. For the mechanism of this sudden decrease in SSA, two ideas based on a molecular sieve effect in the crystallite intra-space and a percolation of crystallites are discussed.