Why is activated carbon
so good ?
Activated carbon is made by baking organic materials (wood, coconut shell, peat, coal and others) until all matter is converted to carbon. It is then “activated”, usually by driving water vapour through the material at high temperature and pressure to excavate the former cell cavities, revealing a delicate and highly porous carbon skeleton featuring millions of microscopic pores.
The functional origin of these pores means they fall into an organised hierarchy with broad (mesoscopic) transport channels feeding smaller (microscopic) chambers which themselves feed into millions of miniscule (nanoscopic) ones.
This system, which evolved in the organic matter to supply nutrient to the plant cells, becomes a highly effective way of transporting gas molecules to the adsoptive micropore and nanopore chambers that take their place after activation.