MESOPORE DEVELOPMENT IN PAN-ACF RESULTING FROM NONMETAL ADDITIVES

The narrow pore-size distribution of activated carbon fibres (ACF) lim its their application in the fields concerning larger molecules, such as liquid adsorption and catalyst support. On the addition of carbon p articles and organic materials to polyacrylonitrile fibres, and after stabilizing and activating, the mesoporosity in the resultant ACF has been obviously increased. Among these additives, carbon black gives th e best effect. With 1 wt % carbon black I in precursor and on activati ng at 880 degrees C for 30 min, a mesoporosity of 48.2% (total pore vo lume 0.704 ml g(-1), mesopore volume 0.340 ml g(-1)) has been obtained . The mechanism of mesopore formation is also discussed.