Preparation of Polyacrylonitrile Based Activated Carbon Fiber (PAN-ACE) Having High Mesopore Volumet

Abstract

For developing of polyacrylonitrile based activated carbon fiber (PAN-ACF) having high mesopore volumes, the effects of ash in oxidized fiber, acid treatment and atmosphere in activation were investigated on the mesopore volumes (mesopore: pore radius 20-400A) and adsorption capaciies of vitamine B12. The activation of oxidized fiber containing titanium (W) oxide (0.1 %) was found to increase the mesopore volume and adsorption capa city for vitamine B12. When PAN-ACF containing titanium(1V) oxide was further treated with 1.5%aqueous solution of hydrochloric acid, nitric acid, sulfuric acid and mixed acid (hydrochloric acid/nitric acid 3/1), the fiber with specific surface area (SA) more than 1000 m2/g was greatly affected by hydrochoric acid and, nitric acid and mixed acid. With reactivation of PAN-ACF (SA: 950 m2/g) by carbon dioxide at 900 °C, . PAN-ACF having high mrsopore volumes were obtained at high specific surface areas.