Activated carbon fiber from PAN precursor and its application

摘要

Activated carbon fibers (ACF) are porous (Fig. 1) materials which absorb various components from liquid or gaseous media through physical or chemical adsorption. So they are used in various applications, especially purification of contaminated gases, adsorption of poisonous gases, separation of gases, deodorizers for air conditioners, water purification, etc. [1-4]. In addition to this, ACFs are also used in medicine [1 ]. Another category of activated carbon, granular activated carbon (GAC), is also used in the same application areas. Despite higher costs, ACFs are preferred due to their higher bulk, uniform pore size, 12-15 times higher sorption and higher mass transfer coefficient than GACs. Depending on the nature of the raw materials and their carbonization and activation processes, the resulting ACF products show an increased amount of small pores and total surface area. The ACFs produced from PAN precursors have unique adsorption capabilities and excellent strength [5].