Activated carbon fibers(ACFs) were prepared in this research from a polyacrylonitrile(PAN) precursor with the KOH(1~4 M) pretreatment and following activation at 800oC in a lab-scale. The sample ACFs were characterized according to their textural properties, and evaluated for CO2 adsorption capacity. The surface area and pore volume of ACFs increased according to the pretreatment with KOH; for example, 4M-KOH aqueous solution resulted in 1552.5 m2/g specific surface area and 0.605 cc/g pore volume. It also showed high CO2 adsorption amount(3.11 mmol/g) which showed a proportional increase with reaction pressure.

Toluene is one of the typical index substances of environmental odor. In this study the vaporized toluene was decomposed by peroxide ions which are formed from a newly developed low-temperature plasma generator. The number of ions composed mostly of negative was controlled by electric voltage below 3.0 kV, which could produce the minimum super oxide and ozone. The test plasma generator produced 84.1~560×103 ions/㎤ depending on air velocity. It was found that toluene decomposition rate corresponded proportionally to the plasma intensity. The efficiency with the plasma output, 3.0 kV was 97.5% in a batch process.