Owing to its high adsorption capacity, activated carbon has been used widely in industrial application such as purification of gas and water, catalyst, catalyst support and separation process. In this paper, activated carbon was prepared from rice hull by chemical activation with NaOH and KOH. The characteristics of activated carbon through BET specific surface area, N_2 adsorption isotherm, pore size distribution, average pore radius, pore volume and SEM photograph were examined. The results showed that the most important factor in the preparation of activated carbon by chemical activation was the ratio of chemical agents added. The N_2-BET specific surface area, total pore volume and average pore radius by chemical activation with NaOH and KOH were 610~1342 m^2/g, 0.34~l.12 cm^3/g and 32~71 Å, respectively. Thus the preparation of activated carbon from rice-hull by the chemical activation was successfully carried out.

활성탄은 높은 흡착용량으로 인해 가스정제, 수질정제, 촉매나 촉매의 담체, 분리공정 등에 공업적으로 널리 응용되고 있다. 본 논문에서는 왕겨를 원료로 하여 NaOH KOH로 화학적 활성화하여 활성탄을 제조하였다. 활성탄은 BET 비표면적, N_2 등온흡착, 세공크기분포, 평균세공반경, 세공용적, SEM 관찰을 통해 그 특성을 조사하였다. 특히 화학적 활성화에 의한 활성탄 제조에 있어서 중요한 인자는 침적비율임을 알 수 있었다. NaOH, KOH을 이용한 화학적 활성화법에 의해 제조된 활성탄의 비표면적은 610~1342 m^2/g, 총세공용적은 0.34~l.12 cm^2/g, 세공반경은 32~71 Å으로 각각 나타났다. 왕겨를 원료로 화학적 활성화법에 의한 활성탄의 제조는 성공적으로 수행되었다.