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Issue
Korean Chemical Engineering Research,
Vol.42, No.5, 510-517, 2004
금속(Fe 및 K) 담지 활성탄소를 위한 열처리 반응의 속도론적 고찰
Kinetics of Heat Treatment for Metal (Fe or K) Impregnated Activated Carbons
김준식, 이재광, 김상도, 이철위, 이상봉, 최명재
Fe 또는 K를 담지한 활성탄소의 열처리를 수행하고 이들 활성탄소의 특성을 XRD, BET 표면적, 기공 분포, CO2와 NH3의 승온 탈착(TRD) 분석방법으로 살펴보았다. 또한, 열중량 분석(TGA)에 의한 열처리 반응의 속도론을 고찰하였으며 활성화에너지를 결정하기 위하여 Kissinger, Freeman-Carroll, Friedman 방법을 이용하였다. 열처리에 의하여 금속 활성탄소의 중기공 부피는 증가하였으나 미세공 부피와 BET 표면적은 크게 감소하였다. 이들 활성탄소는 상용 활성탄소에 비하여 상대적으로 높은 CO2와 NH3 흡착량을 나타내었다.
Heat treatment of the activated carbons impregnated with Fe or K was carried out and these metal activated carbons (MAC) characterized by XRD, BET surface area, pore size distribution and CO2 and NH3 temperature programmed desorption (TPD). Also, The kinetics of the heat treatment was investigated by thermogravimetric analysis(TGA). Kissinger, Freeman-Carroll and Friedman method have been used to determine the activation energies. The mesopore volume of MAC was increased by heat treatment, but the micro volume and BET surface area decreased remarkably. CO2 and NH3 adsorption for the MAC is found to be higher than the commercial activated carbon (CAC).
Keywords: Activated Carbon; Heat Treatment; Impregnation; Metal
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