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Received March 18, 2004
Accepted July 22, 2004
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금속(Fe 및 K) 담지 활성탄소를 위한 열처리 반응의 속도론적 고찰
Kinetics of Heat Treatment for Metal (Fe or K) Impregnated Activated Carbons
한국화학연구원 화학기술부, 305-600 대전시 유성구 장동 100 1한국에너지기술연구원 에너지환경연구부, 305-343 대전시 유성구 장동 71-2
Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon 305-600, Korea 1Energy and Environmental Research Division, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea
junskim@krict.re.kr
Korean Chemical Engineering Research, October 2004, 42(5), 510-517(8), NONE Epub 18 November 2004
Abstract
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
References
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Okada K, Yamamoto N, Kameshima Y, Yasumori A, J. of Colloid and Interface Sci., 262, 194 (2003)
Teng H, Wang SC, Ind. Eng. Chem. Res., 39, 673 (2000)
Ariyadejwanich P, Tanthapanichakoon W, Nakagawa K, Mukai SR, Tamon H, Carbon, 41, 157 (2003)
Huidobro A, Pastor AC, Rodriguez-Reinoso F, Carbon, 39, 389 (2001)
Tsai WT, Chang CY, Lin MC, Chien SF, Sun HF, Hsieh MF, Chemosphere, 45, 51 (2001)
Oh WC, J. Korean Ind. Eng. Chem., 13(5), 434 (2002)
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