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수산화칼륨을 이용한 왕겨로부터 활성탄의 제조
Preparation of Activated Carbon from Rice Hulls Using Potassium Hydroxide
HWAHAK KONGHAK, December 1998, 36(6), 913-918(6), NONE
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Abstract
국내에 부존량이 풍부한 왕겨를 원료로 수산화칼륨(KOH) 활성화제를 사용하여 활성탄을 제조해 보았다. 실험변수로서 탄화조건, 활성화온도, 수산화칼륨/탄화왕겨 질량비 등이 제조된 활성탄의 세공구조 및 수율에 미치는 영향을 조사하였다. 700℃의 질소 분위기에서 왕겨를 탄화시켜 얻어진 탄화왕겨를 KOH/탄화왕겨 질량비 4 : 1로 수산화칼륨 수용액에 침적시킨 다음 850℃의 질소 분위기에서 3시간 동안 활성화시켰을 때, 비교적 높은 비표면적과 세공용적 및 잘 발달된 세공구조를 갖는 고품질 활성탄을 제조할 수 있었다.
Activated carbon was prepared from rice hulls using potassium hydroxide as an activation agent. The effect of process variables such as carbonization, activation temperature, and chemical ratio of KOH to char on the pore structure and activation yield of the carbons was studied. High-quality activated carbons with high surface area, high pore volume, and well-developed pore structure could be prepared, when the char produced by the carbonization of rice hulls in a stream of nitrogen at 700℃ was well mixed with a concentrated solution of potassium hydroxide at a KOH : char ratio of 4 : 1 and then the mixture was activated fur 3 hours at 850℃ in a stream of nitrogen.
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Park YT, "Activated Carbon," Dongwha Kisul, 73 (1996)
Ramsey DE, Grindstaff LI, U.S. Patent, 4,248,844 (1981)
Lee JS, Am. Ceram. Soc. Bull., 54(2), 195 (1975)
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Luh BS, "Rice," Vol. II, 2nd ed., AVI Book, New York, 269 (1991)
Ko YS, Master Thesis, Inha University, Korea (1993)
Ko YS, Ahn WS, HWAHAK KONGHAK, 31(6), 707 (1993)
Kim KS, J. KSEE, 18(11), 1313 (1996)
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Kim JY, Lee JG, Hong I, Lee SS, HWAHAK KONGHAK, 34(5), 668 (1996)
Wennerberg AN, O'Grady TM, U.S. Patent, 4,082,694 (1978)
Qiao W, Zha Q, Ling L, Liu L, Proc. 22nd Biennial Conference on Carbon, San Diego, 400 (1995)
Baker FS, U.S. Patent, 5,416,056 (1995)
Lowell S, Shields JE, "Powder Surface Area and Poroxity," 3rd ed., Chapman & Hall (1991)
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Marsh H, Mochida I, Fuel, 60, 231 (1981)
