Articles & Issues
- Language
- korean
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
이산화탄소에 의한 CaO 탄산화 반응에서 기-고 반응 속도 모델
A Gas-Solid Reaction Kinetic Model for the Carbonation of Calcium Oxide by CO2
광주대학교 토목환경공학부, 503-703 광주시 남구 진월동 592-1 1한국에너지기술연구원 화석연료연구팀, 305-343 대전시 유성구 장동 71-2
Division of Civil & Environmental Engineering, Gwangju University, 592-1, Jinwol-dong, Nam-gu, Kwangju 503-703, Korea 1Fossil Fuel Research Lab., Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejon 305-343, Korea
dklee@hosim.gwangju.ac.kr
HWAHAK KONGHAK, December 2003, 41(6), 689-693(5), NONE
Download PDF
Abstract
무촉매 기-고 반응의 하나인 이산화탄소에 의한 CaO탄산화 반응에 있어서 반응 모델식을 다음과 같이 제시하였다: X-kbt/(b+t), 여기서, X=CaO의 탄산화 전환율, k=반응속도 상수(time-1), b=CaO의 최종 전환율의 절반에 해당하는 전환율까지 탄산화가 진행되는 데 요구되는 시간 상수(time)이다. CaO의 탄산화 속도는 다음과 같이 유도되었다: dX/dt=k[b/(b+t)]2. Cao탄산화 반응에 있어서 탄산화 전환율에 따라 나타나는 반응 초기의 표면반응 속도제한 영역과 후기의 확산 속도제한 영역에서의 상수값 k 및 b를 각각 온도의 함수로 결정하였다. CaO의 최종 탄산화 전환율은 온도에 따라 달라지며, 제시된 모델에서는 두 상수 k와 b를 곱한 값에 해당하였다. 이와 같은 모델식을 사용하여 CaO 탄산화 거동을 잘 나타낼 수 있었다.
For the kinetics of the carbonation reaction of calcium oxide by carbon dioxide, a model equation has been proposed as follows: X=kbt/(b+t), where, X=the mass fractional conversion of CaO, k=a kinetic rate constant (time-1), b=a constant (time) corresponding to the time necessary for half the ultimate conversion of CaO, and t=time. The rate of carbonation reaction is expressed as dX/dt=k[b/(b+t)]2. The constants k and b in the two regimes of CaO-conversion, surface chemical reaction control, and diffusion control, have been obtained as functions of temperature, respectively. Values of the ultimate conversion of CaO are dependent on temperature, and, in this model, given by the product of two constants, k and b. The CaO carbonation behavior has been well represented by this kinetic equation proposed.
References
Gupta H, Fan LS, Ind. Eng. Chem. Res., 41(16), 4035 (2002)
Kim JK, Yoo KS, Park TJ, Song BH, Lee JG, Kim JH, Han C, HWAHAK KONGHAK, 40(5), 582 (2002)
Kyaw K, Kanamori M, Matsuda H, Hasatani M, J. Chem. Eng. Jpn., 29(1), 112 (1996)
Kato Y, Saku D, Harada N, Yoshizawa Y, J. Chem. Eng. Jpn., 30(6), 1013 (1997)
Lin SY, Suzuki Y, Hatano H, Harada M, Energy Conv. Manag., 43(9-12), 1283 (2002)
Bhatia SK, Perlmutter DD, AIChE J., 29(1), 79 (1983)
Kunii D, Levenspiel O, Fluidization Engineering, John Wiley & Sons, N.Y. (1969)
Shih SM, Ho CS, Song YS, Lin JP, Ind. Eng. Chem. Res., 38, 1316 (1992)
Dedman AJ, Owen AJ, Trans. Faraday Soc., 58, 2027 (1962)
Kim JK, Yoo KS, Park TJ, Song BH, Lee JG, Kim JH, Han C, HWAHAK KONGHAK, 40(5), 582 (2002)
Kyaw K, Kanamori M, Matsuda H, Hasatani M, J. Chem. Eng. Jpn., 29(1), 112 (1996)
Kato Y, Saku D, Harada N, Yoshizawa Y, J. Chem. Eng. Jpn., 30(6), 1013 (1997)
Lin SY, Suzuki Y, Hatano H, Harada M, Energy Conv. Manag., 43(9-12), 1283 (2002)
Bhatia SK, Perlmutter DD, AIChE J., 29(1), 79 (1983)
Kunii D, Levenspiel O, Fluidization Engineering, John Wiley & Sons, N.Y. (1969)
Shih SM, Ho CS, Song YS, Lin JP, Ind. Eng. Chem. Res., 38, 1316 (1992)
Dedman AJ, Owen AJ, Trans. Faraday Soc., 58, 2027 (1962)
