Articles & Issues
- 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
Zinc Titanate의 황화반응 특성 및 미반응핵 모델에 의한 반응속도
Sulfidation Reactivity of Zinc Titanate Sorbent and Reaction Kinetics by Unreacted Core Model
HWAHAK KONGHAK, August 1999, 37(4), 499-503(5), NONE
Download PDF
Abstract
1.5 ZnO : 1.0 TiO2로 구성되어진 탈황제와 H2S의 황화반응은 전체반응속도가 물질전달저항, 내부확산저항, 화학반응 저항에 의해 지배된다는 미반응핵모델을 사용하여 설명할 수 있다. 그러나 600℃이하의 낮은 온도범위에서의 반응은 전체반응속도가 화학반응저항만으로 지배되는 특별한 미반응핵모델에 의해 설명될 수 있다. 본고에서 반응속도상수를 전체 반응속도가 화학반응저항에 의해 지배되는 미반응핵 모델식에 의해 계산하였으며, 겉보기 활성화에너지를 Arrhenius식에 의해 계상하였다. 그 결과 ZT01이 겉보기 활성화에너지는 9.010cal/mol이었고, ZT02의 겉보기 활성화에너지는 10,350cal/mol이었다.
The sulfidation reaction between H2S and a desulfurization sorbent composed of 1.5 ZnO:1.0 TiO2 can be described by the unreacted core model in which the global reaction rate is controlled by mass transfer, product layer diffusion and chemical reaction resistance. But at a low temperature like below 600℃, sulfidation reaction can be described by the special case of the unreacted core model which assumes that the global reaction rate is controlled only by the chemical reaction resistance. In this work, the reaction rate constants were determined by using this special case of unreacted core model and apparent activation energy was calculated by the Arrhenius equation. Apparent activation energies were 9.010 cal/mol(ZT01) and 10,350 cal/mol(ZT02).
Keywords
References
Chen HT, Klett MG, Rutkowski MD, Zaharchuk R, Proceedings of the Coal-Fired Power Systems 93, DOE/METC-93/6131, 359 (1993)
Park YS, Rhee YW, Son JE, Chem. Ind. Technol., 11(5), 366 (1993)
Ramachandran PA, Doraiswamy LK, AIChE J., 28, 881 (1982)
Dulin FH, Rase DE, J. Am. Ceram. Soc., 43, 125 (1960)
Gangwal SK, Wood MC, Harrison DP, Groves FR, Jothimurugesan K, In Proceedings of the 8th Annual Gasfication and Gas Stream Cleanup System Contractor's Review Meeting, ed. Kothari, V.P., Longanbach, J.R., 1, 181 (1988)
Szekely J, Evans JW, Sohn HY, "Gas-Solid Reaction," Academic Press, New York (1976)
Yagi S, Kunii D, "Fifth International Symposium on Combustion Reinhold," New York (1955)
Levenspiel O, "Chemical Reaction Engineering," John Wiley & Sons, Inc., 2nd ed., 357 (1972)
Jothimurugesan K, Harrison DP, Ind. Eng. Chem. Res., 29, 1167 (1990)
Woods MC, Leese KE, Gangwal SK, Harrison DP, Jothimurugesan K, "Reaction Kinetics and Simulation Models for Novel High-Temperature Desulfurization Sorbents," Final Report to DOE/METC, DOE/MC/24160-2671 (1989)
Lee TJ, Park NK, Kim JH, Kim KS, Park YW, Yi CK, HWAHAK KONGHAK, 34(4), 435 (1996)
McCabe WL, Smith JC, Harriott P, "Unit Operations of Chemical Engineering," McGraw-Hill, Inc., 5th., 670 (1993)
Park YS, Rhee YW, Son JE, Chem. Ind. Technol., 11(5), 366 (1993)
Ramachandran PA, Doraiswamy LK, AIChE J., 28, 881 (1982)
Dulin FH, Rase DE, J. Am. Ceram. Soc., 43, 125 (1960)
Gangwal SK, Wood MC, Harrison DP, Groves FR, Jothimurugesan K, In Proceedings of the 8th Annual Gasfication and Gas Stream Cleanup System Contractor's Review Meeting, ed. Kothari, V.P., Longanbach, J.R., 1, 181 (1988)
Szekely J, Evans JW, Sohn HY, "Gas-Solid Reaction," Academic Press, New York (1976)
Yagi S, Kunii D, "Fifth International Symposium on Combustion Reinhold," New York (1955)
Levenspiel O, "Chemical Reaction Engineering," John Wiley & Sons, Inc., 2nd ed., 357 (1972)
Jothimurugesan K, Harrison DP, Ind. Eng. Chem. Res., 29, 1167 (1990)
Woods MC, Leese KE, Gangwal SK, Harrison DP, Jothimurugesan K, "Reaction Kinetics and Simulation Models for Novel High-Temperature Desulfurization Sorbents," Final Report to DOE/METC, DOE/MC/24160-2671 (1989)
Lee TJ, Park NK, Kim JH, Kim KS, Park YW, Yi CK, HWAHAK KONGHAK, 34(4), 435 (1996)
McCabe WL, Smith JC, Harriott P, "Unit Operations of Chemical Engineering," McGraw-Hill, Inc., 5th., 670 (1993)
