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Received November 4, 2008
Accepted February 11, 2009
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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
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Prevention of bed agglomeration with iron oxide during fluidized bed incineration of refuse-derived fuels
Department of Environmental Engineering, Pukyong National University, 599-1 Daeyeon-3dong, Nam-gu, Busan 608-737, Korea
leejk@pknu.ac.kr
Korean Journal of Chemical Engineering, September 2009, 26(5), 1399-1404(6), 10.1007/s11814-009-0205-8
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Abstract
The present study was performed to evaluate the effect of iron oxide addition on the prevention of bed agglomeration during the fluidized bed incineration of refuse-derived fuels (RDFs) having different alkali contents. To investigate the extent of bed agglomeration as a function of the Fe2O3/(K2O+Na2O) molar ratio, a simulation was performed by using a thermodynamic equilibrium model. Based on this simulation, potassium (K) component exhibited a much higher affinity for iron (Fe) component than for silicon (Si) component, and the extent of agglomeration was remarkably reduced. Therefore, a small amount of iron oxide added to the bed effectively reduced the extent of bed agglomeration in the fluidized bed incineration process. Furthermore, the extent of agglomeration decreased as the molar ratio of Fe2O3/(K2O+Na2O) increased until unity was attained. In excess Fe2O3, no potassium silicate melts existed in the products, while the amount of sodium silicate melts remained constant.
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Outokumpu Research Oy Information Service, Outokumpu HSC chemistry for windows version 5.1, ISBN 952-9507-08-9, Pori, Finland (2002)
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Adam C, Peplinski B, Michaelis M, Kley G, Simon FG, Waste Manag., 29, 1122 (2009)
Kim MR, Jang JG, Yoa SJ, Kim IK, Lee JK, J. Chem. Eng. Jpn., 38(11), 883 (2005)
Kim MR, Kim KH, Jang JG, Lee JK, J. Chemical Eng. Japan, 41, 721 (2008)
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Covey GH, Algar, UK Patent Application, 6B 2019370A (1978)
