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http://dx.doi.org/10.9713/kcer.2018.56.6.856

Re-carbonation of Calcined Limestone Under Oxy-Circulating Fluidized Bed Combustion Conditions  

Kim, Ye Bin (Department of Mineral Resources and Energy Engineering, Chonbuk National University)
Gwak, You Ra (Department of Mineral Resources and Energy Engineering, Chonbuk National University)
Keel, Sang In (Environment Systems Research Division, Korea Institute of Machinery and Materials (KIMM))
Yun, Jin Han (Environment Systems Research Division, Korea Institute of Machinery and Materials (KIMM))
Lee, See Hoon (Department of Mineral Resources and Energy Engineering, Chonbuk National University)
Publication Information
Korean Chemical Engineering Research / v.56, no.6, 2018 , pp. 856-863 More about this Journal
Abstract
In order to investigate the re-carbonation behaviors of limestones in an oxy-circulating fluidized bed combustor (Oxy-CFBC), the re-carbonation characteristics of domestic 4 different limestone samples were analyzed in a thermogravimetric analyzer (TGA-N1000) with the higher concentration of $CO_2$. Effect of reaction temperature ($600{\sim}900^{\circ}C$) and $CaCO_3$ content (77~95%) of limestones were determined and the mass change of the CaO was observed. Under the temperature of $800^{\circ}C$, the conversion rate increased with increasing reaction temperature. However, the conversion rate decreased with increasing reaction temperature over $800^{\circ}C$. In the case of $CaCO_3$ content, the conversion was remarkably different at $870^{\circ}C$. In addition, reaction rate equations for simulating the re-carbonation of limestone by using gas solid reaction models were proposed in this study.
Keywords
Oxy-fuel combustion; Re-carbornation; Limestone; TGA; Kinetics;
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Times Cited By KSCI : 5  (Citation Analysis)
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