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Study of CO2 Carbonation-Regeneration Characteristics of Potassium-Based Dry Sorbents According to Water Vapor Contents of Inlet Gas and Regeneration Temperature in the Cycle Experiments of Bubbling Fluidized-Bed Reactor  

Park, Keun-Woo (Department of Environmental Engineering, Deajeon University)
Park, Yeong Seong (Department of Environmental Engineering, Deajeon University)
Park, Young Cheol (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Jo, Sung-Ho (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Yi, Chang-Keun (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Publication Information
Korean Chemical Engineering Research / v.47, no.3, 2009 , pp. 349-354 More about this Journal
Abstract
In this study, a bubbling fluidized-bed reactor was used to study $CO_2$ capture from flue gas using a potassium-based dry sorbent. A dry sorbent, manufactured by the Korea Electric Power Research Institute, consists of 35% of $K_2CO_3$ for $CO_2$ absorption and 65% of supporters for mechanical strength. $H_2O$, a reactant of the carbonation reaction, was supplied in the reactor as a form of saturated water vapor at a given temperature. The experiment of the regeneration reaction was performed by raising up to a given temperature using $N_2$ as a fluidization gas. It was indicated that sorption capacity and regenerability of dry sorbents showed high-efficiency at $1.97\;mol\;H_2O/mol\;CO_2$ and $400^{\circ}C$, respectively. The regenerated sorbent samples were analyzed by TGA to confirm the extent of the reaction. When the regeneration temperature was $150^{\circ}C$, the regenerability of dry sorbents was about 60%, which was capable of applying those sorbents to a two-interconnected fluidized-bed reactor system with continuous solid circulation. The results obtained in this study can be used as basic data for designing and operating a large scale $CO_2$ capture process with two fluidized-bed reactors.
Keywords
Carbon Dioxide Capture; Dry Sorbent; Fluidized-Bed Reactor; Water Vapor Content; Regeneration Temperature;
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Times Cited By KSCI : 2  (Citation Analysis)
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