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Solid Circulation Characteristics in a 3 kW Chemical-looping Combustor  

Ryu, Ho-Jung (Zero Emission Technology Research Center, Korea Institute of Energy Research)
Park, Jaehyeon (Zero Emission Technology Research Center, Korea Institute of Energy Research)
Kim, Hong-Ki (Department of Industrial Engineering Chemistry, Chungbuk National University)
Park, Moon-Hee (Department of Informational Statistics, Hoseo University)
Publication Information
Korean Chemical Engineering Research / v.46, no.6, 2008 , pp. 1057-1062 More about this Journal
Abstract
To overcome disadvantages of conventional two interconnected fluidized beds system, a novel two-interconnected fluidized bed process has been adopted to 3kW chemical-looping combustor. This system has two bubbling beds, solid injection nozzles, solid conveying lines, and downcomers. In this study, effects of operating variables such as gas velocity through the solid injection nozzle, fluidizing velocity, solid height, geometry of solid intake hole, bed temperature on solid circulation rate have been investigated in a 3kW chemical-looping combustor. The solid circulation rate increased as the solid height and the opening area of solid intake holes increased. The effect of the fluidizing velocity and the bed temperature were negligible. Moreover, long-term operation of continuous solid circulation up to 50 hours has been performed to check feasibility of stable operation. The pressure drop profiles in the bubbling beds and the downcomers were maintained steadily and solid circulation was smooth and stable.
Keywords
Chemical-looping Combustion; Solid Circulation; Bubbling-bubbling Bed; Long-term Operation;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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