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http://dx.doi.org/10.7464/ksct.2011.17.1.069

Conceptual Design and Hydrodynamic Properties of a Moving Bed Reactor for Intrinsic $CO_2$ Separation Hydrogen Production Process  

Park, Dong-Kyoo (Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology (KAIST))
Cho, Won-Chul (Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology (KAIST))
Seo, Myung-Won (Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology (KAIST))
Go, Kang-Seok (Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Sang-Done (Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology (KAIST))
Kang, Kyoung-Soo (Hydrogen Production Research Center, Korea Institute of Energy Research (KIER))
Park, Chu-Sik (Hydrogen Production Research Center, Korea Institute of Energy Research (KIER))
Publication Information
Clean Technology / v.17, no.1, 2011 , pp. 69-77 More about this Journal
Abstract
The intrinsic $CO_2$ separation and hydrogen production system is a novel concept using oxidation and reduction reactions of oxygen carrier for both $CO_2$ capture and high purity hydrogen production. The process consists of a fuel reactor (FR), a steam reactor (SR) and an air reactor (AR). The natural gas ($CH_4$) is oxidized to $CO_2$ and steam by the oxygen carrier in FR, whereas the steam is reduced to hydrogen by oxidation of the reduced oxygen carrier in SR. The oxygen carrier is fully oxidized by air in AR. In the present study, the chemical looping moving bed reactor having 200 L/h hydrogen production capacity is designed and the hydrodynamic properties were determined. Compared with other reactors, two moving bed reactors (FR, SR) were used to obtain high conversion and selectivity of the oxygen carrier. The desirable solid circulation rates are calculated to be in the range of $20{\sim}100kg/m^2s$ from the conceptual design. The solid circulation rate can be controlled by aeration in a loop-seal. To maintain the gas velocity in the moving beds (FR, SR) at the minimum fluidization velocity is found to be suitable for the stable operation. The solid holdup in moving beds decrease with increasing gas velocity and solid circulation rate.
Keywords
Intrinsic $CO_2$ separation; Hydrogen production process; Conceptual design; Moving bed; Hydrodynamics;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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