Browse > Article
http://dx.doi.org/10.9713/kcer.2014.52.4.522

Comparison of Solid Circulation Characteristics with Change of Lower Loop Seal Geometry in a Circulating Fluidized Bed  

Lee, Dong-Ho (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Jo, Sung-Ho (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Jin, Gyoung-Tae (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Yi, Chang-Keun (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Ryu, Ho-Jung (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Park, Seung Bin (Department of Chemical and Biomolecular Engineering, KAIST)
Publication Information
Korean Chemical Engineering Research / v.52, no.4, 2014 , pp. 522-529 More about this Journal
Abstract
Circulating fluidized bed system consists of SEWGS reactor - lower loop seal - regeneration reactor - riser - cyclone - upper loop seal has been used for solid circulation between the SEWGS reactor and the regeneration reactor in a SEWGS system for pre-combustion $CO_2$ capture. A vertical type lower loop seal has been used in current system but this lower loop seal requires high gas flow rate through the lower loop seal for fluidization and smooth solid circulation, and consequently, causes slugging behavior sometimes. To overcome these disadvantages, inclined type lower loop seal was proposed by this study. Solid circulation characteristics with change of lower loop seal geometry were measured and compared in a bubbling - bubbling - riser type circulating fluidized bed using $CO_2$ absorbent (P-78) as bed material at ambient temperature and pressure. We could conclude that the inclined lower loop seal is better than the vertical type lower loop seal from the viewpoints of minimum flow rate requirement for stable solid circulation and solid height change during solid circulation.
Keywords
SEWGS; Circulating Fluidized Bed; $CO_2$ Absorbent; Solid Circulation Rate; Lower Loop Seal; Minimum Flow Rate;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
연도 인용수 순위
1 Cheng, L. and Basu, P., "Effect of Pressure on Loop Seal Operation for a Pressurized Circulating Fluidized Bed," Powder Technol., 103, 203-211(1999).   DOI   ScienceOn
2 Ryu, H. J., Park, Y. C., Jo, S. H. and Park, M. H., "Development of Novel Two-Interconnected Fluidized Bed System," Korean J. Chem. Eng., 25(5), 1178-1183(2008).   과학기술학회마을   DOI   ScienceOn
3 Basu, P. and Butler, J., "Studies on the Operation of Loop-seal Circulating Fluidized Bed Boilers," Applied Energy, 86, 1723-1731(2009).   DOI   ScienceOn
4 Basu, P. and Cheng, L., " An Analysis of Loop Seal Operations in a Circulating Fluidized Bed," Tran ICHemE, 78(part A), 991-998(2000).   DOI   ScienceOn
5 Namkung, W. and Cho, M. Y., "Loop-seal Operation of Iron Ore Particles in Pneumatic Conveying," Korean J. Chem. Eng., 19(6), 1066-1071(2002).   과학기술학회마을   DOI   ScienceOn
6 Ryu, H. J., Lee, D. H., Moon, J. H., Park Y. C. and Jo, S. H., "The Characteristics of Attrition of Absorbents for Pre-combustion $CO_2$ Capture," Trans. of the Korean Hydrogen and New Energy Society, 24(5), 428-436(2013).   과학기술학회마을   DOI   ScienceOn
7 Ryu, H. J., Yoon, J. Y., Lee, D. H., Shun, D. W., Park, J. Y. and Park, Y. S., "Hydrodynamic Characteristics of Absorbent and Catalyst for Pre-combustion $CO_2$ Capture," Clean Technology, 19(4), 437-445(2014).   과학기술학회마을   DOI   ScienceOn
8 Lee, K. B., Beaver, M. G., Caram, H. S., Sircar, S., "Performance of$Na_2O$ Promoted Alumina as $CO_2$ Chemisorbent in Sorption-enhancedReaction Process for Simultaneous Production of Fuel-cell Grade$H_2$ and Compressed $CO_2$ from Synthesis Gas," J. Power Sources,176, 312-319(2008).   DOI   ScienceOn
9 James, R., "Clean Coal technology Status: $CO_2$ Capture and Storage," Technology Briefing for Colorado Rural Electric Association, EPRI(2007).
10 Ryu, H. J., "Selection of Process Configuration and Operating Conditions for SEWGS System," Trans. of the Korean Hydrogen and New Energy Society, 20(2), 168-178(2009).   과학기술학회마을
11 Ryu, H. J., Hyun, J. S., Kim, H. and Hwang, T. S., "Reaction Characteristics of WGS Catalyst with Fraction of Catalyst in a Batch Type Fluidized Bed Reactor," Trans. of the Korean Hydrogen and New Energy Society, 22(4), 465-473(2011).   과학기술학회마을
12 Lee, J. B., Min, Y. J., Lee, K. B., Jeon, S. G., Na, J. G. and Ryu, H. J., "Enhancement of $CO_2$ Sorption Uptake on Hydrotalcite by Impregnation with $K_2CO_3$," Langmuir, 26(24), 18788-18797(2010).   DOI   ScienceOn
13 Lee, J. B., Eom, T. H., Choi, D. H., Park, K. W., Ryu, J., Baek, J. I., Ryu, C. K. and Ryu, H. J., "Study on Hybrid Materials of WGS Cataylst and $CO_2$ Sorbent for SEWGS Process," International Symposium on Low Carbon & Renewable Energy Technology, Lotte Hotel, Jeju, Korea, 372(2010).
14 Ryu, H. J., Kim H. S., Lee, S. Y., Lee, D. H. and Kim, J. V., "Effects of Operating Variables on Sorption Capacity of $CO_2$ Absorbent for SEWGS Process," Korean Chem. Eng. Res., 50(6), 994-1001(2012).   과학기술학회마을   DOI   ScienceOn
15 Ryu, H. J., Lee, D. H., Lee, S. Y. and Hwang T. S., "Reaction Characteristics of WGS Catalyst for SEWGS Process in a Pressurized Fluidized Bed Reactor," Trans. of the Korean Hydrogen and New Energy Society, 23(4), 337-345(2012).   과학기술학회마을   DOI   ScienceOn
16 Kim, S. W. and Kim, S. D., "Effects of Properties on Solids Recycle in Loop-seal of a Circulating Fluidized Bed," Powder Technol., 124, 76-84(2002).   DOI   ScienceOn
17 Kim, S. W., Namkung, W. and Kim., S. D., "Solid recycle Characteristics of Loop-seals in a Circulating Fluidized Bed," Chem. Eng. Technol., 24(8), 843-849(2001).   DOI