Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effects of Regeneration Conditions on Sorption Capacity of CO2 Dry Potassium Sorbent During Carbonation

재생반응 조건이 CO2 건식 K-계열 흡수제의 흡수능력에 미치는 영향

  • Kim, Yunseop (Greenhouse Gas Laboratory, Korea Institute of Energy Research) ;
  • Park, Young Cheol (Greenhouse Gas Laboratory, Korea Institute of Energy Research) ;
  • Jo, Sung-Ho (Greenhouse Gas Laboratory, Korea Institute of Energy Research) ;
  • Ryu, Ho-Jung (Greenhouse Gas Laboratory, Korea Institute of Energy Research) ;
  • Rhee, Young Woo (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Yi, Chang-Keun (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
  • 김윤섭 (한국에너지기술연구원 온실가스연구실) ;
  • 박영철 (한국에너지기술연구원 온실가스연구실) ;
  • 조성호 (한국에너지기술연구원 온실가스연구실) ;
  • 류호정 (한국에너지기술연구원 온실가스연구실) ;
  • 이영우 (충남대학교 에너지과학기술대학원) ;
  • 이창근 (한국에너지기술연구원 온실가스연구실)
  • Received : 2014.09.19
  • Accepted : 2014.10.02
  • Published : 2015.06.01
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Abstract

In this study, we investigated carbonation-regeneration and agglomeration characteristics of dry sorbents. Experiment has been proceeded in the batch-type reactor, which is made of quartz: 0.05 m of I.D and 0.8 m in height. The sorbents that is collected at the cyclone of the carbonation reactor of continuous process were used in this study. The reactivity was studied at the various concentrations of water vapor, $N_2$ and $CO_2$ in the fluidizing gas at regeneration reaction. As a result, the reactivity increased as the regeneration temperature increased, the reactivity decreased as the concentration of water vapor increased. The absorption capacity showed the highest value in case of using $N_2$ 100% as regeneration gas. And decreased in order of $H_2O+N_2$, $CO_2$ 100% and $H_2O+CO_2$. The agglomeration characteristics were investigated according to the particle sizes and concentrations of water vapor at carbonation reaction. As a result, the particle with smaller size and higher concentration of water vapor showed the higher agglomeration characteristic.

본 연구에서는 재생가스조성에 따른 건식 흡수제의 재생률, $CO_2$ 흡수능 그리고 응집 특성에 관한 연구를 실시하였다. 실험은 내경 0.05 m, 높이 0.8 m이며 석영으로 제작된 회분식 기포 유동층 반응기에서 수행되었으며 흡수제는 연속공정의 흡수반응기 후단에서 채취한 입자를 사용하였다. 반응성에 관한 연구는 재생반응 유동화 기체의 조성을 $CO_2$, $H_2O$, $N_2$의 농도를 다양하게 변화시키며 수행하였다. 실험결과 재생온도가 증가함에 따라 흡수반응 동안의 흡수능이 증가하는 경향을 나타내었으며 재생기체에 포함된 수분의 함량이 증가함에 따라 흡수능이 다소 감소하는 경향을 나타내었다. 재생반응기체로 $N_2$ 100%를 사용한 경우 흡수반응 동안의 흡수능이 가장 높게 나타났으며, ($H_2O+N_2$)를 사용한 경우, $CO_2$ 100%를 사용한 경우, ($H_2O+CO_2$)를 사용한 경우 순으로 흡수능이 감소하는 경향을 나타내었다. 또한, 응집특성에 관한 연구는 흡수제의 입자크기 변화와 흡수반응기체에 포함된 수분의 농도가 응집에 미치는 영향을 살펴보았다. 실험결과 수분함량이 높고 입자크기가 작을수록 응집입자가 많이 생성되는 것으로 나타났다.

Keywords

References

  1. Wuebbles, D. J. and Jain, A. K., "Concerns about Climiate Change and The Role of Fossil Fuel Use," Fuel Process. Technol., 71, 99-119(2001). https://doi.org/10.1016/S0378-3820(01)00139-4
  2. Mavroudi, M., Kaldis, S. P. and Sakellaropoulos, G. P., "Reduction of $CO_2$ Emissions by a Membrane Contacting Process," Fuel, 82, 2153-2159(2003). https://doi.org/10.1016/S0016-2361(03)00154-6
  3. Zhao, C., Chen, X. and Zhao, C., "$CO_2$ Absorption Using Dry Pottassium-Based Sorbents with Different Supports," Energy Fuels, 23, 4683-4687(2009). https://doi.org/10.1021/ef900182d
  4. Metz, B., Davidson, O., de Coninck, H., Loos, M. and Meyer, L., "IPCC Special Report on Carbon Dioxide Capture and Storage," New York(2005).
  5. Hoffman, J. S. and Pennline, H. W., "Investgation of $CO_2$ Capture Using Regenerable Sorbents," The Proceedings of 17th Annual International Pittsburgh Coal Conference(2000).
  6. Yi, C. K., Hong, S. W., Jo, S. H., Son, J. E. and Choi, J. H., "Absorption and Regeneration Characteristics of a Sorbent for Fluidized-Bed $CO_2$ Removal Process," Korean Chem. Eng. Res., 43(2), 294-298(2005).
  7. Yi, C. K., "Advances of Carbon Capture Technology," Climate Change Technology Research(2009).
  8. Liang, Y. and Harrision, D. P., "Carbon Dioxide Capture Using Dry Sodium-Based Sorbents," Energy Fuels, 18, 569-575(2004). https://doi.org/10.1021/ef030158f
  9. Seo, Y. W., Moon, Y. S., Jo, S. H., Ryu, C. K. and Yi, C. K., "Effects of Steam and Temperature on $CO_2$ Capture Using A Dry Regenerable Sorbent in a Bubbling Fluidized Bed," Korean Chem. Eng. Res., 43(4), 537-541(2005).
  10. Park, K. W., Park, Y. S., Park, Y. C., Jo, S. H. and Yi, C. K., "Study of $CO_2$ Carbonation-Regeneration Characteristics of Potassium- Based Dry Sorbents According to Water Vapor Contents of Inlet Gas and Regneration Temperature in the Cycle Experiments of Bubbling Fluidized-Bed Reactor," Korean Chem. Eng. Res., 47(3), 349-354(2009).
  11. Kim, K. C., Kim. K. Y., Park, Y. C., Jo, S. H., Ryu, H. J. and Yi, C. K., "Study of Hydrodynamics and Reaction Characteristics of K-based Solid Sorbents for $CO_2$ Capture in a Continuous System Composed of Two Bubbling Fluidized-bed Reactors," Korean Chem. Eng. Res., 48(4), 499-505(2010).
  12. Kim, K. C., Park, Y. C., Jo, S. H. and Yi, C. K., "The Effect of $CO_2$ or Steam Partial Pressure in The Regeneration of Solid Sorbents on The $CO_2$ Capture Efficiency in The Two-interconnected Bubbling Fluidized-beds System," Korean J. Chem. Eng., 28(10), 1986-1989(2011). https://doi.org/10.1007/s11814-011-0054-0
  13. Lee, D. Y., Kim, K. C., Park, Y. C., Han, M. H. and Yi, C. K., "Analysis of $CO_2$ Capture Efficiency in Relation to the Inlet Moisture Content of the Regenerator in the Continuous Process by using Sorbent Analysis," Korean Chem. Eng. Res., 50(4), 654-658(2012). https://doi.org/10.9713/kcer.2012.50.4.654
  14. Yasyerli, S., Dogu, G., Ar, I. and Dogu, T., "Breakthrough Analysis of H2S Removal on Cu-V-Mo, Cu-V, and Cu-Mo Mixed OXides," Chem. Eng. Comm., 190(5), 1055-1072(2003). https://doi.org/10.1080/00986440302101
  15. Ramachandran, P. A. and Kulkarni, B. D., "Approximate Analytical Solution to Gas-Solid Noncatalytic Reaction Problem," Ind. Eng. Chem. Res. Process Des. Dev., 19(4), 717-719(1980). https://doi.org/10.1021/i260076a036
  16. Seo, Y. W., Jo, S. H., Ryu, H. J., Bae, D. H., Ryu, C. K. and Yi, C. K., "Effect of Water Pretreatment on $CO_2$ Capture Using a Potassium-based Solid Sorbent in a Bubbling Fluidized Bed Reactor," Korean J. Chem. Eng., 24(3), 457-460(2007). https://doi.org/10.1007/s11814-007-0079-6

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