Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
권호 표지

Effects of Steam and Temperature on CO2 Capture Using A Dry Regenerable Sorbent in a Bubbling Fluidized Bed

기포 유동층 반응기에서 건식 재생 흡수제를 이용한 이산화탄소 회수에 미치는 스팀 및 온도의 영향

  • Seo, Yongwon (Clean Energy Research Center, Korea Institute of Energy Research) ;
  • Moon, Young Sub (Clean Energy Research Center, Korea Institute of Energy Research) ;
  • Jo, Sung-Ho (Clean Energy Research Center, Korea Institute of Energy Research) ;
  • Ryu, Chong Kul (Global Environmental Group, Korea Electric Power Research Institute) ;
  • Yi, Chang-Keun (Clean Energy Research Center, Korea Institute of Energy Research)
  • 서용원 (한국에너지기술연구원 청정에너지연구센터) ;
  • 문영섭 (한국에너지기술연구원 청정에너지연구센터) ;
  • 조성호 (한국에너지기술연구원 청정에너지연구센터) ;
  • 류청걸 (전력연구원 지구환경그룹) ;
  • 이창근 (한국에너지기술연구원 청정에너지연구센터)
  • Received : 2005.03.25
  • Accepted : 2005.06.15
  • Published : 2005.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

A bubbling fluidized bed reactor was used to study $CO_2$ capture from flue gas using a sodium-based dry regenerable sorbent, sorbA which was manufactured by Korea Electric Power Research Institute. A dry sorbent, sorbA, consists of $Na_2CO_3$ for absorption and supporters for mechanical strength. $CO_2$ capture was effective in the lower temperature range of $50-70^{\circ}C$, while regeneration occurred in the range of $120-300^{\circ}C$. To increase initial $CO_2$ removal, some amount of steam was absorbed in the sorbents before injecting simulated flue gas. It was possible to remove most $CO_2$ for 1-2 minutes at $50^{\circ}C$ and residence time of 2 seconds with steam pretreatment. Little or no reduction in initial reaction rate and capture capacity was observed in multicycle tests. The carbonated and regenerated sorbent samples were analyzed by NMR to confirm the extent of reaction. The results obtained in this study can be used as basic data for the scale-up design and operation of the $CO_2$ capture process with two fluidized bed reactors.

본 연구에서는 전력연구원으로부터 공급받은 건식 흡수제인 sorbA를 이용하여 기포 유동층 반응기에서 $CO_2$ 흡수반응 특성을 살펴보았다. sorbA는 $CO_2$ 흡수를 위한 탄산나트륨과 내마모성과 기계적 강도를 위한 지지체로 구성되어 있다. $CO_2$ 흡수는 $50-70^{\circ}C$의 온도 범위에서, 재생은 $120-300^{\circ}C$의 온도 범위에서 이루어졌다. 반응시작 전 sorbA에 일정량의 물을 미리 함유하게 한 경우, $50^{\circ}C$에서 반응 초기 1-2분 동안 100％의 $CO_2$ 제거율을 보였다. 고온에서 재생되는 경우 반복 실험으로 인한 흡수제의 반응성과 제거 용량의 저하는 없었다. NMR 스펙트럼을 통해서 흡수반응과 재생반응 후 시료의 성분을 파악하였다. 본 연구에서 얻어진 결과는 두 개의 유동층 반응기를 가진 연속장치의 설계와 운전에 중요한 기초자료가 될 것이다.

Keywords

Acknowledgement

Grant : 이산화탄소 저감 및 처리 기술개발

Supported by : 과학기술부

References

  1. Hoffman, J. S. and Pennline, H. W., 'Investigation of $CO_{2}$ Capture Using Regenerable Sorbents,' 17th Annual Int'l Pittsburgh Coal Conference, Pittsburgh, U.S.A(2000)
  2. Green, D. A., Turk, B. S., Gupta, R. P., Lopez-Ortiz, A., Harrison, D. P. and Liang, Y., 'Carbon Dioxide Capture from Flue Gas Using Dry Regenerable Sorbents,' Quarterly Technical Progress Report, DOE Cooperative Agreement No.: DE-FC26-00NT40923, US DOE(2001)
  3. Granite, E. J. and Pennline, H. W., 'A Review of Novel Methods for Separation of Carbon Dioxide from Flue and Fuel Gases,' 20th Annual Int'l Pittsburgh Coal Conference, Pittsburgh, U.S.A (2003)
  4. Ryu, C. K., Lee, J. B., Oh, J. M. and Yi, C. K., 'Dry Regenerable Sorbents for $CO_{2}$ Capture from Flue Gas,' 20th Annual Int'l Pittsburgh Coal Conference, Pittsburgh, U.S.A(2003)
  5. Yi, C. K., Jo, S. H., Ryu, H. J., Yoo, Y. W., Lee, J. B. and Ryu, C. K., '$CO_{2}$ Reaction Characteristics of Dry Regenerable Sorbents in Fluidized Reactors,' 7th International Conference on Greenhouse Gas Control Technologies, Vancouver, Canada(2004)
  6. Liang, Y., Harrison, D. P., Gupta, R. P., Green, D. A. and McMichael, W. J., 'Carbon Dioxide Capture Using Dry Sodium-Based Sorbents,' Energy&Fuels, 18(2), 569-575(2004) https://doi.org/10.1021/ef030158f
  7. Kunii, D. and Levenspiel, O., Fluidization Engineering, 2nd ed., Butterworth-Heinemann, Boston, U.S.A(1991)
  8. Seo, Y. and Lee, H., 'Phase Behavior and Structure Identification of the Mixed Chlorinated Hydrocarbon Clathrate Hydrates,' J. Phys. Chem. B, 106(37), 9668-9673(2002) https://doi.org/10.1021/jp025685z