Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Hydrogen Generation Characteristics of SMART System with Inherent $CO_2/H_2$ Separation

$CO_2/H_2$ 원천분리 SMART 시스템의 수소생산특성

  • Ryu, Ho-Jung (Zero Emission Technology Research Center, Korea Institute of Energy Research)
  • 류호정 (한국에너지기술연구원 제로에미션연구센터)
  • Published : 2007.12.15
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Abstract

To check the feasibility of SMART(Steam Methane Advanced Reforming Technology) system, an experimental investigation was performed. A fluidized bed reactor of diameter 0.052m was operated cyclically up to 10th cycle, alternating between reforming and regeneration conditions. FCR-4 catalyst was used as the reforming catalyst and calcined limestone(domestic, from Danyang) was used as the $CO_2$ absorbent. Hydrogen concentration of 98.2% on a dry basis was reached at $650^{\circ}C$ for the first cycle. This value is much higher than $H_2$ concentration of 73.6% in the reformer of conventional SMR (steam methane reforming) condition. The hydrogen concentration decreased because the $CO_2$ capture capacity decreased as the number of cycles increased. However, the average hydrogen concentration at 10th cycle was 82.5% and this value is also higher than that of SMR. Based on these results, we could conclude that the SMART system can replace SMR system to generate pure hydrogen without HTS (high tempeature shift), LTS (low temperature shift) and $CO_2$ separation process.

Keywords

References

  1. H. J. Ryu and G. T. Jin, 'Performance Estimation and Process Selection for Chemical-Looping Hydrogen Generation System', Trans. of the Korean Hydrogen and New Energy Society, Vol. 16, No. 3, 2005, pp. 209-218
  2. K. Johnsen, H. J. Ryu, J. R. Grace and C. J. Lim, 'Sorption-enhanced Steam Reforming of Methane in a Fluidized Bed Reactor with Dolomite as $CO_2$-acceptor', Chem. Eng. Sci., Vol. 61, 2006, pp. 1195-1202 https://doi.org/10.1016/j.ces.2005.08.022
  3. IEA report, 'Prospects for Hydrogen and Fuel Cells', IEA Books, 2005, pp. 49-55
  4. H. J. Ryu, 'Process Design and Selection of Operating Conditions for SMART System', Trans. of the Korean Hydrogen and New Energy Society, Vol. 18, No. 1, 2007, pp. 1-11
  5. Y. C. Bak and K. J. Cho, 'Status for the Technology of Hydrogen Production from Natural Gas', Korean Chem. Eng. Res., Vol. 43, No. 3, 2005, pp. 344-351
  6. D. J. Moon and B. K. Lee, 'R&D Trends and Unit Process of Hydrogen Station', Korean Chem. Eng. Res., Vol. 43, No. 3, 2005, pp. 331-343
  7. C. Salvador, D. Lu, E. J. Anthony and J. C. Abanades, 'Enhancement of CaO for $CO_2$ Capture in an FBC Environment', Chem. Eng. J., Vol. 96, 2003, pp. 187-195 https://doi.org/10.1016/j.cej.2003.08.011
  8. H. J. Ryu, J. R. Grace, C. J. Lim, 'Simultaneous $CO_2/SO_2$ Capture Characteristics of Three Limestones in a Fluidized Bed Reactor', Energy & Fuels, Vol. 20, 2006, pp. 1621-1628 https://doi.org/10.1021/ef050277q