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Experimental Study of Steam Reforming Assisted by Catalytic Combustion in Concentric Annular Reactor

촉매연소를 이용한 동심 원관형 반응기 내의 수증기 개질 반응에 관한 실험적 연구

  • Published : 2010.04.01

Abstract

In this paper, the heat-transfer characteristics of steam reforming in an annular reactor are presented. Heat is supplied by the catalytic combustion of syn-gas. The thermal behaviors of exothermic and endothermic reactions in a directly coupled concentric-tube packed-bed reactor were investigated experimentally. The gas mixture supplied for catalytic combustion consisted of the off-gas emitted from MCFC anode. Methane in steam at a suitable S/C (steam-to-carbon) ratio was used in the reforming reactions. On the basis of the experimental results, a simple simulation was performed to predict the temperature profile required in the reforming side of the reactor to achieve optimum hydrogen yield. The results of this study may be utilized as reference data in future studies for further development of coupled reactors.

촉매연소를 열원으로 하여 수증기 개질 반응을 수행하는 동심 2중관 원관형 반응기에서의 반응 및 열전달 특성을 제시하였다. 동심 2중관 반응기는 각각 연소 촉매와 개질 촉매가 장입된 충전층 반응기로 제작하였으며 개질 반응인 흡열 반응과 발열 반응인 연소 반응의 열적 거동을 실험적으로 연구하였다. 연소용 혼합 가스는 MCFC(용융탄산염 연료전지) 연료극에서 슬립(slip)되는 합성가스를 성분별로 용량에 맞게 공급 하였으며, 개질 반응에서는 적당한 수증기/탄소비를 고정하여 실험하였다. 이 연구를 토대로 수소 생산량이 최대가 되는 개질 측 반응 온도분포를 예측하기 위한 반 경험적 고찰을 수행하였고 이는 장차 이 연구에서와 같은 연소반응과 개질반응이 복합된 수소생산용 개질기에 대한 기본설계 지침을 제시할 수 있을 것이다.

Keywords

References

  1. Kim, K. B., Jung, H. L., Oh, C. K., 2008, "Stuides on a Micro Reformer System with a Two-staged Micro Combustor," Trans. of the Korean Hydrogen and New Energy Society, Vol. 19, No. 3, pp. 217-225.
  2. Park, J. G., Lee, S. H., Lim, S. K. and Bae, J. M., 2009, "Numerical Study on Operating Parameters and Shapes of a Steam Reformer for Hydrogen Production from Methane," Trans of the KSME(B), Vol. 33, No. 1. pp. 60-67. https://doi.org/10.3795/KSME-B.2009.33.1.60
  3. KOGAS, 2002, "Synthesis of the Hydrogen from Natural Gas," Final Research Report, pp. 16-25.
  4. Xu, J., Froment, G. F., 1989, "Methan Steam Reforming, Mathanation and Water-Gas Shift-1," AIchE Journal, Vol. 35, No. 1.
  5. Hayes, R. E., Kolaczkowski, S. T., 1997, "Introduction to Catalytic Combustion," pp. 401-422.

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  3. Thermal Behaviors and Reaction Characteristics of an Integrated Reactor with Catalytic Combustion-Reforming According to Operation Conditions vol.35, pp.6, 2011, https://doi.org/10.3795/KSME-B.2011.35.6.641