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Start-up Strategy of Multi-Stage Burner for Methanol Fuel Reforming Plant

메탄올 연료 개질 플랜트의 다단연소기 시동 전략

  • Received : 2019.02.25
  • Accepted : 2019.06.30
  • Published : 2019.06.30

Abstract

Recently, a fuel reforming plant for supplying high purity hydrogen is being applied to submarines. Since steam reforming is an endothermic reaction, it is necessary to continuously supply heat to the reactor. A fuel reforming plant for a submarine needs a multi-stage burner (MSB) to acquire heat and convert the combustion gas to $CO_2+H_2O$. The MSB has problems that the combustion imbalance occurs during start-up due to the temperature restriction of the combustion gas. This problems can be solved by burning $H_2O$ together with fuel and $O_2$. In this study, the simulation results of MSB were analyzed to determine the optimum flow rate of $H_2O$ supplied to the 6-stage burner. When the flow rate of $H_2O$ was low, combustion was concentrated on the burner#6 in comparison with the burner#1-#5. This combustion concentration improved as the supply amount of $H_2O$ increased. As a results, it was necessary to supply at least 4.9 kmol/h of $H_2O$ (per 1 kmol/h of fuel) to burner#1 in order to maintain the combustion gas temperature of each stage at $750^{\circ}C$ and to convert the final stage burner gas composition to $CO_2+H_2O$.

Keywords

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Fig. 1. Configuration of multi-stage burner for fuel reforming plant

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Fig. 2. ASPEN plus model for multi-stage burner

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Fig. 3. MeOH mole flow rate (kmol/h) at each mixer as function of H2O feed rate (kmol/h) at mixer#1

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Fig. 4. O2 mole flow rate (kmol/h) at each mixer as function of H2O feed rate (kmol/h) at mixer#1

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Fig. 5. CO2 mole flow rate (kmol/h) at each mixer as function of H2O feed rate (kmol/h) at mixer#1

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Fig. 7. Exhaust gas temperature at burner#6 as function of H2O feed rate (kmol/h) at mixer#1

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Fig. 6. H2O mole flow rate (kmol/h) at each mixer as function of H2O feed rate (kmol/h) at mixer#1

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Fig. 8. H2O temperature at each HEX as function of H2O feed rate (kmol/h) at mixer#1

Table 1. Simulation condition for multi-stage burner

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References

  1. A. Psoma and G. Sattler, "Fuel cell systems for submarines: from the first idea to serial production", Journal of Power Sources, Vol. 106, No. 1-2, 2002, pp. 381-383, doi: https://doi.org/10.1016/S0378-7753(01)01044-8.
  2. S. Krummrich and J. Llabres, "Methanol reformer - The next milestone for fuel cell powered submarines", International Journal of Hydrogen Energy, Vol. 40, No. 15, 2015, pp. 5482-5486, doi: https://doi.org/10.1016/j.ijhydene.2015.01.179.
  3. "HDW, SENER develop methanol reformer for fuel cell-submarines", Fuel Cells Bulletin, Vol. 2012, No. 12, 2012, p. 2, doi: https://doi.org/10.1016/S1464-2859(12)70342-5.
  4. "UTC Power to develop fuel cell for Spanish sub", Fuel Cells Bulletin, Vol. 2008, No. 1, 2008, p. 4, doi: https://doi.org/10.1016/S1464-2859(08)70009-9.
  5. S. Springmann, M. Bohnet, A. Docter, A. Lamm, and G. Eigenberger, "Cold start simulations of a gasoline based fuel processor for mobile fuel cell applications", Journal of Power Sources, Vol. 128, No. 1, 2004, pp. 13-24, doi: https://doi.org/10.1016/j.jpowsour.2003.09.038.
  6. S. G. Goebel, D.P. Miller, W. H. Pettit, and M.D. Cartwright, "Fast starting fuel processor for automotive fuel cell systems", International Journal of Hydrogen Energy, Vol. 30, No. 9, 2005, pp. 953-962, doi: https://doi.org/10.1016/j.ijhydene.2005.01.003.
  7. M. Maximini, P. Engelhardt, M. Brenner, F. Beckmann, and O. Moritz, "Fast start-up of a diesel fuel processor for PEM fuel cells", International Journal of Hydrogen Energy, Vol. 39, No. 31, 2014, pp. 18154-18163, doi: https://doi.org/10.1016/j.ijhydene.2014.02.168.
  8. H. Ji, J. Bae, S. Cho, and I. Kang, "Start-up strategy and operational tests of gasoline fuel processor for auxiliary power unit", International Journal of Hydrogen Energy, Vol. 40, No. 11, 2015, pp. 4101-4110, doi: https://doi.org/10.1016/j.ijhydene.2015.01.157.
  9. H. Ji and S. Cho, "Steam-to-carbon ratio control strategy for start-up and operation of a fuel processor", International Journal of Hydrogen Energy, Vol. 42, No. 15, 2017, pp. 9696-9706, doi: https://doi.org/10.1016/j.ijhydene.2017.01.153.
  10. R. C. Samsun, M. Prawitz, A. Tschauder, J. Pasel, P. Pfeifer, R. Peters, and D. Stolten, "An integrated diesel fuel processing system with thermal start-up for fuel cells", Applied Energy, Vol. 226, 2018, pp. 145-159, doi: https://doi.org/10.1016/j.apenergy.2018.05.116.
  11. H. Ji, J. Lee, E. Choi, and I. Seo, "Hydrogen production from steam reforming using an indirect heating method", International Journal of Hydrogen Energy, Vol. 43, No. 7, 2018, pp. 3655-3663, doi: https://doi.org/10.1016/j.ijhydene.2017.12.137.
  12. U. Cheon, K. Ahn, and H. Shin, "Study on the characteristics of methanol steam reformer using latent heat of steam", Trans. of the Korean Hydrogen and New Energy Society, Vol. 29, No. 1, 2018, pp. 19-24, doi: https://doi.org/10.7316/KHNES.2018.29.1.19.
  13. H. Ji, E. Choi, and J. Lee, "Optimal operation condition of pressurized methanol fuel processor for underwater environment", Trans. of the Korean Hydrogen and New Energy Society, Vol. 27, No. 5, 2016, pp. 485-493, doi: http://dx.doi.org/10.7316/KHNES.2016.27.5.485.
  14. S. Rupesh, C. Muraleedharan, and P. Arun, "ASPEN plus modelling of air-steam gasification of biomass with sorbent enabled $CO_2$ capture", Resource-Efficient Technologies, Vol. 2, No. 2, 2016, pp. 94-103, doi: https://doi.org/10.1016/j.reffit.2016.07.002.