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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Direct Combustion Characteristics of Coal by Oxygen Carrier

산소공여입자에 의한 석탄의 직접연소 특성

  • Received : 2014.01.24
  • Accepted : 2014.02.28
  • Published : 2014.02.28
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Abstract

Direct combustion characteristics of coal and oxygen carrier were measured in the thermogravimetric analyzer using four coals and two different oxygen carriers. The direct combustion efficiency decreased in order of Roto, Kideco, Sunhwa and Hyper coal for both oxygen carriers. Moreover, OCN703-1100 oxygen carrier showed better combustion efficiency than OCN706-1100 oxygen carrier for all four coals. The reduction characteristics of two oxygen carriers for $CH_4$, CO and $H_2$ gases were measured in the thermogravimetric analyzer to investigate why OCN703-1100 oxygen carrier showed better combustion efficiency than OCN706-1100 for all coals. The OCN703-1100 oxygen carrier represented higher reduction rate than OCN706-1100 for all reducing gases. Moreover, the total pore area and the porosity of OCN703-1100 were higher than those of OCN706-1100 oxygen carrier. The total volatile gas and volatile components of four coals were measured in a batch type fluidized bed reactor to investigate why the direct combustion efficiency decreased in order of Roto, Kideco, Sunhwa and Hyper coal for both oxygen carriers. The direct combustion efficiency was proportional to the total amount of ($CH_4+CO+H_2$) produced during devolatilization of coals.

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References

  1. H. J. Ryu, S. S. Park, D. H. Lee, W. K. Choi and Y. W. Rhee, "Method for Improvement of Reduction Reactivity at High Temperature in a Chemical-looping Combustor", Korean Chem. Eng. Res., Vol. 50, No. 5, 2012, pp. 843-849. https://doi.org/10.9713/kcer.2012.50.5.843
  2. S. S. Park, D. H. Lee, W. K. Choi, H. J. Ryu and Y. W. Rhee, "Syngas Combustion Characteristics of Oxygen Carrier Particle in a Pressurized Fluidized Bed Reactor", Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, No. 1, 2012, pp. 83-92. https://doi.org/10.7316/khnes.2012.23.1.083
  3. H. J. Ryu, Y. J. Kim, Y. S. Park and M. H. Park, "Reaction Characteristics of Coal and Oxygen Carrier Particle in a Thermogravimetric Analyzer", Trans. of the Korean Hydrogen and New Energy Society, Vol. 22, No. 2, 2011, pp. 213-222.
  4. H. J. Ryu, K. S. Kim, Y. S. Park, and M. H. Park, "Reduction Characteristics of Oxygen Carrier Particle for Chemical-looping Combustor with Different Fuels", Trans. of the Korean Hydrogen and New Energy Society, Vol. 20, No. 1, 2009, pp. 45-54.
  5. H. J. Ryu, and G. T. Jin, "Reactivity and Attrition Resistance of Three Oxygen Carrier Particles for Chemical-Looping Combustor", Trans. of the Korean Hydrogen and New Energy Society, Vol. 15, No. 3, 2004, pp. 208-219.
  6. H. J. Ryu, K. S. Kim, Y. S. Park, and M. H. Park, "Natural Gas Combustion Characteristics of Mass Produced Oxygen Carrier Particles for Chemical-Looping Combustor in a Batch Type Fluidized Bed Reactor", Trans. of the Korean Hydrogen and New Energy Society, Vol. 20, No. 2, 2009, pp. 151-160.
  7. H. J. Ryu, S. Y. Lee, H. K. Kim, and M. H. Park, "Effect of $CO_2$ concentration on Reduction Reactivity of Oxygen Carriers for Chemical-looping Combustor", Trans. of the Korean Hydrogen and New Energy Society, Vol. 20, No. 3, 2009, pp. 245-255.
  8. A. Lyngfelt, "Oxygen Carriers For Chemical-Looping Combuction-Operational Experience", 1st International Conference on Chemical Looping, March 17-19, IFP-Lyon, France, Available on CD, 2010.
  9. L. S. Fan, "Chemical Looping Processes", 1st International Conference on Chemical Looping, March 17-19, IFP-Lyon, France, Available on CD, 2010.
  10. J. Adanez, "Oxygen Carrier Materials for Chemicallooping Processes-Fundamentals", 1st International Conference on Chemical Looping, March 17-19, IFP-Lyon, France, Available on CD, 2010.
  11. H. J. Ryu, Y. J. Kim, Y. S. Park, and M. H. Park, "Reaction Characteristics of Coal and Oxygen Carrier Particle in a Thermogravimetric Analyzer", Trans. of the Korean Hydrogen and New Energy Society, Vol. 22, No. 2, 2011, pp. 213-222.
  12. N. Berguerand, N., Lyngfelt, A., Markstrom, P. and Linderholm, C., "Chemical Looping Combustion of Solid Fuels in a 10 kWth Pilot", 1st International Conference on Chemical Looping, March 17-19, IFP-Lyon, France, Available on CD(2010).
  13. L. Shen, J. Wu, Z. Gao, and J. Xiao, "Reactivity Deterioration of NiO/$Al_2O_3$ Oxygen Carrier for Chemical Looping Combustion of Coal in a 10 kWth Reactor", Combustion and Flame, Vol. 156, 2009, pp. 1377-1385. https://doi.org/10.1016/j.combustflame.2009.02.005
  14. K. T. Kim, K. H. Kim and G. S. Lee, "Gas Evolution Behavior in Slow Pyrolysis of Coal", HWAHAK KONGHAK, Vol. 26, No. 2, 1988, pp. 164-170.
  15. P. Gayan, A. Cabello, F. Garcia-Labiano, A. Abad, L. F. de Diego and J. Adanez, "Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/$Al_2O_3$ system as support", International Journal of Greenhouse Gas Control, Vol. 14, 2013, pp. 209-219. https://doi.org/10.1016/j.ijggc.2013.01.025

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