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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Solid Circulation and Reaction Characteristics of Mass Produced Particle in a 0.5 MWth Chemical Looping Combustion System

0.5 MWth 급 케미컬루핑 연소시스템에서 대량생산 입자의 고체순환 특성 및 반응 특성

  • Received : 2019.03.20
  • Accepted : 2019.04.30
  • Published : 2019.04.30
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Abstract

Continuous solid circulation test at high temperature and high pressure conditions and batch type reduction-oxidation tests were performed to check feasibility of a 0.5 MWth chemical looping combustion system. Pressure drop profiles were maintained stable during continuous solid circulation up to 16 hours. Therefore, we could conclude that the solid circulation between an air reactor and a fuel reactor could be smooth and stable. The measured fuel conversion and $CO_2$ selectivity were high enough even at high capacity and even after cyclic tests. Therefore, we could expect high reactivity of oxygen carrier at real operation condition.

Keywords

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Fig. 2. Microscopic images of (a) SC229-TD and (b) N016-R4 particles

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Fig. 3. Three dimensional view of 0.5 MWth chemical looping combustion system

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Fig. 4. Trends of pressure drop in the 0.5 MWth chemical looping combustion system during continuous solid circulation at high temperature and high pressure condition

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Fig. 5. Typical trends of (a) flow rates, (b) temperature, (c) relative concentration, (d) fuel conversion and CO2 selectivity during reduction reaction

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Fig. 6. Effect of capacity on fuel conversion and CO2 selectivity

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Fig. 7. Effect of the number of cycles on fuel conversion and CO2 selectivity

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Fig. 1. Conceptual diagram of chemical looping combustion system

Table 1. Summary of particle characteristics

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References

  1. H. J. Ryu, S. S. Park, J. H. Moon, W. K. Choi, and Y. W. Rhee, "Effects of Temperature, Pressure, and Gas Residence Time on Methane Combustion Characteristics of Oxygen Carrier Particle in a Pressurized Fluidized Bed Reactor", Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, No. 2, 2012, pp. 173-183, doi: https://doi.org/10.7316/KHNES.2012.23.2.173.
  2. 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, doi: https://doi.org/10.9713/kcer.2012.50.5.843.
  3. Y. Liu, Q. Guo, Y. Cheng, and H. J. Ryu, "Reaction Mechanism of Coal Chemical Looping Process for syngas Production with $CaSO_4$ Oxygen Carrier in the $CO_2$ Atmosphere", Industrial and Engineering Chemistry Research, Vol. 51, No. 31, 2012, pp. 10364-10373, doi: https://doi.org/10.1021/ie3009499.
  4. H. J. Ryu, C. W. Lee, D. H. Lee, D. H. Bae, S. Y. Lee, and Y. S. Park, "Direct Combustion Characteristics of Coal by Oxygen Carrier", Trans. of the Korean Hydrogen and New Energy Society, Vol. 25, No. 1, 2014, pp. 87-96, doi: https://doi.org/10.7316/KHNES.2014.25.1.087.
  5. Y. Liu, W. Jia, Q. Guo, and H. J. Ryu, "Effect of Gasifying Medium on the Coal Chemical Looping Gasification with $CaSO_4$ as Oxygen Carrier", Chinese Journal of Chemical Engineering, Vol. 22, No. 11-12, 2014, pp. 1208-1214, doi: https://doi.org/10.1016/j.cjche.2014.09.011.
  6. Q. Guo, X. Hu, Y. Liu, W. Jia, M. Yang, W. Man, H. Tian, and H. J. Ryu, "Coal Chemical Looping Gasification of Ca based Oxygen Carriers Decorated by CaO", Powder Technology, Vol. 275, 2015, pp. 60-68, doi: https://doi.org/10.1016/j.powtec.2015.01.061.
  7. J. Adanez, A. Abad, F. Garcia-Labiano, P. Gayan, and L. F. de Diego, "Progress in Chemical Looping Combustion and Reforming Technology", Progress in Energy and Combustion Science, Vol. 38, No. 2, 2012, pp. 215-282, doi: https://doi.org/10.1016/j.pecs.2011.09.001.
  8. H. Kim, D. Lee, D. H. Bae, D. Shun, J. I. Baek, and H. J. Ryu, "Comparison of Reduction Reactivity of New Oxygen Carriers for Chemical Looping Combustion System in a Bubbling Fluidized Bed", Trans. of the Korean Hydrogen and New Energy Society, Vol. 28, No. 5, 2017, pp. 554-560, doi: https://doi.org/10.7316/KHNES.2017.28.5.554.
  9. H. J. Ryu, J. Kim, B. W. Hwang, H. Nam, D. Lee, S. H. Jo, and J. I. Baek, "Hydrodynamics and Solid Circulation Characteristics of Oxygen Carrier for 0.5 MWth Chemical Looping Combustion System", Trans. of the Korean Hydrogen and New Energy Society, Vol. 29, No. 6, 2018, pp. 635-641, doi: https://doi.org/10.7316/KHNES.2018.29.6.635.
  10. H. J. Ryu, D. Lee, H. Nam, S. H. Jo, S. Y. Lee, and J. I. Baek, "Effect of Operating Variables on Solid Holdhup in an Air Reactor of 0.5 MWth Chemical Looping Combustion System", Journal of Energy & Climate Change, Vol. 13, No. 2, 2018, pp. 145-153. Retrieved from http://www.riss.kr/search/detail/DetailView.do?p_mat_type=1a0202e37d52c72d&control_no=3ab19a26fac08b086aae8a972f9116fb.
  11. J. H. Kim, J. Y. Yoon, D. Lee, J. I. Baek, and H. J. Ryu, "Performance Evaluation of New Oxygen Carriers for Chemical Looping Combustion", Journal of Energy and Climate Change, Vol. 12, No. 2, 2017. pp. 107-115. Retrieved from http://www.riss.kr/search/detail/DetailView.do?p_mat_type=1a0202e37d52c72d&control_no=046bb15c66c1c717e9810257f7042666.
  12. H. Kim, J. H. Kim, J. Y. Toon, D. Lee, J. I. Baek, and H. J. Ryu, "Selection of the Best Oxygen Carrier for Chemical Looping Combustion in a Bubbling Fluidized Bed Reactor", Clean Technology, Vol. 24, No. 1, 2018. pp. 63-69, doi: https://doi.org/10.7464/ksct.2018.24.1.063.
  13. H. J. Ryu, K. S. Kim, S. Y. Lee, Y. S. Park, and M. H. Park, "Reduction Characteristics of Mass Produced Particle for Chemical Looping Combustor with Different Fuels", Trans. of the Korean Society of Hydrogen Energy, Vol. 19, No. 4, 2008, pp. 348-358. Retrieved from http://210.101.116.61/10501110/index.asp.