Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Pressure on Minimum Fluidization Velocity and Transition Velocity to Fast Fluidization of Oxygen Carrier for Chemical Looping Combustor

케미컬루핑 연소를 위한 산소전달입자의 최소유동화속도 및 고속유동층 전이유속에 미치는 압력의 영향

  • Received : 2017.01.05
  • Accepted : 2017.02.28
  • Published : 2017.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

To develop a pressurized chemical looping combustor, effect of pressure on minimum fluidization velocity and transition velocity to fast fluidization was investigated in a two-interconnected pressurized fluidized bed system using oxygen carrier particle. The minimum fluidization velocity was measured by bed pressure drop measurement with variation of gas velocity. The measured minimum fluidization velocity decreased as the pressure increased. The transition velocity to fast fluidization was measured by emptying time method and decreased as the pressure increased. Gas velocity in the fuel reactor should be greater than the minimum fluidization velocity and gas velocity in the air reactor should be greater than the transition velocity to fast fluidization to ensure proper operation of two interconnected fluidized bed system.

Keywords

References

  1. J. I. Baek, H. Jo, T. Eom, J. Lee and H. J. Ryu, "The Effect of CBB(CaO.BaO.B2O3) Addition on the Physical Properties and Oxygen Transfer Reactivity of NiO-based Oxygen Carriers for Chemical Looping Combustion", Trans. of Korean Hydrogen and New Energy Society, Vol. 27, No. 1, 2016, pp. 95-105. https://doi.org/10.7316/KHNES.2016.27.1.095
  2. H. J. Ryu, H. Kim, D. H. Lee, G. T. Jin and J. I. Baek, "Reduction and Decomposition Charactersitics of CaSO4 Based Oxygen Carrier Particles", Trans. of Korean Hydrogen and New Energy Society, Vol. 26, No. 6, 2015, pp. 600-608. https://doi.org/10.7316/KHNES.2015.26.6.600
  3. M. Akai, T. Kagajo, and M. Inoue, "Performance Evaluation of Fossil Power Plant with CO2 Recovery and Sequestering System", Energy Convers. Mgmt, Vol. 36, 1995, pp. 801-804. https://doi.org/10.1016/0196-8904(95)00125-W
  4. H. J. Ryu, N. Y. Lim, D. H. Bae, G. T. Jin, "Minimum Fluidization Velocity and Transition Velocity to Fast Fluidization of Oxygen Carrier Particle for Chemical Looping Combustor", HWAHAK KONGHAK, Vol. 41, No. 5, 2003, pp. 624-631.
  5. S. Shrestha, B. S. Ali and M. D. B. Hamid, "Cold Flow Model of Dual Fluidized Bed: A Review", Renewable and Sustainable Energy Reviews, Vol. 53. 2016, pp. 1529-1548. https://doi.org/10.1016/j.rser.2015.09.034
  6. 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, 2012, pp. 215-282.
  7. D. H. Bae, H. J. Ryu, D. Shun, G. T. Jin and D. K. Lee, "Effect of Temperature on Transition Velocity from Turbulent Fluidization to Fast Fluidization in a Gas Fluidized Bed", HWAHAK KONGHAK, Vol. 39, No. 4, 2001, pp. 456-464.
  8. M. Y. Seo, J. H. Goo, S. D. Kim, J. G. Lee, Y. T. Guahk, N. S. Rho, G. H. Koo, D. Y. Lee, W. C. Cho and B. H. Song, "The Transition Velocities in a Dual Circulating Fluidized Bed Reactor with Variation of Temperatures", Powder Technology, Vol. 264, 2014, pp. 583-591. https://doi.org/10.1016/j.powtec.2014.05.059
  9. H. Kim, D. H. Lee,, J. I. Baek and H. J. Ryu, "Selection of Oxygen Carrier Candidates for Chemical Looping Combustion by Measurement of Oxygen Transfer Capacity and Attrition Loss", Trans. of the Korean Society of Hydrogen Energy, Vol. 27, No. 4, 2016, pp. 404-411. https://doi.org/10.7316/KHNES.2016.27.4.404
  10. H. J. Ryu, Y. C. Park, S. Y. Lee, S. H. Jo, D. Shun and J. I. Baek, "CH4 Combustion Characteristics of Oxygen Carriers in a Bubbling Fluidized Bed", Trans. of the Korean Society of Hydrogen Energy, Vol. 27, No. 5, 2016, accepted.
  11. J. Y. Yoon, D. H. Bae, J. I. Baek and H. J. Ryu, "Reduction Characteristics of Oxygen Carriers in a Pressurized Bubbling Fluidized Bed". Trans. of the Korean Society of Hydrogen Energy, Vol. 27, No. 5, 2016, accepted.
  12. 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", Krean Chem. Eng. Res., Vol. 50, No. 5, 2012, pp. 843-849. https://doi.org/10.9713/kcer.2012.50.5.843
  13. 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 Korean Hydrogen and New Energy Society, Vol. 23, No. 1, 2012, pp. 83-92. https://doi.org/10.7316/khnes.2012.23.1.083
  14. F. A. Zenz and N. A. Weil, "A Theoretical-Empirical Approach to the Mechanism of Paritcle Entrainment from Fluidized Beds", AiChE Journal, Vol. 4, 1958, pp. 472-479. https://doi.org/10.1002/aic.690040417
  15. I. H. Chan and T. M. Knowlton, "The Effect of Pressure on Entrainment from Bubbling Gas-Fluidized Beds", in "Fluidization", Proc. 4th Int. Conf. on Fluidization, edited by D. Kunii and R. Toei, Engineering Foundation, 1984, pp. 283-290.