한국연소학회지 (Journal of the Korean Society of Combustion)

  • 제21권4호
  • /
  • Pages.23-29
  • /
  • 2016
  • /
  • 1226-0959(pISSN)
  • /
  • 2466-2089(eISSN)
한국연소학회 (The Korean Society of Combustion)
권호 표지
DOI QR코드

DOI QR Code

고온/고압 조건에서의 석탄 촤 내부 및 외부 가스화 반응효과

Impact of Internal/External Diffusion on Gasification Reaction Rate Analysis of Coal Char in High Temperatures and Elevated pressures

  • 투고 : 2016.01.07
  • 심사 : 2016.10.12
  • 발행 : 2016.12.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Reactivity of gasification defined by bouardard reaction is critical parameter in efficiency of the gasifier. In this study, char reactivity of the gasification was derived from the experiments using the intrinsic reaction kinetics model. Pressurized wire mesh heating reactor (PWMR) can produce high temperature and high pressure conditions up to 50 atm and 1750 K, respectively and PWMR was designed to evaluate the intrinsic reaction kinetics of $CO_2$ gasification. In this study, Kideco and KCH (sub-bituminous Indonesian coal) were pulverized and converted into char. Experiments used the PWMR were conducted and the conditions of the temperature and pressure were 1373~1673 K, 1~40 atm. To distinguish the pressure effect from high pressurized condition, internal and external effectiveness factors were considered. Finally, the intrinsic kinetics of the Kideco and KCH coal char were derived from $n^{th}$ order reaction rate equations.

키워드

참고문헌

  1. M.W. Kang, D.K. Seo, Y.T. Kim and J.H. Hwang, Gasification reactivity of Chinese Shinwha Coal Chars with Steam, J. Korean Soc. Combust., 15 (1) (2010) 22-29.
  2. E.C. Jeon, J.W. Sa and S.H. Lee, Development of Emission Factors for Greenhouse Gas($CO_2$) from Bituminous coal Fired Power Plants, J. Korean Soc. Atmos. Environ., 22 (1) (2006) 108-116.
  3. G.W. Lee and Y.S. Shin, 2012, Technical Review of Coal Gasifiers for Production of Synthetic Natural Gas, Trans. Korean Soc. Mech. Eng. B, 36 (8) (2012) 865-871. https://doi.org/10.3795/KSME-B.2012.36.8.865
  4. Y.L. Kevin, R.G. Kim, C.W. Hwang and C.H. Jeon, 2014, Reaction Rate Analysis of $CO_2$ Gasification for Indonesian Coal Char at High Temperature and Elevated Pressure, Trans. Korean Soc. Mech. Eng. B, 38 (9) (2014) 781-787. https://doi.org/10.3795/KSME-B.2014.38.9.781
  5. L. Zhou, G. Zhang, M. Schurz, K. Steffen and B. Meyer, Kinetic study on $CO_2$ gasification of brown coal and biomass chars : reaction order, Fuel, 173 (2016) 311-319. https://doi.org/10.1016/j.fuel.2016.01.042
  6. G. Aranda, A.J. Grootjes, C.M. van der Meijden, A. van der Drift, D.F. Gupta, R.R. Sonde, S. Poojari and C.B. Mitra, Conversion of high-ash coal under steam and $CO_2$ gasification conditions, Fuel Process. Technol., 141 (2016) 16-30. https://doi.org/10.1016/j.fuproc.2015.06.006
  7. P. Dai, J.S. Dennis and S.A. Scott, Using an experimentally-determined model of the evolution of pore structure for the gasification of chars by $CO_2$, Fuel, 171 (2016) 29-43. https://doi.org/10.1016/j.fuel.2015.12.041
  8. S. Niksa, G. Liu and R.H. Hurt, Coal conversion submodels for design applications at elevated pressures. Part 1. devolatilization and char oxidation, Prog. Energ. Combust., 29 (5) (2003) 425-477. https://doi.org/10.1016/S0360-1285(03)00033-9
  9. J.H. Song, C.H. Jeon, and A.L. Boehman, Impacts of oxygen diffusion on the combustion rate of inbed soot particles, Energ. Fuel., 24 (4) (2004) 2418-2428. https://doi.org/10.1021/ef900692m
  10. G. Liu, A.G. Tate, G.W. Bryant and T. Wall, Mathematical modeling of coal char reactivity with $CO_2$ at high pressures and temperatures, Fuel, 79 (6) (2000) 627-633. https://doi.org/10.1016/S0016-2361(99)00186-6
  11. N.M. Laurendeau, Heterogeneous kinetics of coal char gasification and combustion, Prog. Energ. Combust., 4 (4) (1978) 211-270.
  12. R.G. Kim, C.W. Hwang and C.H. Jeon Kinetics of coal char gasification with $CO_2$: Impact of internal/external diffusion at high temperature and elevated pressure, Appl. Energ., 129 (2014) 299-307. https://doi.org/10.1016/j.apenergy.2014.05.011
  13. R.F.D. Monaghan and A.F. Ghoniem, A dynamic reduced order model for simulating entrained flow gasifiers. Part II: Model validation and sensitivity analysis, Fuel, 94 (2012) 280-297. https://doi.org/10.1016/j.fuel.2011.08.046
  14. S. Kajitani, N. Suzuki, M. Ashizawa and S. Hara, $CO_2$ gasification rate analysis of coal char in entrained flow coal gasifier, Fuel, 85 (2) (2006) 163-169. https://doi.org/10.1016/j.fuel.2005.07.024
  15. S. Kajitani, N. Suzuki, M. Ashizawa and S. Hara, Gasification rate analysis of coal char with a pressurized drop tube furnace, Fuel, 81 (2002) 539-546. https://doi.org/10.1016/S0016-2361(01)00149-1

피인용 문헌

  1. 가압 DTF를 이용한 석탄 촤-CO2 가스화 반응상수 도출 vol.22, pp.4, 2016, https://doi.org/10.15231/jksc.2017.22.4.019