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

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

DOI QR Code

The Effect on the Steam Gasification Reaction of Low-Rank Coal Mixed with Waste Catalysts

저급 석탄과 혼합한 폐촉매의 수증기 가스화 반응에 미치는 영향

  • Kwak, Jaehoon (Department of Energy Storage & Conversion Engineering, Chonbuk National University) ;
  • Seo, Seokjin (Department of Energy Storage & Conversion Engineering, Chonbuk National University) ;
  • Lee, Sojung (Department of Energy Storage & Conversion Engineering, Chonbuk National University) ;
  • Song, Bungho (Department of Chemical Engineering, Kunsan National University) ;
  • Sohn, Jung Min (Department of Energy Storage & Conversion Engineering, Chonbuk National University)
  • 곽재훈 (전북대학교 에너지저장변환공학과) ;
  • 서석진 (전북대학교 에너지저장변환공학과) ;
  • 이소정 (전북대학교 에너지저장변환공학과) ;
  • 송병호 (군산대학교 화학공학과) ;
  • 손정민 (전북대학교 에너지저장변환공학과)
  • Received : 2012.11.28
  • Accepted : 2012.12.31
  • Published : 2012.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

We have investigated the kinetics and activity of waste catalysts for steam-lignite gasification. Waste catalysts I, II, III and reference $K_2CO_3$ were used and physical mixed with a coal. The gasification experiments were carried out with the low rank coal loaded with 1 wt% and 5 wt% catalyst at the temperature range from 700 to $900^{\circ}C$ using thermobalance reactor. It was observed that the carbon conversion reached almost 100% regardless of the kinds of catalysts at $900^{\circ}C$. The shortest time to reach the designated conversion was obtained for 1 wt% waste catalyst II and 5 wt% $K_2CO_3$ at $900^{\circ}C$. The gasification reaction rate constant increased with increasing the temperature. Highest rate constant was obtained with $K_2CO_3$ at $900^{\circ}C$. The lowest activation energy was 69.42 kJ/mol for 5 wt% waste catalyst II. The waste catalyst had an influence on the reduction of activation energy.

Keywords

References

  1. S. J. Gong, X. Zhu, Y. J. Kim, B. H. Song, W. Yang, W. S. Moon and Y. S. Byoun, "A kinetic study of steam gasification of low rank coal, wood chip and petroleum coke", Korean Chem Eng, Vol. 48, 2010, pp. 80-87.
  2. Alejandre M. and Fanor M. "Reactivity of coal gasification with steam and $CO_2$" Fuel, Vol. 77, 1998, pp. 1831-1839. https://doi.org/10.1016/S0016-2361(98)00123-9
  3. J. H. Chi, "Char Gasification Model Including the Effects of Pore Structure and Solid Reaction Product", Trans. of the Korean Hydrogen and New Energy Society, Vol. 21, 2010, pp. 328-339.
  4. Y. K. Choi, S. H. Moon, H. I. Lee, W. Y. Lee and H. K. Rhee, "Kinetics of Steam Gasification of Various Coal Chars Catalyzed by Alkali Metal" Journal of Korean Institute of Chemical Engineer, Vol. 30, 1992, pp. 415-422.
  5. Philip L., Walker Jr., Shiro M., Tamotsu H., Takatoshi M. and M.K. Ismail "Catalysis of gasification of coal-derived cokes and chars", Fuel, Vol. 62, 1983, pp. 140-149. https://doi.org/10.1016/0016-2361(83)90186-2
  6. Douglas W, Mckee, Clifford L. S., Philip G. Kosky and Edward J. L "catalysis of coal char gasification by alkali metal salts", Fuel, Vol. 62, 1983, pp. 217-200. https://doi.org/10.1016/0016-2361(83)90202-8
  7. Bernard R. C. and Leonidas P., "Chemistry and physics of coal utilization-1980, 1980, p. 236.
  8. J. Y. Lee and J. S. Kim, "Recycling of Spent Catalysts Petrochemical", Trends in metal & materials engineering, Vol. 15, 2002, pp. 17-24.
  9. S. T. Park, Y. T. Choi and J. M. Sohn "The study of CO2 Gasification of Low Rank Coal Impregnated by $K_2CO_3$, $Mn(NO_3)_2$, and $Ce(NO_3)_3$" Appl. Chem. Eng., Vol. 22, 2011, pp. 312-318
  10. D.P. Ye, J. B. Agnew and D. K. Zhang "Gasification of a South Australian low-rank coal with carbon dioxide and team : kinetics and reactivity studies", Feul, Vol. 77, 1998, pp. 1209-1219.
  11. S. Kasaoka, Y. Sakata, and C. Tong., "Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam", Int. Chem. Eng., Vol. 25(1), 1985, pp. 160-175.

Cited by

  1. Supercritical Water Gasification of Low Rank Coal with High Moisture Content vol.24, pp.4, 2013, https://doi.org/10.7316/KHNES.2013.24.4.340
  2. Study on the analysis of gaseous products from lignite steam gasification with waste catalysts vol.6, pp.4, 2014, https://doi.org/10.1063/1.4885841