Korean Journal of Chemical Engineering

, Volume 23, Issue 4, pp 576–580 | Cite as

Gasification characteristics of combustible wastes in a 5 ton/day fixed bed gasifier

  • See Hoon Lee
  • Kyong Bin Choi
  • Jae Goo Lee
  • Jae Ho Kim
Article

Abstract

The gasification characteristics of combustible wastes were determined in a 5 ton/day fixed bed gasifier (1.2 m I.D. and 2.8m high). The fixed bed gasifier consisted of air compressor, oxygen tank, MFC, fixed bed gasifier, cyclone, heat exchanger, solid/gas separator, water fluidized bed reactor and blower. To capture soot or unburned carbon from the gasification reaction, solid/gas separator and water fluidized bed were used. The experiments with 10–50 hours of operation were carried out to determine the effects of bed temperature, solid/oxygen ratio and oxidant on the gas composition, calorific value and carbon conversion. The calorific values of the produced gas decreased with an increase of bed temperature because combustion reaction happened more actively. The gas composition of partial oxidation of woodchip is CO: 34.4%, H2: 10.7%, CH4: 6.0%, CO2: 48.9% and that of RPF is CO: 33.9%, H2: 26.1%, CH4: 10.7%, CO2: 29.2%. The average calorific values of produced gas were about 1,933 kcal/Nm3, 2,863 kcal/Nm3, respectively. The maximum calorific values were 3,100 kcal/Nm3 at RPF/oxygen ratio: 7

Key words

Combustible Waste Gasification Fixed Bed Syngas 

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References

  1. Bridgwater, A.V., “The technical and economic feasibility of biomass gasification for power generation,”Fuel,74, 631 (1995).CrossRefGoogle Scholar
  2. Dornburg, V. and Faaij, A. P. C., “Efficiency and economy of woodfired biomass energy systems in relation to scale regarding heat and power generation using combustion and gasification technologies,”Biomass and Bioenergy,21, 91 (2001).CrossRefGoogle Scholar
  3. Heermann, C.,Pyrolysis & Gasification of waste: A worldwide technology & business review, 1st ed., Juniper Consultancy Services Ltd., UK (2000).Google Scholar
  4. Kim, J. H. and Im, H.G., “Study of waste gasification characteristics with adiabatic equilibrium model,”Abstracts of Papers of ACS,228, I&EC 21 (2004).Google Scholar
  5. Kim, J. H.,Process development of manufacturing synthetic gas and recycling raw material from combustible wastes by gasification, Industrial Waste Recycling R&D program, Ministry of Science and Technology, Korea (2003).Google Scholar
  6. Ko, M. K., Lee, W.Y., Kim, S. B., Lee, K.W. and Chun, H. S., “Gasification of food waste with steam in fluidized bed,”Korean J. Chem. Eng.,18, 961 (2001).CrossRefGoogle Scholar
  7. Kurkela, E., Stahlberg, P., Laatikainen, J. and Simell, P., “Development of simplified IGCC-processes for biofuels: Supporting gasification research at VTT,”Bioresource Technology,46, 37 (1993).CrossRefGoogle Scholar
  8. Lee, W. J., Kim, S. D. and Song, B. H., “Steam gasification of coal with salt mixture of potassium and nickel in a fluidized bed reactor,”Korean J. Chem. Eng.,18, 640 (2001).CrossRefGoogle Scholar
  9. Lee, S. H., Choi, Y. C., Lee, J.G. and Kim, J. H., “The effects of heating rate on pyrolysis of agricultural wastes,”J. Korea Society of Waste management,21, 465 (2004).Google Scholar
  10. Min, T. J., Yoshikawa, K. and Murakami, K., “Distributed gasification and power generation from solid wastes,”Energy,30, 2219 (2005).CrossRefGoogle Scholar
  11. Na, J. I., Park, S. J., Kim, Y.G., Lee, J.G. and Kim, J.H., “Characteristics of oxygen-blown gasification for combustible waste in a fixedbed gasifier,”Applied Energy,75, 275 (2003).CrossRefGoogle Scholar
  12. Song, B. H., Jang, Y.W., Kim, S. D. and Kang, S. K., “Gas yields from coal devolatilization in a bench-scale fluidized bed reactor,”Korean J. Chem. Eng.,18, 770 (2001).CrossRefGoogle Scholar
  13. SVZ, SVZ Newsletter, special edition, Germany (2000).Google Scholar
  14. Yun, Y. S. and Ju, J. S., “Operation performance of a pilot-scale gasification/ melting process for liquid and slurry-type wastes,”Korean J. Chem. Eng.,20, 1037 (2003).CrossRefGoogle Scholar

Copyright information

© Korean Institute of Chemical Engineering 2006

Authors and Affiliations

  • See Hoon Lee
    • 1
  • Kyong Bin Choi
    • 1
    • 2
  • Jae Goo Lee
    • 1
  • Jae Ho Kim
    • 1
  1. 1.Thermal Process Research CenterKorea Institute of Energy ResearchDaejeonKorea
  2. 2.Combustion System Research CenterKorea Institute of Energy ResearchDaejeonKorea

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