Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Estimation of Proper Compression Ratios for Korean Domestic Wood Species by Single Pellet Press

  • Received : 2020.03.23
  • Accepted : 2020.05.08
  • Published : 2020.07.25
Download PDF
⟨ Previous Next ⟩

Abstract

Single pellet press technology allows for fast, low-cost, and small-scale tests to investigate pelletizing characteristics. We estimated proper compression ratios for five Korean domestic wood species through predicted relationships between pelletizing pressure Px and compression ratio based on experimental data obtained from a single pellet press unit. The pressures required to obtain a 6-mm-diam pellet of density 1200 kg/㎥ were estimated as 111 MPa for Populus davidiana, 133 MPa for Robinia pseudoacacia, 136 MPa for Quercus mongolica, 97 MPa for Pinus densiflora, and 127 MPa for Pinus rigida. On the basis of these pressures, we estimated proper compression ratios to be within the range 7.676-8.410 for these species, and we found the compression ratios needed for hardwood species to be somewhat higher than those needed for softwood species to obtain the pellet density of 1200 kg/㎥.

Keywords

References

  1. Ahn, B.J., Kim, Y.S., Lee, O.K., Cho, S.T., Choi, D.H., Lee, S.M. 2013a. Wood pellet production using domestic forest thinning residues and their quality characteristics. Journal of the Korean Wood Science and Technology 41(4): 346-357. https://doi.org/10.5658/WOOD.2013.41.4.346
  2. Ahn, B.J., Chang, H.S., Cho, S.T., Han, G.S., Yang, I. 2013b. Effect of the addition of binders on the fuel characteristics of wood pellets. Journal of the Korean Wood Science and Technology 41(6): 465-489.
  3. Carly, W., Shield, I. 2017. Factors affecting wood, energy grass and straw pellet durability. Renewable and Sustainable Energy Reviews Volume 71: 1-11. https://doi.org/10.1016/j.rser.2016.12.119
  4. Finell, M., Arshadi, M., Gref, R., Scherzer, T., Knolle, W., Lestander, T. 2009. Laboratory-scale production of biofuel pellets from electron beam treated Scots pine (Pinus silvestris L.) sawdust. Radiat. Phys. Chem. 78: 281-287. https://doi.org/10.1016/j.radphyschem.2008.12.002
  5. Gemco Energy Co., Ltd., NA. What's the compression ratio of wood pellet machine. www.gemcopelletmills.com.
  6. Holm, J.K., Henriksen, U.B., Hustad, J.E. 2006. Toward an understanding of controlling parameters in softwood and hardwood pellets production. Energy Fuels 20: 2686-2694. https://doi.org/10.1021/ef0503360
  7. Lee, S.M., Choi, D H., Cho, S.T., Nam, T.H., Han, G.S. Yang, I. 2011. Effects of various factors on the durability of pellets fabricated with Larix kaempferi C. and Liriodendron tulipifera L. sawdust. Journal of the Korean Wood Science and Technology 39(3): 258-268. https://doi.org/10.5658/WOOD.2011.39.3.258
  8. Nguyen, Q.N., Cloutier, A., Achim, A., Stevanovic, T. 2015. Effect of process parameters and raw material characteristics on physical and mechanical properties of wood pellets made from sugar maple particles. Biomass and Bioenergy 80: 338-349. https://doi.org/10.1016/j.biombioe.2015.06.010
  9. Nielsen, N.P. K., Gardner, D.J., Poulsen, T., Felby, C. 2009. Importance of temperature, moisture content, and species for the conversion process of wood into fuel pellets. Wood Fiber Sci. 41: 414-425.
  10. Puig-Arnavat, M., Shang, L., Sarossy, Z., Ahrenfeldt, J., Henriksen, U.B. 2016. From a single pellet press to a bench scale pellet mill - Pelletizing size different biomass feedstocks. Fuel Processing Technology 142: 27-33. https://doi.org/10.1016/j.fuproc.2015.09.022
  11. Seo, J.W., Lee, E.S., Kang, C.Y., Kim, S.B., Yoon, Y.H., Park, H. 2015. Comparison of quality characteristics of wood pellet manufactured from Pinus densiflora S. et Z. and Pinus rigida Mill. Journal of the Korean Wood Science and Technology 43(3): 374-380. https://doi.org/10.5658/WOOD.2015.43.3.374
  12. Sokhansanj, S., Turhollow, A.F. 2004. Biomass densification - Cubing operations and costs for corn stover. Applied Engineering Agriculture 20: 495-499.
  13. Stelte, W., Holm, J.K., Sanadi, A.R., Barsberg, S., Ahrenfeldt, J., Henriksen, U.B. 2011a. Fuel pellets from biomass: The importance of the pelletizing pressure and its dependency on the processing conditions. Fuel 90(11): 3285-3290. https://doi.org/10.1016/j.fuel.2011.05.011
  14. Stelte, W. 2011b. Fuel Pellets from Biomass. Processing, Bonding, Raw Materials. Roskilde: Technical University of Denmark. Riso-PhD, No. 90(EN).
  15. Whittaker, C., Shield, I. 2017. Factors affecting wood, energy grass and straw pellet durability - A review. Renewable & Sustainable Energy Reviews 71: 1-11. https://doi.org/10.1016/j.rser.2016.12.119
  16. Yang, I., Kim, S.H., Han, G.S. 2017. Effect of moisture content of sawdust and length to diameter ratio of a hole in flat-die pelletizer on the fuel characteristics of wood pellets produced with Quercus mongolica, Pinus densiflora, Pinus rigida and Larix kaempferi. Journal of the Korean Wood Science and Technology 45(4): 382-398. https://doi.org/10.5658/WOOD.2017.45.4.382