Fundamental Study on Production of "Hyper Wood Pellet " (3) Upgraded Pellet Making by Torrefaction of Japanese Wood Pellets

T. Nomura, H. Gensai, H. Watada, T. Sano, D. Kamikawa, K. Kuroda, Y. Kubojima, H. Furusawa, S. Miura, S. Kaneko, S. Ohara & T. Yoshida
Upgraded wood pellets (Hyper wood pellets) were produced and evaluated by torrefaction of wood pellets. In this study, conventional wood pellets were initially prepared and subsequently torrefied on a laboratory and then larger scale. During the laboratory scale production, a few kilograms of pellets from wooden parts of Japanese cedar (Cryptomeria japonica) and Japanese oak (Konara, Quercus serrata) trees were heat treated in an inert gas oven. For the Japanese cedar, the calorific values were...