TORREFACTION OF JAPANESE CEDAR (CRYPTOMERIA JAPONICA) LEAF AND XYLEM

摘要

Utilization of forest residue is required in Japan. Torrefaction, which is the conversion technology tornmake upgraded solid fuel from woody biomass, is recognized as an option to promote unutilized forest biomass. Pilotrnplant for torrefaction pellet has been built Dec. 2015 at Kanagawa prefecture in Japan. The most candidate feedstockrnis thinned wood and branch of Japanese cedar. Especially the branch is composed xylem and leaves. Difference ofrnmass yield behavior or elemental composition change during torrefaction with xylem and leaves is expected. Thernpurpose of this study was to accumulate basic data such as reaction temperatue for quality control of torrefactionrnproduct. The thermal treatment of xylem and leaves was conducted using lab scale experiment. The difference ofrnreaction behavior with the xylem and reaves during torefaction was investigated. However reaction temperature atrn290 ℃ was the mass yield and elemental composition of product was similar. Therefore the mixture of xylem andrnleaves such as branch can be applied simultaneous treatment for torrefaction.