O-05 スギの低温改質/炭化時に副生するタールからの高付加価値物質回収の試み

抄録

A kind of woody biomass pyrolyzed at relatively low temperature of 300-400 °C, named "bio-upgraded coal," has better energy density and pulverization property to achieve a high co-firing rate of 30% and more in a coal combusting power plant. Tars by-produced during the upgrading processes from Japanese cedar were analyzed, and it was found the tars contained many compounds, which depended on upgrading conditions and tar sampling points. Tar sampled from an outlet of upgrading furnace contained valuable diterpenes having pharmaceutical effects of high contents (ex. ferruginol: 12%). The tar containing these valuable diterpenes may improve cost effectiveness of the total system.