O-04 スギの低温改質時副生タールからの効率的ジテルペン類回収

抄録

Co-firing carbonized woody biomass in coal-firing power generation plant is effective to reduce greenhouse gas emissions because its high energy density and good pulverization property enable high mixing rate of 30calorie-% or more. Tar, by-produced during the carbonization process at 300-400°C, contained high valuable diterpenes of about 5-20%, as previously reported. However, it is difficult to extract diterpenes by means of an HPLC (high performance liquid chromatograph) because the tar is a black and gluey semisolid, which is a mixture of diterpenes, decomposed materials from lignocellulose and small particles. Thermal treatment and hot-water rinsing were effective to separate diterpenes. For example, ferruginol was condensed from 12% to 22% after thermal treatment at 120°C during 24hours and to 33% after hot-water rinsing.