P-3-4 エリアンサスの含有金属によるCO₂ ガス化反応への影響

抄録

In recent years, biomass fuel demand for domestic power / heat production is increasing. For a stable woody bioresource supply, herbaceous perennial energy-crop such as Erianthus arundinaceus (Erianthus) is a promising option. Erianthus (JES1) grew about 14 t/ha in Nasu-shiobara, Japan; it standing-dead, leading to small drying cost. The continuous gasification experiments so far have revealed that the upper limit at which the cold-gas-efficiency does not decrease is about 10 wt%. Further, the LHV of Erianthus (18.4 MJ/kg) was 12% smaller than the timber wastes (20.8 MJ/kg). However, the cold-gas-efficiency for 10 wt% Erianthus blends continued to be the same level as timber wastes. In this study, the effect of metal components contained in Erianthus char on the CO₂ gasification rate was investigated using TGDTA. The gasification rate constants for the raw chars are 10 times, 6 times, and triple as much as that was demineralized at T = 800, 900, and 1,000 °C, respectively, which resulted from the presence of metal components.