バイオマスの組成・含水率が熱流動特性に及ぼす影響

抄録

Biocoke (BIC) produced from biomass is a solid fuel which has high density and hardness. The solidification of BIC occurs by adhesive property of biomass. The adhesive mechanism seemed to be based on thermo-fluid phenomena under high temperature and pressure of hemicellulose and lignin which are main components of biomass. In this study, we investigated the thermo-fluid phenomena of the woody and herbaceous biomass. We focused on the correlation between moisture content of biomass and composition ratio of hemicellulose and lignin. Also, we intended to experimentally clarify the temperature which heat fluidity starts for each biomass. The experimental results show that the moisture content increases with decreasing starting temperature of heat fluidity for all biomass. Particularly, considering that rice straw and green tea belongs to herbaceous biomass, the heat fluidization occurs at low moisture content (5%). The actual value is highly correlated to the estimation value about heat fluidization temperature of biomass. However, the estimation value is underestimated by approximately 16°C for an actual value. The variation is approximately ±30%.