抄録
Biomass is one of the sustainable energy sources and is the most suitable natural energy for storage and transport. Woody pellet is a typical biomass fuel and is accessible in most places around the world. Its transportation efficiency, however, is not so high, due to lack of energy density. In order to improve the efficiency of woody biomass energy transportation, the ‘semi-carbonization pelletizing’ method was adopted. Semi-carbonized pellet,‘ Biomass Carbonized Densified Fuel’ (BCDF), is not a fully carbonized woody biomass, but is an intermediate of desiccated woody biomass and charcoal. Although charcoal is a high energy density fuel in J/kg and is widely being used, about a half of the original energy is lost during the carbonization process. Semi-carbonization is a balanced method for energy density improvement and energy yield. The process parameters of semi-carbonization, however, are so many and are not examined yet. In the present study, the effect of water content in woody biomass on the energy density and energy yield of semi-carbonized pellet was examined. Results show that water content diminish the process temperature range for improvement of energy transport efficiency compared to an absolute dry condition.
