Torrefaction behavior of hot-pressed pellets prepared from leucaena wood
Nattawut Setkit1, Xian Li2, Hong Yao2
1The Joint Graduate School of Energy and Environment, Center of Excellence on Energy Technology and Environment, King Mongkut's University of Technology Thonburi, Bangmod, Tungkru, Bangkok 10140, Thailand.
Abstract:
In this study, torrefaction behavior of hot-pressed wood pellet prepared at 250 °C and compression pressure of 70 MPa was examined at temperature 260-300 °C. It was found that the torrefaction behavior of hot-pressed pellet (HP) was significantly different from that of Raw and cold-pressed pellet (CP). The mass yield and energy yield for torrefaction at 300 °C and 30 min holding time for HP were 54.5% and 84.4%, respectively. Whereas the mass yield and energy yield for torrefaction at 300 °C and 30 min for Raw were 41.5% and 58.1%, respectively. From the gas formation analysis, it was found that the dehydration and deoxygenation reactions were accelerated to produce a large amount of H2O and CO2 during the torrefaction of HP. It was judged that torrefaction of hot-pressed pellet was very effective to prepare high quality black pellet.
