RT Journal Article
T1 Predicting the energy properties of torrefied debarked pine pellets from torrefaction temperature and residence time
A1 Iglesias Canabal, Andrés
A1 Proupín Castiñeiras, Jorge
A1 Rodríguez Añón, José Antonio
A1 Eimil Fraga, Cristina
A1 Rodríguez Soalleiro, Roque
K1 Modelling pellet properties
K1 Bioenergy
K1 Torrefaction
K1 Pelletization
K1 Energy properties
K1 Solid biofuel heating values
AB In this study, high quality radiata pine pellets were torrefied at a range of temperatures (T = 210, 240, 270 and 300 °C) and residence times (t = 20, 40 and 60 min). The effects of these treatments on mass yield (MY), ash content (A), volatile matter (VM) and fixed carbon (FC), high heating value on a dry basis (HHVdb) and low heating value on a wet basis (LHVwb) were investigated, and models were constructed to predict these energy properties from T and t. Untreated pellets were analysed as control samples. Threshold conditions of 240 °C 40 min yielded significant increases in HHVdb and carbon content and a significant decrease in oxygen content. This combination significantly increased A and FC and significantly decreased VM. Logistics models using T, t, t × T and T2 were able to predict A accurately, with no bias, whereas FC values tended to be underestimated. The variation in HHVdb and LHVwb was explained by linear models with t and t × T as variables. Use of the models enabled definition of torrefaction severity that ensures an A below 0.7% and a LHVwb value 30% higher than obtained with raw pine pellets. Torrefaction conditions of T = 260–270 °C and t = 50–60 min are proposed
PB Elsevier
SN 0960-1481
YR 2023
FD 2023
LK http://hdl.handle.net/10347/33193
UL http://hdl.handle.net/10347/33193
LA eng
NO Renewable Energy, Volume 218, 2023, 119346
DS Minerva
RD 24 abr 2026