TY - JOUR
T1 - Effect of heating rate of torrefaction of sugarcane bagasse on its physical characteristics
AU - Supramono, Dijan
AU - Devina, Yosephine Merry
AU - Tristantini, Dewi
N1 - Publisher Copyright:
© IJTech 2015.
PY - 2015
Y1 - 2015
N2 - Torrefaction, which is used to improve the properties of sugarcane bagasse as fuel in pulverised fuel combustion and as carbon feed in gasification, is a low heating rate pyrolysis of biomass carried out at a temperature of 200-300°C, at an atmospheric pressure, and in an inert environment. In the present work, sugarcane bagasse was torrefied at heating rates of 3, 6, and 10°C/minute, respectively, to achieve a final temperature of 275°C and after the final temperature was reached, hold times of 0 and 15 minutes, respectively occurred at a constant temperature of 275°C for a heating rate of 6°C/minute. The physical characteristics of torrefied sugarcane bagasse samples to be determined were a particle size distribution accomplished by grinding, hydrophobicity by allowing the samples to absorb moisture from the ambient air, and pellet hardness of the sample pellets. The torrefaction results show that increasing heating rate and hold time reduced the cellulose content of the sugarcane bagasse to as low as between 5.35% to 10.61% by weight composition, respectively. As the lignin content increased, the sample pellets resulted in better hardness in comparison to that measured on raw sugarcane bagasse. As the hemicellulose content increased, the samples, after grinding and stronger hydrophobicity, produced a higher fraction of smaller particle sizes. The maximum weight fraction of particles in these samples with sizes smaller than 105 μm achieved was 83.43% weight in contrast to 0.62% weight in raw sugarcane bagasse. The maximum water absorption by the samples in 3 hours was 1.28% weight in contrast to 8.02% weight by raw sugarcane bagasse. The results indicate that torrefaction is able to improve sugarcane bagasse physical characteristics, which are favourable for biomass pelletization, storage and transportation.
AB - Torrefaction, which is used to improve the properties of sugarcane bagasse as fuel in pulverised fuel combustion and as carbon feed in gasification, is a low heating rate pyrolysis of biomass carried out at a temperature of 200-300°C, at an atmospheric pressure, and in an inert environment. In the present work, sugarcane bagasse was torrefied at heating rates of 3, 6, and 10°C/minute, respectively, to achieve a final temperature of 275°C and after the final temperature was reached, hold times of 0 and 15 minutes, respectively occurred at a constant temperature of 275°C for a heating rate of 6°C/minute. The physical characteristics of torrefied sugarcane bagasse samples to be determined were a particle size distribution accomplished by grinding, hydrophobicity by allowing the samples to absorb moisture from the ambient air, and pellet hardness of the sample pellets. The torrefaction results show that increasing heating rate and hold time reduced the cellulose content of the sugarcane bagasse to as low as between 5.35% to 10.61% by weight composition, respectively. As the lignin content increased, the sample pellets resulted in better hardness in comparison to that measured on raw sugarcane bagasse. As the hemicellulose content increased, the samples, after grinding and stronger hydrophobicity, produced a higher fraction of smaller particle sizes. The maximum weight fraction of particles in these samples with sizes smaller than 105 μm achieved was 83.43% weight in contrast to 0.62% weight in raw sugarcane bagasse. The maximum water absorption by the samples in 3 hours was 1.28% weight in contrast to 8.02% weight by raw sugarcane bagasse. The results indicate that torrefaction is able to improve sugarcane bagasse physical characteristics, which are favourable for biomass pelletization, storage and transportation.
KW - Hardness
KW - Heating rate
KW - Hydrophobicity
KW - Sugarcane bagasse
KW - Torrefaction
UR - http://www.scopus.com/inward/record.url?scp=84954142969&partnerID=8YFLogxK
U2 - 10.14716/ijtech.v6i7.1771
DO - 10.14716/ijtech.v6i7.1771
M3 - Article
AN - SCOPUS:84954142969
VL - 6
SP - 1084
EP - 1093
JO - International Journal of Technology
JF - International Journal of Technology
SN - 2086-9614
IS - 7
ER -