TY - JOUR
T1 - Characterization and behavior of water in lignocellulosic and microalgal biomass for thermochemical conversion
AU - Bikbulatova, Svetlana
AU - Tahmasebi, Arash
AU - Zhang, Zhiqiang
AU - Yu, Jianglong
N1 - Funding Information:
This study was supported by the National Natural Science Foundation of China (21476100). The authors also acknowledge the financial support of other grants funded by National Natural Science Foundation of China (21676132, U1361120, and 21176109). The PhD scholarship from the Liaoning Provincial Government of China is greatly acknowledged.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - Behavior and nature of water in biomass significantly influence the thermochemical conversion processes. This study investigates the characteristics and behavior of water in lignocellulosic and microalgal biomass using differential scanning calorimetry (DSC) and low-temperature X-ray diffraction (XRD) methods. Pine sawdust (PS), peanut shell (PT), and microalgae (MA) samples with different water contents were used and analyzed systematically. Freezable free water was detected in all biomass samples through DSC analysis. Different from PS and PT, a shift in the position of freezable free water peaks was observed during freezing process of MA on DSC, which was attributed to the strong hydrophilicity of this biomass. No freezable bound water was observed in the biomass samples. However, significant amount of non-freezable bound water was detected in all biomass samples. The freezing enthalpies of freezable free water in PS, PT, and MA ranged between 319.04 and 297.7 kJ/kg which were in good agreement with that of bulk water. The boundary between freezable and non-freezable water in the biomass samples was clearly defined combining DSC and XRD analyses. The amount of non-freezable bound water in biomass samples directly correlated with the relative concentration of oxygen functional groups in biomass samples.
AB - Behavior and nature of water in biomass significantly influence the thermochemical conversion processes. This study investigates the characteristics and behavior of water in lignocellulosic and microalgal biomass using differential scanning calorimetry (DSC) and low-temperature X-ray diffraction (XRD) methods. Pine sawdust (PS), peanut shell (PT), and microalgae (MA) samples with different water contents were used and analyzed systematically. Freezable free water was detected in all biomass samples through DSC analysis. Different from PS and PT, a shift in the position of freezable free water peaks was observed during freezing process of MA on DSC, which was attributed to the strong hydrophilicity of this biomass. No freezable bound water was observed in the biomass samples. However, significant amount of non-freezable bound water was detected in all biomass samples. The freezing enthalpies of freezable free water in PS, PT, and MA ranged between 319.04 and 297.7 kJ/kg which were in good agreement with that of bulk water. The boundary between freezable and non-freezable water in the biomass samples was clearly defined combining DSC and XRD analyses. The amount of non-freezable bound water in biomass samples directly correlated with the relative concentration of oxygen functional groups in biomass samples.
KW - Biomass-water interaction
KW - Freezable free water
KW - Low-temperature DSC
KW - Low-temperature XRD
KW - Non-freezable bound water
UR - http://www.scopus.com/inward/record.url?scp=85014025793&partnerID=8YFLogxK
U2 - 10.1016/j.fuproc.2017.02.025
DO - 10.1016/j.fuproc.2017.02.025
M3 - Article
AN - SCOPUS:85014025793
SN - 0378-3820
VL - 160
SP - 121
EP - 129
JO - Fuel Processing Technology
JF - Fuel Processing Technology
ER -