TY - JOUR
T1 - Valorization of Furfural Residue by Hydrothermal Carbonization
T2 - Processing Optimization, Chemical and Structural Characterization
AU - Yue, Fen
AU - Zhang, Jia
AU - Pedersen, Christian Marcus
AU - Wang, Yingxiong
AU - Zhao, Tingting
AU - Wang, Pengfei
AU - Liu, Yequn
AU - Qian, Guangren
AU - Qiao, Yan
PY - 2017/1/13
Y1 - 2017/1/13
N2 - Furfural residue (FR) is a low-cost by-product generated in the furfural production from corncobs, which is mainly composed of cellulose and lignin. In this report, hydrothermal carbonization (HTC) of deashed FR was conducted at various reaction temperatures (200, 220 and 240 °C) and reaction times (1-24 h). The chemical and structural properties of obtained biochars were investigated by elemental analysis, high-resolution solid-state 13C NMR, and X-ray photoelectron spectroscopy (XPS). Our experiments indicated that the biochar yields declined with increasing of reaction temperature and time. According to results from NMR and XPS, 240 °C is an essential temperature for biochar formation. At this temperature, changes in the surface properties initiated within 1 h, and the major transformation occurred within 8 h. The dominating change was cellulose fraction reaction forming furanic and aromatic structures in the biochar, which is faster at higher temperatures. In addition, these biochars showed high thermal stability below 300 °C according to thermogravimetric analysis. This study can provide a valuable approach for FR utilization
AB - Furfural residue (FR) is a low-cost by-product generated in the furfural production from corncobs, which is mainly composed of cellulose and lignin. In this report, hydrothermal carbonization (HTC) of deashed FR was conducted at various reaction temperatures (200, 220 and 240 °C) and reaction times (1-24 h). The chemical and structural properties of obtained biochars were investigated by elemental analysis, high-resolution solid-state 13C NMR, and X-ray photoelectron spectroscopy (XPS). Our experiments indicated that the biochar yields declined with increasing of reaction temperature and time. According to results from NMR and XPS, 240 °C is an essential temperature for biochar formation. At this temperature, changes in the surface properties initiated within 1 h, and the major transformation occurred within 8 h. The dominating change was cellulose fraction reaction forming furanic and aromatic structures in the biochar, which is faster at higher temperatures. In addition, these biochars showed high thermal stability below 300 °C according to thermogravimetric analysis. This study can provide a valuable approach for FR utilization
KW - Biochar
KW - Furfural residue
KW - Hydrothermal carbonization
KW - Solid state NMR
KW - Waste valorization
U2 - 10.1002/slct.201602026
DO - 10.1002/slct.201602026
M3 - Journal article
SN - 2365-6549
VL - 2
SP - 583
EP - 590
JO - ChemistrySelect
JF - ChemistrySelect
IS - 2
ER -