TY - JOUR
T1 - Biochar production from waste rubber-wood-sawdust and its potential use in C sequestration
T2 - Chemical and physical characterization
AU - Ghani, Wan Azlina Wan Abdul Karim
AU - Mohd, Ayaz
AU - da Silva, Gabriel
AU - Bachmann, Robert T.
AU - Taufiq-Yap, Yun H.
AU - Rashid, Umer
AU - Al-Muhtaseb, Ala'a H.
N1 - Funding Information:
The authors express their gratitude to the Ministry of Science, Technology and Innovation (MOSTI) of Malaysia , Academy Science of Malaysia and Ministry of Higher Education (MOHE) of Malaysia ( FRGS 03-01-04-799FR/5523839 ) for financial support and also thankful to University of Melbourne, Australia.
PY - 2013/1
Y1 - 2013/1
N2 - Biochars have received increasing attention because of their potential environmental applications such as soil amending and atmospheric C sequestration. In this study, biochar was produced from waste rubber-wood-sawdust. The produced biochars were characterized by Brunauer-Emmett-Teller (BET) gas porosimetry, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). Pyrolysis temperature was shown to have a strong influence on both thermal and chemical characteristic of biochar samples. The experimental data shows that the biochar samples can absorb around 5% water by mass (hydrophilic) at lower temperatures (<550°C), and that lignin is not converted into a hydrophobic polycyclic aromatic hydrocarbon (PAH) matrix. At higher temperatures (>650°C), biochar samples were thermally stable and became hydrophobic due to the presence of aromatic compounds. Carbon content (over 85%) increased with increasing temperature, and showed an inverse effect to the elemental ratios of H/C and O/C. The very low H/C and O/C ratios obtained for the biochar indicated that carbon in this material is predominantly unsaturated. BET results showed that the sawdust derived biochars have surface areas between 10 and 200m2g-1 and FTIR indicated an aromatic functional group about 866cm-1 in most of the samples. The rate of CO2 adsorption on sawdust derived biochar generally increased with increasing temperature from 450 to 650°C but then decreased with increase in the production temperature. Derived biochar represents a potential alternative adsorbent for C sequestration.
AB - Biochars have received increasing attention because of their potential environmental applications such as soil amending and atmospheric C sequestration. In this study, biochar was produced from waste rubber-wood-sawdust. The produced biochars were characterized by Brunauer-Emmett-Teller (BET) gas porosimetry, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). Pyrolysis temperature was shown to have a strong influence on both thermal and chemical characteristic of biochar samples. The experimental data shows that the biochar samples can absorb around 5% water by mass (hydrophilic) at lower temperatures (<550°C), and that lignin is not converted into a hydrophobic polycyclic aromatic hydrocarbon (PAH) matrix. At higher temperatures (>650°C), biochar samples were thermally stable and became hydrophobic due to the presence of aromatic compounds. Carbon content (over 85%) increased with increasing temperature, and showed an inverse effect to the elemental ratios of H/C and O/C. The very low H/C and O/C ratios obtained for the biochar indicated that carbon in this material is predominantly unsaturated. BET results showed that the sawdust derived biochars have surface areas between 10 and 200m2g-1 and FTIR indicated an aromatic functional group about 866cm-1 in most of the samples. The rate of CO2 adsorption on sawdust derived biochar generally increased with increasing temperature from 450 to 650°C but then decreased with increase in the production temperature. Derived biochar represents a potential alternative adsorbent for C sequestration.
KW - Biochar
KW - C sequestration
KW - Characterization
KW - Pyrolysis
KW - Rubber-wood-sawdust
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U2 - 10.1016/j.indcrop.2012.10.017
DO - 10.1016/j.indcrop.2012.10.017
M3 - Article
AN - SCOPUS:84868687615
SN - 0926-6690
VL - 44
SP - 18
EP - 24
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -