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Biochar production from waste rubber-wood-sawdust and its potential use in C sequestration: chemical and physical characterization


Wan Ab. Karim Ghani, Wan Azlina and Mohd, Ayaz and Da Silva, Gabriel and Bachman, Robert T. and Yap, Taufiq Yun Hin and Rashid, Umer and Al-Muhtaseb, Ala'a H. (2013) Biochar production from waste rubber-wood-sawdust and its potential use in C sequestration: chemical and physical characterization. Industrial Crops and Products, 44. pp. 18-24. ISSN 0926-6690; ESSN: 1872-633X


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 200 m2 g−1 and FTIR indicated an aromatic functional group about 866 cm−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.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.indcrop.2012.10.017
Publisher: Elsevier
Keywords: Biochar; Rubber-wood-sawdust; Pyrolysis; Characterization; C sequestration
Depositing User: Muizzudin Kaspol
Date Deposited: 17 Jun 2014 02:05
Last Modified: 25 Nov 2016 08:29
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.indcrop.2012.10.017
URI: http://psasir.upm.edu.my/id/eprint/28521
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