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

Wan Azlina Wan Abdul Karim Ghani, Ayaz Mohd, Gabriel da Silva, Robert T. Bachmann, Yun H. Taufiq-Yap, Umer Rashid, Ala'a H. Al-Muhtaseb

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

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 (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.

Original languageEnglish
Pages (from-to)18-24
Number of pages7
JournalIndustrial Crops and Products
Volume44
DOIs
Publication statusPublished - Jan 2013

Fingerprint

biochar
sawdust
rubber
Fourier transform infrared spectroscopy
temperature
aromatic compounds
thermogravimetry
sampling
carbon
pyrolysis
adsorbents
X-ray diffraction
surface area
adsorption
scanning electron microscopy
carbon dioxide
gases
heat

Keywords

  • Biochar
  • C sequestration
  • Characterization
  • Pyrolysis
  • Rubber-wood-sawdust

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

Biochar production from waste rubber-wood-sawdust and its potential use in C sequestration : Chemical and physical characterization. / Ghani, Wan Azlina Wan Abdul Karim; Mohd, Ayaz; da Silva, Gabriel; Bachmann, Robert T.; Taufiq-Yap, Yun H.; Rashid, Umer; Al-Muhtaseb, Ala'a H.

In: Industrial Crops and Products, Vol. 44, 01.2013, p. 18-24.

Research output: Contribution to journalArticle

Ghani, Wan Azlina Wan Abdul Karim ; Mohd, Ayaz ; da Silva, Gabriel ; Bachmann, Robert T. ; Taufiq-Yap, Yun H. ; Rashid, Umer ; Al-Muhtaseb, Ala'a H. / Biochar production from waste rubber-wood-sawdust and its potential use in C sequestration : Chemical and physical characterization. In: Industrial Crops and Products. 2013 ; Vol. 44. pp. 18-24.
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