TY - JOUR
T1 - Biochar production from date palm waste
T2 - Charring temperature induced changes in composition and surface chemistry
AU - Usman, Adel R.A.
AU - Abduljabbar, Adel
AU - Vithanage, Meththika
AU - Ok, Yong Sik
AU - Ahmad, Mahtab
AU - Ahmad, Munir
AU - Elfaki, Jamal
AU - Abdulazeem, Sallam S.
AU - Al-Wabel, Mohammed I.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - The biochars (BC) were prepared from date palm waste to investigate the influence of pyrolysis temperature (300-800 °C) on composition and surface chemistry of BC. The results showed that fixed C, ash and basic cations of BC increased while its moisture, volatiles and elemental composition (O, H, N and S) decreased with increasing pyrolysis temperature. As the surface basicity of biochar increased by increasing pyrolysis temperature, the values of pH and pHpzc were increased. The biochars produced at low pyrolysis temperature do possess some functional properties of their feedstock, whereas the aromatic functional units in biochar samples were condensed with increasing pyrolysis temperature. In this context, readily and potentially labile C oxidized using KMNO4 and K2Cr2O7 decreased with pyrolysis temperature, whereas recalcitrant C followed the opposite trend. Stronger correlations were found between volatile matter and O/C (r2 = 0.9971) than those conducted between volatile matter and H/C (r2 = 0.9325). Date palm-derived BC at 500 °C with a volatile matter less than 10% and O/C of 0.02-0.05, could be more appropriate for C sequestration. The BC may thus represent potential alternative materials for environmental management, depending upon pyrolysis temperature.
AB - The biochars (BC) were prepared from date palm waste to investigate the influence of pyrolysis temperature (300-800 °C) on composition and surface chemistry of BC. The results showed that fixed C, ash and basic cations of BC increased while its moisture, volatiles and elemental composition (O, H, N and S) decreased with increasing pyrolysis temperature. As the surface basicity of biochar increased by increasing pyrolysis temperature, the values of pH and pHpzc were increased. The biochars produced at low pyrolysis temperature do possess some functional properties of their feedstock, whereas the aromatic functional units in biochar samples were condensed with increasing pyrolysis temperature. In this context, readily and potentially labile C oxidized using KMNO4 and K2Cr2O7 decreased with pyrolysis temperature, whereas recalcitrant C followed the opposite trend. Stronger correlations were found between volatile matter and O/C (r2 = 0.9971) than those conducted between volatile matter and H/C (r2 = 0.9325). Date palm-derived BC at 500 °C with a volatile matter less than 10% and O/C of 0.02-0.05, could be more appropriate for C sequestration. The BC may thus represent potential alternative materials for environmental management, depending upon pyrolysis temperature.
KW - Black carbon
KW - Date palm
KW - Pyrolysis temperature
KW - Recalcitrant form
KW - Volatile matter
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U2 - 10.1016/j.jaap.2015.08.016
DO - 10.1016/j.jaap.2015.08.016
M3 - Article
AN - SCOPUS:84942294131
VL - 115
SP - 392
EP - 400
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
SN - 0165-2370
ER -