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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 11, No. 1, 2014, pp. 159-168
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Bioline Code: st14017
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 11, No. 1, 2014, pp. 159-168
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Characterization of activated carbon obtained from Saudi Arabian fly ash
Mofarrah, A.; Husain, T. & Bottaro, C.
Abstract
This study investigated the potential application
of heavy oil burning fly ash as a precursor to prepare
activated carbon. The raw fly ash obtained from a power
plant is cleaned by nitric acid/hydrochloric acid and activated
at 550-800 °C with hold times of 30 and 60 min to
obtain fly ash activated carbon. The phosphoric acid is used
as a chemical agent to improve the surface characteristics
of the cleaned fly ash. The effects of process variables such
as amount of chemical reagents, activation time and temperature
were investigated according to two-levels full
factorial design. The resultant activated carbons were
characterized in terms of Brunauer, Emmett and Teller
surface area and total and pore volume. The maximum
specific surface area was found of 148.30 m2/g at 800 °C
temperatures with 60 min holding time. The test showed
that the surface area and pore volumes of the material are
also significantly enhanced by the activation process.
Keywords
Chemical activation; Factorial design; Surface area; Unburned carbon
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