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AuthorShawabkeh, R.A.
AuthorAslam, Z.
AuthorHussien, I.A.
Available date2015-12-15T06:53:50Z
Publication Date2015-12
Publication NameJournal of Thermal Analysis and Calorimetry
CitationShawabkeh, R.A. et al. "Thermochemical treatment of fly ash for synthesis of mesoporous activated carbon", Journal of Thermal Analysis and Calorimetry, 2015, 122:3, 1191-1201. Available online August 2015.
AbstractA mesoporous activated carbon is produced from oil fly ash (OFA) using chemical and thermal treatments at different activation conditions. The ash samples were refluxed with a range of compositions of sulfuric, nitric, and phosphoric acids followed by thermal activation in a tubular reactor. The composition of the acids and the reaction temperature were optimized to yield mesoporous activated carbon with a high surface area and yield. Several characterization methods were used to study the surface characteristics, morphology, functional groups, phase transition, and adsorption. FTIR spectra show the existence of carboxylic and amine functional groups, which increase with increasing percentage of nitric acid. SEM spot analysis and EDX demonstrate that the carbon content increases from 77.4 to 95.7 % upon chemical treatment. Specimens treated with a mixture comprises of 3.6 mol L-1 H2SO4, 6.4 mol L-1 HNO3 and 5.9 mol L-1 H3PO4 and activated at 990 degrees C have a BET surface area of 375.7 m2 g-1 when compared to 4 m2 g-1 for the original OFA. The BJH adsorption pore distribution indicates an average pore size of 50 ? with a total mesopore volume of 0.2211 cm3 g-1 (73.6 % of the total pore volume). Thus, waste OFA is a suitable raw material for the production of activated carbon.
SponsorKing Abdul Aziz City for Science and Technology (KACST) through the science and technology unit at King Fahd University of Petroleum and Minerals (KFUPM) project No. 11- ENV1645-04
PublisherSpringer Netherlands
SubjectActivated carbon
Fly ash
Thermochemical treatment
TitleThermochemical treatment of fly ash for synthesis of mesoporous activated carbon
Issue Number3
Volume Number122

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