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AuthorAli R.
AuthorAslam Z.
AuthorShawabkeh R.A.
AuthorAsghar A.
AuthorHussein I.A.
Available date2022-04-25T10:59:47Z
Publication Date2020
Publication NameTurkish Journal of Chemistry
ResourceScopus
Identifierhttp://dx.doi.org/10.3906/KIM-1909-20
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85085386340&doi=10.3906%2fKIM-1909-20&partnerID=40&md5=2376594c2485956d74b6d9248817d7d5
URIhttp://hdl.handle.net/10576/30418
AbstractActivated carbon (AC), a porous material with high pore volume, attracts increasing attention owing to its potential applications in several fields. The development of a porous structure in AC marginally relies on both the treatment methods and the type of precursor. Thus far, both renewable and nonrenewable precursor sources have been used to synthesize AC with high surface area and pore volume. This study presents the synthesis of AC via physicochemical treatment of waste oil fly ash (OFA), a waste material produced from power plants. The aim was to produce AC by adding surface pores and surface functional groups to the basal plane of OFA. Toward this objective, OFA was first chemically leached/activated with various combinations of H2 SO4 and H3PO4 , and then physically activated with CO2 at 900 °C. The chemical activation step, synergistically combined with CO2 activation, resulted in an increase of 24 times the specific surface area of the OFA. The maximum increase in surface area was obtained for the sample physicochemically treated with 100% H2 SO4 . Moreover, the spectroscopic analysis confirmed the presence of acid functional groups after the chemical treatment step. To explore the surface heterogeneity, adsorptive potential distribution in terms of surface energy was also discussed as a function of the surface coverage. Following chemical activation, the OFA surface became heterogeneous. A major portion of the AC showed surface energy in the range of 40–50 erg/K, which was further increased as a result of physical activation at a higher temperature. Thus, the synergism created by physicochemical activation resulted in a material with high surface area and pore volume, and excellent adsorption characteristics. From the findings of this study, it was concluded that OFA is a cost-effective and environmentally benign precursor for the synthesis of AC.
SponsorThe authors would like to acknowledge the support of King Abdul Aziz City for Science and Technology (KACST) through the science and technology unit at King Fahd University of Petroleum & Minerals (KFUPM) for their funding this research, under project number 11-ENV1645-04.
Languageen
PublisherTUBITAK
SubjectActivated carbon
Oil fly ash
Physicochemical activation
Surface energy
Waste utilization
TitleBET, FTIR, and RAMAN characterizations of activated carbon from waste oil fly ash
TypeArticle
Pagination279-295
Issue Number2
Volume Number44
dc.accessType Abstract Only


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