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AuthorAbu Safieh K.A.
AuthorAl-Degs Y.S.
AuthorSunjuk M.S.
AuthorSaleh A.I.
AuthorAl-Ghouti M.A.
Available date2022-05-31T19:01:17Z
Publication Date2015
Publication NameEnvironmental Technology (United Kingdom)
ResourceScopus
Identifierhttp://dx.doi.org/10.1080/09593330.2014.938125
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84911970602&doi=http://dx.doi.org/10.1080%2f09593330.2014.938125&partnerID=40&md5=596fe3c9122eacd1b2d5cb922f162fc0
URIhttp://hdl.handle.net/10576/31801
AbstractWith a total concentration of 7055 mgS/kgfuel, the content of organosulphur compounds (OSCs) in local diesel is 20 times higher than the regulated value. Analysis revealed that 30% of OSC is originated from dibenzothiophene (DBT). It is known that DBT is a hardly removable compound and selective adsorbents are often needed for its removal with low affinity for other diesel components. In this work, a selective adsorbent based on surface modification of activated carbon (AC) by MnO2 is prepared for DBT removal from diesel. The porous nature of AC enabled carrying large amounts of MnO2 particles to end up with a selective adsorber for DBT. The best performance was observed at a surface loading of 26.8% of Mn and DBT is favourably removed over mono- and diaromatics hydrocarbons in diesel. Adsorption kinetics of DBT is studied under a high initial concentration of 835-11,890 mg/kg and at a ratio of 11 cm3/g (diesel:carbon). The results indicated a fast removal process after surface modification where 96% of the surface is occupied within 30 min of interaction. Kinetic data were best presented by reaction-based models with low prediction error sum of squares values 0.5-47.0, while, diffusion-based models showed limited application for modelling DBT adsorption. Accordingly, adsorption process is controlled by surface reactions and pore diffusion has a minor role in the overall process. The modified adsorbent is satisfactorily regenerated using n-hexane at 65�C.
Languageen
PublisherTaylor and Francis Ltd.
Subjectactivated carbon
adsorption kinetics
dibenzothiophene
diesel
surface modification
TitleSelective removal of dibenzothiophene from commercial diesel using manganese dioxide-modified activated carbon: A kinetic study
TypeArticle
Pagination98-105
Issue Number1
Volume Number36
dc.accessType Abstract Only


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