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dc.contributor.authorSalgin, Ugur
dc.contributor.authorYildiz, Nuray
dc.contributor.authorKoeroglu, Fatmanur
dc.contributor.authorCalimli, Ayla
dc.date.accessioned2019-07-27T12:10:23Z
dc.date.accessioned2019-07-28T10:17:24Z
dc.date.available2019-07-27T12:10:23Z
dc.date.available2019-07-28T10:17:24Z
dc.date.issued2007
dc.identifier.issn0896-8446
dc.identifier.urihttps://dx.doi.org/10.1016/j.supflu.2006.02.007
dc.identifier.urihttps://hdl.handle.net/20.500.12418/10717
dc.descriptionWOS: 000242642500002en_US
dc.description.abstractSupercritical fluid desorption has been carried out in a fixed bed column to desorp nitrophenolic compounds from organically modified bentonite. The experiments were carried out in the sequence of synthesis of organobentonite (HDTMA-B) and then adsorption of phenolic compounds to organobentonite in aqueous solutions, desorption of phenolic compounds from organobentonite using supercritical fluids (SCFs) and adsorption of nitrophenols to regenerated organobentonite. The desorption parameters such as pressure (20-40 MPa), temperature (40-100 degrees C) and co-solvent concentration (2.5-20 vol.%) were investigated at 2 ml/min flow rate. While the desorption yield of o-nitrophenol (oNP) was 93 wt.% using supercritical CO2 (SC CO2) by operating at 20 MPa, 40 degrees C, 2 ml CO2/min in 2 h of desorption, the desorption yields of M-nitrophenol (mNP) and p-nitrophenol (pNP) reached up to 71.8 wt.% (at 20 MPa, 60 degrees C using 7.5 vol.% ethanol) and 50 wt.% (at 40 MPa, 60 degrees C, 10 vol.% ethanol), respectively. In addition, the results showed that the regenerated HDTMA-bentonite toward nitrophenols exhibited changing adsorption capacity after several regeneration cycles. It was therefore concluded that exhausted/used organobentonites might be regenerated via processes involving supercritical fluid extraction. (C) 2006 Elsevier B.V. All rights reserved.en_US
dc.language.isoengen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.isversionof10.1016/j.supflu.2006.02.007en_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectadsorbent regenerationen_US
dc.subjectdesorptionen_US
dc.subjectsupercritical fluidsen_US
dc.subjectmodified bentoniteen_US
dc.subjectnitrophenolsen_US
dc.titleA parametric study of phenolic compounds desorption performance from organobentonite by supercritical fluidsen_US
dc.typearticleen_US
dc.relation.journalJOURNAL OF SUPERCRITICAL FLUIDSen_US
dc.contributor.departmentAnkara Univ, Fac Engn, Dept Chem Engn, TR-06100 Ankara, Turkey -- Cumhuriyet Univ, Fac Engn, Dept Chem Engn, TR-58140 Sivas, Turkeyen_US
dc.identifier.volume39en_US
dc.identifier.issue3en_US
dc.identifier.endpage303en_US
dc.identifier.startpage296en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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