Adsorption kinetics, equilibrium and thermodynamics of gas-phase toluene onto char produced from almond shells

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dc.contributor.authorKutluay, Sinan
dc.contributor.authorBaytar, Orhan
dc.contributor.authorŞahin, Ömer
dc.date.accessioned2024-12-24T19:16:12Z
dc.date.available2024-12-24T19:16:12Z
dc.date.issued2019
dc.departmentSiirt Üniversitesi
dc.description.abstractToluene is the primary material in chemical process industries and is often usedas a raw material in the production of many chemicals and as a solvent in manyengineering processes. In this study, the material of char, which is used as anadsorbent, was produced from almond shells. The adsorption process of gasphase toluene onto char was investigated using a laboratory-scale fixed-bedreactor under atmospheric pressure. The structure of the char was characterizedby BET and FTIR. The influences of adsorption parameters such as nitrogen (N2)flow rate as the gas-phase toluene carrier, char amount, gas-phase tolueneconcentration at the inlet and the adsorption temperature on both theadsorption capacity and adsorption efficiency were examined. It was found thatthe adsorption of the gas-phase toluene onto char could be well represented bythe pseudo-second-order kinetic model. Equilibrium isotherm data wereanalyzed by the Langmuir and Freundlich isotherm models and the resultsindicated that the adsorption process was described well by the Langmuirisotherm model. The maximum monolayer adsorption capacity (qmax) of the charwas determined as 15.42 mg g-1 for 303 K. Thermodynamic parameters such as?G° = -7.93 kJ mol-1, ?H°= -17.18 kJ mol-1, ?S°= -0.013 kJ mol-1 K-1 showed that theadsorption process was spontaneous, exothermic and physical. The resultsshowed that the material of char produced from almond shells could be used asa biosorbent to remove the material of gas-phase toluene from various industrialand natural sources through the adsorption method.
dc.identifier.doi10.17515/resm2019.73en1122
dc.identifier.endpage298
dc.identifier.issn2148-9807
dc.identifier.issn2149-4088
dc.identifier.issue3
dc.identifier.startpage279
dc.identifier.trdizinid347551
dc.identifier.urihttps://doi.org/10.17515/resm2019.73en1122
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/347551
dc.identifier.urihttps://hdl.handle.net/20.500.12604/4268
dc.identifier.volume5
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.relation.ispartofResearch on Engineering Structures and Materials
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.subjectKimya
dc.subjectUygulamalı,Mühendislik
dc.subjectKimya
dc.titleAdsorption kinetics, equilibrium and thermodynamics of gas-phase toluene onto char produced from almond shells
dc.typeArticle

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