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dc.contributor.authorKalpazan, Esin-
dc.identifier.issn0975-0991 (Online); 0971-457X (Print)-
dc.description.abstractAl-Fe loaded sepiolite catalysts with different active metal ratio have been synthesized using a Turkish sepiolite sample from Eskişehir region. Liquid phase catalytic oxidation of methyl orange azo dye has been carried out over Al-Fe/sepiolite catalysts using hydrogen peroxide as oxidant. The catalytic studies are performed in a glass reactor under atmospheric pressure by semi-batch operation. The effects of several parameters such as catalyst amount, metal loading, calcination temperature, pH, H2O2 concentration, reaction temperature and time on the methyl orange elimination have been examined. The elimination rate of 90.68% was achieved when studied with the catalyst with 8% active metal ratio (SepAlFe8) at pH 3.7 and 25°C. Kinetics studies show the degradation of methyl orange over the SepAlFe8 catalyst could be expressed by the pseudo-first-order reaction kinetics (k1 = 0.0049 min-1 at 25°C). The activation energy (Ea) of the reaction over this catalyst is foundas 29.48 kJ mol-1. It was also found that the catalytic oxidation process is endothermic (ΔH = 26.99 kJ mol-1) and nonspontaneous (ΔG = 96.72 kJ mol-1 at 25°C). The catalyst is chemically stable and reusable with low release of iron.en_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.rights CC Attribution-Noncommercial-No Derivative Works 2.5 Indiaen_US
dc.sourceIJCT Vol.27(5) [September 2020]en_US
dc.subjectCatalyst characterizationen_US
dc.subjectCatalytic wet peroxide oxidation (CWPO)en_US
dc.subjectMethyl orangeen_US
dc.titlePreparation of a novel and highly stable Al-Fe loaded sepiolite catalyst for the CWPO of methyl orange: Optimization of physicochemical parameters, kinetics and thermodynamics studiesen_US
Appears in Collections:IJCT Vol.27(5) [September 2020]

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