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<strong>Preparation of a novel and highly stable Al-Fe loaded sepiolite catalyst for the CWPO of methyl orange: Optimization of physicochemical parameters, kinetics and thermodynamics studies</strong>

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Title Statement <strong>Preparation of a novel and highly stable Al-Fe loaded sepiolite catalyst for the CWPO of methyl orange: Optimization of physicochemical parameters, kinetics and thermodynamics studies</strong>
 
Added Entry - Uncontrolled Name Kıpçak, İlker ; Eskişehir Osmangazi University
 
Uncontrolled Index Term Catalyst characterization; Catalytic wet peroxide oxidation (CWPO); Kinetics;Methyl orange; Sepiolite; Thermodynamics
 
Summary, etc. <span>Al-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, </span><em>p</em><span>H, H</span><span>2</span><span>O</span><span>2</span><span> 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 </span><em>p</em><span>H 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 (</span><em>k</em><span>1</span><span> = 0.0049 min</span><span>-1</span><span> at 25°C). The activation energy (</span><em>E<span>a</span></em><span>) of the reaction over this catalyst is foundas 29.48 kJ mol</span><span>-1</span><span>. It was also found that the catalytic oxidation process is endothermic (</span><em>ΔH</em><span> = 26.99 kJ mol</span><span>-1</span><span>) and nonspontaneous (</span><em>ΔG</em><span> = 96.72 kJ mol</span><span>-1</span><span> at 25°C). The catalyst is chemically stable and reusable with low release of iron.</span>
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2021-03-03 11:49:07
 
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http://op.niscair.res.in/index.php/IJCT/article/view/30318
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 27, ##issue.no## 5 (2020): Indian Journal of Chemical Technology
 
Language Note en