Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts

Rivas, Beatriz de; Sampedro, Carmen; Ramos‐Fernández, Enrique V.; López‐Fonseca, Rubén; Gascón, Jorge; Makkee, Michiel; Gutiérrez-Ortiz, José I.

doi:10.1016/j.apcata.2013.02.026

Cited by 47 publications

(24 citation statements)

References 40 publications

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“…On one hand, for the Co-Ni/Al catalyst, the increase in H 2 uptake at a low temperature could be due to the presence of the NiCo 2 O 4 spinel, which possesses a higher specific H 2 uptake than Co 3 O 4 . On the other hand, for the Co/Ce-Al sample, the increase could be related to the reduction of the surface of the ceria, which is known to occur at around 450-500 • C [44], and also the improved reducibility of cobalt oxide due to the insertion of cerium cations into its lattice. Additionally, the onset reduction temperature of the three modified catalysts was clearly lowered.…”

Section: Physico-chemical Characterizationmentioning

confidence: 98%

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

et al. 2020

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Spinel-type cobalt oxide is a highly active catalyst for oxidation reactions owing to its remarkable redox properties, although it generally exhibits poor mechanical, textural and structural properties. Supporting this material on a porous alumina can significantly improve these characteristics. However, the strong cobalt–alumina interaction leads to the formation of inactive cobalt aluminate, which limits the activity of the resulting catalysts. In this work, three different strategies for enhancing the performance of alumina-supported catalysts are examined: (i) surface protection of the alumina with magnesia prior to the deposition of the cobalt precursor, with the objective of minimizing the cobalt–alumina interaction; (ii) coprecipitation of cobalt along with nickel, with the aim of improving the redox properties of the deposited cobalt and (iii) surface protection of alumina with ceria, to provide both a barrier effect, minimizing the cobalt–alumina interaction, and a redox promoting effect on the deposited cobalt. Among the examined strategies, the addition of ceria (20 wt % Ce) prior to the deposition of cobalt resulted in being highly efficient. This sample was characterized by a notable abundance of both Co3+ and oxygen lattice species, derived from the partial inhibition of cobalt aluminate formation and the insertion of Ce4+ cations into the spinel lattice.

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Section: Physico-chemical Characterizationmentioning

confidence: 98%

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

et al. 2020

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“…Interestingly, CeO 2 /HZSM-5 catalyst exhibited better CO 2 and CO x selectivities than did Ag/TiO 2 and CuO/MnO 2 catalyst. Such difference may be due to the presence of more oxygen vacancies and reactive oxygen on the surface of deposited CeO 2 crystallites, in addition to the Brønsted acid sites of HZSM-5, both of which enhance adsorption and activation of pollutants and increase the degree of oxidation [18].…”

Section: Generation Of Co Xmentioning

confidence: 98%

“…The chlorobenzene degradation efficiencies over CeO 2 /HZSM-5, CuO/MnO 2 , and Ag/TiO 2 catalysts and in the empty reactors were 72.6%, 70.7%, 53.3%, and 32.3%, respectively. CeO 2 /HZSM-5 catalyst showed high activity due to its strong acidity (Brønsted acid and Lewis acid) and redox properties (high oxygen storage capacity and effective oxygen mobility in deposited CeO 2 ); chlorobenzene efficiently adsorbs on its acidic site, and oxidation occurs at a nearby redox site [18]. The high efficiency of CuO/MnO 2 catalyst could be ascribed to the abundant oxygen species produced by in situ decomposition of ozone (a byproduct generated in the air plasma reactor) on the MnO 2 surface.…”

Section: Effect Of the Catalysts On Chlorobenzene Removalmentioning

confidence: 99%

“…Loading noble metals with TiO 2 improves the photocatalytic activity under UV and visible light [20]. De Rivas [18] reported that introduction of CeO 2 to HZSM-5 led to high catalytic activity and stability. In the present study, we used a cylindrical dielectric-barrier discharge (DBD) configuration, which is one of the typical systems for producing non-thermal plasma.…”

Section: Introductionmentioning

confidence: 99%

“…Chlorine atoms in chlorobenzene can be converted into hydrogen chloride, molecular chlorine, and chlorinated benzene derivatives [18]. Chlorine species easily adsorb on the catalyst surface, resulting in catalyst deactivation.…”

Section: Introductionmentioning

confidence: 99%

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Performance of chlorobenzene removal in a nonthermal plasma catalysis reactor and evaluation of its byproducts

Zhu

Mao

Jiang

et al. 2015

Chemical Engineering Journal

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Al‐modified Mesoporous SiO₂‐matrix‐supported Uniform CeO₂ Nanodots with Superior Catalytic Efficiency in DCE Combustion

et al. 2022

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Adjusting the acidity and/or oxygen species on the surface of metal oxide nanostructures could fabricate the high active and durable catalysts for the combustion of chlorinated volatile organic compounds (CVOCs). Herein, Al‐modified mesoporous SiO2 matrix supported uniform CeO2 nanodots (CeO2@xAlSiO2) was synthesized and evaluated in dichloroethane (DCE) catalytic combustion. From the systematic study of the texture structure, surface properties, and catalytic activity, we deduced that the improved surface acidity and oxygen species activity enhanced the DCE conversion and reduced the formation of chlorinated organic byproduct, while increasing the formation of the desired product, HCl. The optimized CeO2@0.5AlSiO2 sample showed superior activity (90 % conversion of DCE at 260 °C), excellent durability (at 280 °C for 60 h) and good tolerance towards moisture (in 1 % and 3 % moisture for 10 h, respectively). Our work identified the important role of surface acidity and oxygen species over these functionalized catalysts, providing guidance for the advanced catalyst design.

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Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts

Cited by 47 publications

References 40 publications

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

Performance of chlorobenzene removal in a nonthermal plasma catalysis reactor and evaluation of its byproducts

Al‐modified Mesoporous SiO₂‐matrix‐supported Uniform CeO₂ Nanodots with Superior Catalytic Efficiency in DCE Combustion

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Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts

Cited by 47 publications

References 40 publications

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

Comparative Study of Strategies for Enhancing the Performance of Co3O4/Al2O3 Catalysts for Lean Methane Combustion

Performance of chlorobenzene removal in a nonthermal plasma catalysis reactor and evaluation of its byproducts

Al‐modified Mesoporous SiO2‐matrix‐supported Uniform CeO2 Nanodots with Superior Catalytic Efficiency in DCE Combustion

Contact Info

Product

Resources

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Al‐modified Mesoporous SiO₂‐matrix‐supported Uniform CeO₂ Nanodots with Superior Catalytic Efficiency in DCE Combustion