Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water

Navas, Marisa Belén; Bideberrripe, Hernán P.; Cabello, Carmen I.; Gazzoli, Delia; Casella, Mónica Laura; Jaworski, María Angélica

doi:10.1016/j.cattod.2020.08.012

Cited by 8 publications

(7 citation statements)

References 69 publications

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“…The results of NO 2 – , NO 3 – , and BrO 3 – elimination using the powder catalysts in a batch system (previously informed by Navas et al) and the structured catalyst C1 in a fixed-bed reactor at a different flow, after 5 h of reaction, are shown in Table .…”

Section: Resultsmentioning

confidence: 93%

“…It is probable that OH – anions can diffuse from the catalyst surface to the bulk liquid without changing the pH . This behavior can be attributed to the mesoporous character of the support 10ZrCe and results in a very low formation of NH 4 + .…”

Section: Resultsmentioning

confidence: 99%

“…Conversion values of NO 2 – ( X NO 2 – %), NO 3 – ( X NO 3 – %), and BrO 3 – ( X BrO 3 – %) and the selectivities toward NO 2 – ( S NO 2 – %), NH 4 + ( S NH 4 + %), N 2 ( S N 2 %), and Br – ( S Br – %) were calculated according to the equations described in a previous work …”

Section: Methodsmentioning

confidence: 99%

“…Different inert supports such as Al 2 O 3 , SiO 2 , and activated carbon have been used in the catalytic elimination of NO 3 – from water. , In addition, these inert supports have been combined with redox supports, such as ZrO 2 and CeO 2 . , In the same way, the active phase used usually contains a precious metal (Pd, Pt, Rh, and Ru) promoted with a second metal (Cu, Ni, Mo, Co, and Sn). , The best catalytic results were found using the PdCu active phase. , …”

Section: Introductionmentioning

confidence: 99%

“…These catalysts allowed obtaining promising results in the elimination of NO 3 – , NO 2 – , and BrO 3 – from water. From the characterization results (textural properties, XRD, Raman, and FTIR), it was highlighted that the materials obtained were mesoporous, had oxygen vacancies, and the presence of Zr 4+ ions in the CeO 2 network increased the number of the oxygen vacancies on the 10ZrCe support . These catalysts were evaluated first as dispersed powders, in order to minimize the diffusion effects of products and reagents on the catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

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Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Peroni

Navas

Bideberripe

et al. 2021

Ind. Eng. Chem. Res.

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The elimination of hazardous oxyanions NO 3 − , NO 2 − , and BrO 3 − from synthetic and real water samples using novel PdCu/10ZrCe (10 wt % ZrO 2 on CeO 2 ) structured catalysts supported on cordierite monoliths was studied in order to avoid loss of the catalytic material during water treatment. The monoliths were coated with different suspensions of the 10ZrCe support. Particle sizes, suspension concentration of 10ZrCe, and pH effects were evaluated. The structured catalyst was tested in a fixed-bed reactor at different flow rates for the elimination of the selected anions. Good results in terms of activity and selectivity to the products of interest (S N 2 : 0.99 and S Br − :1) were obtained in synthetic water. The structured catalyst was reused three times, maintaining its activity and selectivity. It was evaluated in a real water sample but the activity was lower probably due to competition for active sites by different ions present in the sample. The structured catalyst prepared is promising for the development of a system for water remediation, based on PdCu/ZrO 2 −CeO 2 materials.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Peroni

Navas

Bideberripe

et al. 2021

Ind. Eng. Chem. Res.

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Synthesis of Vinyl Acetate Monomer Over PdCu Alloys: The Role of Surface Oxygenation in the Reaction Path

Gonzalez Caranton,

Schmal,

Checca Huaman

et al. 2023

Macro Reaction Engineering

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This work uses sol–gel and sonochemical methods to prepare bimetallic PdCu catalysts supported on modified ZrO2 with Ti and Al. The catalysts are tested for vinyl acetate synthesis from ethylene, acetic acid, and oxygen, varying the reaction temperature for two catalysts prepared, which show higher activity. Catalysts characterization results show bimetallic species and distort alloys with a dispersed distribution of active metal onto the support. The in situ reaction by DRIFT‐MS identifies the surface formation of main intermediates like palladium acetate monomers and mono and bidentate intermediates, associated to vinyl acetate formation, like vinyl hydrogenated species over PdCu. Finally, this behavior will be attributed to the bimetallic distortions of PdCu samples, provided by interaction effects between PdCu and supports, indicating a more exposition of PdCu species suitable for the reaction, according to high‐resolution transmission microscopy electron microscopy results for PdCu/ZrTi sample. Thus, this sample exhibits a minimal formation of sub‐products and catalytic stability for 18 hh. These results evidence the participation of hydroxyls and oxygen vacancies of the catalyst in the catalytic reaction measured in situ, monitoring the products formed at the reactor outlet. Finally, it is proposed a reaction pathway as a function of reaction conditions.

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Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

Zoppas,

Sacco,

Aghemo

et al. 2024

Advances in Material Research and Technology

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Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water

Cited by 8 publications

References 69 publications

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Synthesis of Vinyl Acetate Monomer Over PdCu Alloys: The Role of Surface Oxygenation in the Reaction Path

Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

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Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water

Cited by 8 publications

References 69 publications

Development of PdCu Structured Catalysts Based on ZrO2–CeO2 Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Development of PdCu Structured Catalysts Based on ZrO2–CeO2 Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Synthesis of Vinyl Acetate Monomer Over PdCu Alloys: The Role of Surface Oxygenation in the Reaction Path

Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

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Product

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Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions