A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin

Mendow, Gustavo; Sánchez, Agustina; Grosso, César L.; Querini, C.A.

doi:10.1016/j.jece.2017.01.033

Cited by 35 publications

(19 citation statements)

References 37 publications

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“…Furthermore, the utilization of resins to remove impurities from materials in liquid phase requires more attention because this would not only create a clean environment but also have great industrial applications. 2.0 wt% of Pd rate constant of about 1.25 and 1.6 L g À 1 min À 1 were obtained for the various catalyst Pd@IRA-900 and Pd@IRA-958, respectively Pd@IRA-958 performed better [24] reduction of nitrate in water PdÀ Cu catalysts embedded in ionic resin atmospheric pressure and between 20-22°C increasing the flowrate of H 2 had negligible effects on nitrate removal The product; water was tested and found to meet the desired standard set by World Health Organization [91] nitrate reduction bi-metallic PdÀ Cu catalyst supported on ionic resins (cationic and anionic) reaction condition of 1 bar and 25°C…”

Section: Discussionmentioning

confidence: 96%

“…Nitrate reduction over bi-metallic PdÀ Cu catalyst supported on ionic resins (cationic and anionic) was carried out (with reaction conditions of 1 bar and 25°C) by Gašparovičová et al [92] Results showed 4 times better activity of anionic resins when compared to the cationic resins. However, when compared with Al 2 O 3 supported PdÀ Cu catalyst, [91] lower activity was observed, but the N 2 selectivity showed significant improvement. Kim et al [93] studied ion exchange of nitrates in an integrated batch system using catalyst reduction process at two different reaction conditions; 3 and 6 bar for pressure and 25 and 60°C as reaction temperature.…”

Section: Hydrogenation Reactionmentioning

confidence: 89%

“…Reduction of nitrate in water by PdÀ Cu catalysts embedded in ionic resin using a novel process was reported by Mendow et al [91] Water contaminated with nitrates was treated over the bi-metallic catalyst embedded in an anion resin using two novel processes in a continuous fixed bed reactor operated at atmospheric pressure and between 20-22°C. Results from their study revealed that increasing the flowrate of H 2 had negligible 97 mol% of Triolein reaction rates; 9.3 × 10 À 7 (triglyceride to diglyceride) 2.5 × 10 À 6 (diglyceride to monoglyceride) and 7.5 × 10 À 5 Lmol À 1 s À 1 monoglyceride to glycerol, respectively.…”

Section: Hydrogenation Reactionmentioning

confidence: 99%

“…[89] In order to enhance the catalyst (Pd), several researchers have prepared Pd catalyst on support such as alumina (Al 2 O 3 ) and activated carbon using the wet impregnation method. [90,91] Hydrodechlorination of triclosan in water over palladium supported on anion resin was studied at ambient conditions by Han et al [24] IRA-900 and IRA-958 anion resins (strong base) with polystyrene and polyacrylic structures, respectively, were used as supports for catalysts prepared via an ion exchange uptake of PDCL42-followed by further reduction of Pd (II) to Pd (0). Morphology of the catalysts showing evenly distributed Pd (0) nanoparticles (3-5 nm) on the surface of the resin was analyzed using SEM and TEM.…”

Section: Hydrogenation Reactionmentioning

confidence: 99%

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The Functionality of Ion Exchange Resins for Esterification, Transesterification and Hydrogenation Reactions

Osazuwa

Abidin

2020

ChemistrySelect

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Ion exchange resins (IER) possess a catalytically flexible structure which enables them to be easily applied for renewable energy production and environmentally friendly reactions. More specifically, they can be used as catalyst or catalyst support in other industrialized processes such as; esterification, transesterification and hydrogenation reactions. Several works on esterification, transesterification and hydrogenation reactions are in literature. This study reviews some of these works which includes the utilization of IER in esterification, trans-esterification and hydrogenation reactions. Recent reports show that IER are conventionally used as catalyst in esterification and transesterification reactions. For hydrogenation reactions, IER have been utilized as support for metallic catalyst, raising questions on their inability to be applied as catalyst. Hence, this study has itemized these various reactions, detailing their applications which are highly industrialized reaction processes.

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Section: Discussionmentioning

confidence: 96%

Section: Hydrogenation Reactionmentioning

confidence: 89%

Section: Hydrogenation Reactionmentioning

confidence: 99%

Section: Hydrogenation Reactionmentioning

confidence: 99%

See 2 more Smart Citations

The Functionality of Ion Exchange Resins for Esterification, Transesterification and Hydrogenation Reactions

Osazuwa

Abidin

2020

ChemistrySelect

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“…It is well-established that bicarbonate ions present similar chemical properties to nitrate ions, and thus it can be expected that both anions would be adsorbed on the same catalytic sites. Therefore, the catalytic surface available for nitrate ions will be lower, and so will be the activity (Mendow et al, 2017).…”

Section: Table 3 Conversion Of Nomentioning

confidence: 99%

REMOVAL OF NITRATE FROM DRINKING WATER BY USING PdCu STRUCTURED CATALYSTS BASED ON CORDIERITE MONOLITHS

Jaworski

Barbero

Siri

et al. 2019

Braz. J. Chem. Eng.

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Structured catalysts were prepared, characterized and evaluated in NO 3 removal from drinking water. Different suspensions containing a previously optimized PdCu/5wt% ZrO 2-Al 2 O 3 powder catalyst (hereinafter PdCu/5ZA p) were prepared and deposited on cordierite monoliths by washcoating. The effect of suspension concentration, the particle size, the immersion number, the use of suspension stabilizer agent, and an alumina precoating on the coating adherence and catalytic performance were studied. All the prepared structured catalysts were active for the elimination of NO 3 and presented good selectivity to N 2 (> 93%) in synthetic water samples. The catalyst performance was related to the amount of deposited catalyst. The highest activity and the best coating adherence were obtained with the structured catalyst prepared by a single immersion in a 14 wt% concentration suspension, which was obtained from the powder catalyst milled for 10 h and stabilized with colloidal alumina. This catalyst also showed good activity when it was reused for four cycles and when it was evaluated with real water samples.

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Dendritic Cell‐Inspired Designed Architectures toward Highly Efficient Electrocatalysts for Nitrate Reduction Reaction

Luo

et al. 2020

Small

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Electrocatalysis for nitrate reduction reaction (NRR) has recently been recognized as a promising technology to convert nitrate to nitrogen. Catalyst support plays an important role in electrocatalytic process. Although porous carbon and metal oxides are considered as common supports for metal‐based catalysts, fabrication of such architecture with high electric conductivity, uniform dispersion of nanoparticles, and long‐term catalytic stability through a simple and feasible approach still remains a significant challenge. Herein, inspired by the signal transfer mode of dendritic cell, an all‐carbon dendritic cell‐like (DCL) architecture comprising mesoporous carbon spheres (MCS) connected by tethered carbon nanotubes (CNTs) with CuPd nanoparticles dispersed throughout (CuPd@DCL‐MCS/CNTs) is reported. An impressive removal capacity as high as 22 500 mg N g−1 CuPd (≈12 times superior to Fe‐based catalysts), high nitrate conversion (>95%) and nitrogen selectivity (>95%) are achieved under a low initial concentration of nitrate (100 mg L−1) when using an optimized‐NRR electrocatalyst (4CuPd@DCL‐MCS/CNTs). Remarkably, nitrate conversion and nitrogen selectivity are both close to 100% in an ultralow concentration of 10 mg L−1, meeting drinking water standard. The present work not only provides high electrocatalytic performance for NRR but also introduces new inspiration for the preparation of other DCL‐based architectures.

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A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin

Cited by 35 publications

References 37 publications

The Functionality of Ion Exchange Resins for Esterification, Transesterification and Hydrogenation Reactions

The Functionality of Ion Exchange Resins for Esterification, Transesterification and Hydrogenation Reactions

REMOVAL OF NITRATE FROM DRINKING WATER BY USING PdCu STRUCTURED CATALYSTS BASED ON CORDIERITE MONOLITHS

Dendritic Cell‐Inspired Designed Architectures toward Highly Efficient Electrocatalysts for Nitrate Reduction Reaction

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