Catalytic wet air oxidation of aqueous solution of phenol in a fixed bed reactor over Ru catalysts supported on ceria promoted MCM-41

Mondal, Dilip Kumar; Mondal, Chanchal; Roy, Shyamal

doi:10.1039/c6ra22080k

Cited by 23 publications

(10 citation statements)

References 41 publications

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“…Thus, it has recently attracted considerable attention due to its wide application in wastewater treatment and high efficiency in eliminating various types of pollutants. [6][7][8] In order to optimize reaction conditions and improve the catalytic performance (i.e. high efficiency, good stability and reusability), lots of heterogeneous catalysts have been successfully prepared.…”

Section: Introductionmentioning

confidence: 99%

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

et al. 2018

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A series of novel Pt-modified Cu-Fe-La/g-Al 2 O 3 catalysts were prepared by an incipient-wetness impregnation method, and their performances were evaluated in catalytic wet air oxidation (CWAO) of printing and dyeing wastewater (PDW). The as-prepared catalysts were characterized by X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman spectroscopy, and temperature programmed reduction by hydrogen (H 2 -TPR). The effects of catalyst composition and calcination temperature on the catalytic performance were investigated. The chemical oxygen demand (COD) removal efficiency and decolorization rate are satisfactory over Cu 1.5 Fe 1.5 La 3 /g-Al 2 O 3 catalyst, with poor stability under CWAO conditions. In contrast, catalytic performance and stability of all Pt-modified catalysts are significantly improved. With increasing calcination temperatures from 350 C to 750 C, the activity of the catalysts significantly decreases from 97.3% to 84.6%, and the size of the particles varies from 4.71-6.95 nm. The XRD, HRTEM, and XPS results indicate that the Pt , and the incorporation of Pt increases the binding energies (BEs) of the metal elements in the catalyst, owing to synergistic interactions between the Pt and the Cu, Fe, and La elements. After five cycles, the COD removal efficiency and decolorization rate for PDW over the Pt 1 Cu 1 Fe 1 La 3 /g-Al 2 O 3 catalyst calcined at 650 C remain comparable with the fresh catalyst, indicating that Pt-modified Cu-Fe-La/g-Al 2 O 3 ternary oxide is a promising catalyst with high activity and stability for CWAO treatment. Fig. 1 Influence of components on the activity and stability of catalysts. (a) COD removal efficiency, (b) decolorization rate, (c) metal leaching, ()) Pt

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Section: Introductionmentioning

confidence: 99%

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

et al. 2018

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“…The resulting materials showed high catalytic activity a tandem oxidation-Wittig olefination of different benzyl alcohols (Figure 53). In 2016, Roy et al [122] developed a Ru nanoparticles supported on a CeO2 doped MCM-41 for the treatment of phenol-containing wastewater. The use of metal catalyst for the removal of such pollutants represent a more environmentally friendly alternative, in contrast of the most commonly used methods such as incineration and biological treatments.…”

Section: Ruthenium Nanoparticles Supported On Mcm-41mentioning

confidence: 99%

Functionalized Ordered Mesoporous Silicas (MCM-41): Synthesis and Applications in Catalysis

et al. 2018

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Mesoporous silica sieves are among the most studied nano-objects due to their stable pore structure and easy preparation. In particular, MCM-41 have attracted increasing research attention due to their chemical versatility. This review focuses on the synthesis and regioselective functionalization of MCM-41 to prepare catalytic systems. The topics covered are: mono and di-functionalized MCM-41 as basic and acid catalysts, catalysts based on metallic complexes and heteropolyacids supported onto MCM-41, metallic nanoparticles embed onto functionalized MCM-41 and magnetic MCM-41 for catalytic purposes.

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“…Many advanced techniques are used for recovering, removing, treating the chemical pollutants from water surface [1] including physico chemical or biological methods. There are a lot of methods that used different solutions such as micro-filtration, filters or ultra-filtration, chemical dispersant, osmosis methods, separation based on the gravity, biological [2][3][4] . However, adsorption might be the most suitable method to recover, remove, and treat the polluted components related to the oil and oil processing products [5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Removal of Some Chemical Pollutants from Aqueous Solutions by using of Porous Polymers manufactured with Rice Straw

2020

JCBSC

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The goal of this article is to through light on ways and means of the beneficial utilization of rice straw. New technologies and solutions for contribution to the environmental protection, minimizing health hazards as well as the economic return on agriculture and industry in Egypt. So we were used rice straw (RS) with polyurethane (PU) foams, to fabricate a porous polymer sorbent material, to remove chemical pollutant from solutions. These fabricated polymers have function groups and pores that are responsible for the absorption process for chemical pollutants from aqueous solutions. The absorption capacity of synthesised sorbent polymers for petroleum oil (crude oil) and heavy metal ions (Cd 2+ , Cu 2+) were calculated. The optimum conditions at which the high efficiency for the absorption process proceeded was investigated such as percentage of components for synthesis of polyurethane and rice straw fabrication, effect of time. Moreover SEM shows the pores of the synthesized polymer. The experimental result showed that PU with the 160:50ratio of toluene di-isocyanate (component-1) and glycerol (component-2) showed the highest absorption capacity, equal to 3.639 g/g. Thus, the new fabricated sorbent polymer optimum conditions by addition for synthesized polyurethane 30% of rice straw mass and 500 μm of size was highest, the optimum time for absorption capacity was after 120 minutes and the metal ion absorption capacity for Cd 2+ , Cu 2+ was 220.9 mg/g and 200.6 mg/g respectively.

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Catalytic wet air oxidation of aqueous solution of phenol in a fixed bed reactor over Ru catalysts supported on ceria promoted MCM-41

Abstract: Catalytic wet air oxidation (CWAO) of phenol was carried out in a fixed bed reactor over a noble metal (Ru) supported on silica MCM-41 material.

Cited by 23 publications

References 41 publications

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Functionalized Ordered Mesoporous Silicas (MCM-41): Synthesis and Applications in Catalysis

Removal of Some Chemical Pollutants from Aqueous Solutions by using of Porous Polymers manufactured with Rice Straw

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Catalytic wet air oxidation of aqueous solution of phenol in a fixed bed reactor over Ru catalysts supported on ceria promoted MCM-41

Abstract: Catalytic wet air oxidation (CWAO) of phenol was carried out in a fixed bed reactor over a noble metal (Ru) supported on silica MCM-41 material.

Cited by 23 publications

References 41 publications

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al2O3 ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al2O3 ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Functionalized Ordered Mesoporous Silicas (MCM-41): Synthesis and Applications in Catalysis

Removal of Some Chemical Pollutants from Aqueous Solutions by using of Porous Polymers manufactured with Rice Straw

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Resources

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Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al₂O₃ ternary catalyst for catalytic wet air oxidation: effect of calcination temperature