Catalytic wet peroxide oxidation of phenol over Cu–Ni–Al hydrotalcite

Zhou, Shiwei; Qian, Zhenying; Sun, Tao; Xu, Jin; Chen, Xia

doi:10.1016/j.clay.2011.05.013

Cited by 82 publications

(29 citation statements)

References 42 publications

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“…Chaliha et al (2008) considered that on further oxidation, hydroquinone was converted to p-benzoquinone, which was easily oxidized to maleic acid, and finally low molecular mass organic acids such as oxalic acid, formic acid and acetic acid formed. This was very similar to the oxidation pathway of phenol (Quintanilla et al, 2010;Zhou et al, 2011b;Zrnčević and Gomzi, 2005), but in fact the oxidation of 4-CP was much more complex than that of phenol. On the one hand the formation of hydroquinone was not dominant pathway; on the other hand the hydroxylation and chlorination of hydroquinone was probably to take place, leading to the formation of more complex compounds (Catrinescu et al, 2011;Li et al, 1999).…”

Section: Mechanism Of Catalytic Wet Peroxide Oxidation Of 4-cpsupporting

confidence: 53%

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

Zhou

Zhang

et al. 2014

Applied Clay Science

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Al-Fe-, Al-Cu-, and Al-Fe-Cu-PILCs were synthesized, characterized and tested in the catalytic wet peroxide oxidation of 4-chlorophenol (4-CP). An apparent induction period followed by a rapid oxidation was observed during the Fenton-like reaction, and the whole reaction could be modeled well using a Fermi's kinetic equation (R 2 = 0.9938~0.9993). The generation of hydroxyl radicals (HO • ) from surface-catalyzed decomposition of H 2 O 2 was the oxidation cause whereas the dissolution of active metals was its result. Accordingly, induction period was the cause of heterogeneous surface activation (catalysis or modification) for more HO • formed by decreasing pH. 4-CP oxidation proceeded via 4-chlorocatechol (major) and hydroquinone (minor) pathways, along the formation of main intermediate (5-chloro-1,2,4-benzentriol). Finally besides CO 2 , H 2 O and Cl − two main compounds (I and II) formed, where the former was identified as 2,4-dioxopentanedioic acid whereas the latter as ferric-oxalate complex. There were marked structural and active differences between Al-Fe-PILC and Al-Cu-PILC in which compared to the latter, the former possessed higher SSA and activity but its optimal calcination temperature was lower and the induction time was also longer. In addition, compound II accounted for a considerable proportion in Al-Fe-PILC system whereas compound I was almost only component in Al-Cu-PILC system.

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Section: Mechanism Of Catalytic Wet Peroxide Oxidation Of 4-cpsupporting

confidence: 53%

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

Zhou

Zhang

et al. 2014

Applied Clay Science

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“…Mg-Al mixed oxides possess strong surface basicity, high surface area and high quantity of defects resulting from incorporation of Al 3+ in the MgO lattice [8]. These catalysts are attractive catalysts for reactions such as the transesterification [9][10][11][12], aldol or Knoevenagel condensation [13][14][15] and the others [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Transesterification of rapeseed oil by Mg–Al mixed oxides with various Mg/Al molar ratio

Hájek

Kutálek

Smoláková

et al. 2015

Chemical Engineering Journal

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“…Catalytic oxidation has been reported to be effective for the near-ambient degradation of biorecalcitrant contaminants, because it enables nearly complete degradation (Garrido-Ramírez et al, 2010). Zhou et al (2011a) pointed out that in recent years there has been considerable interest in the development of copper-based heterogeneous catalysts especially, the hydrotalcite-like compounds. These hydrotalcite-like compounds, referred to as layered double hydroxides, are a class of layered materials receiving increased attention lately because of their diverse applications, especially in catalysis.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in this work, we focus on Cu/Mg/Al (CMA) as a catalyst, because all the elements in this compound are routinely used in waterworks systems and are easily available compared to Ni, Pd, and Ag that were previously applied by other researchers (Nawrocki and Kasprzyk-Hordern, 2010;Zhou et al, 2011a). For example, Zhou et al (2011a) used Cu/Ni/AlCO 3 for the removal of a pollutant from an aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

Ahmadi

Ramavandi

Sahebi

2014

Chemical Engineering Communications

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This study investigated the treatment of an azo dye, as a biorecalcitrant model, from industrial wastewater by using Cu/Mg/Al-chitosan in a fluidized catalyst-bed reactor. A number of variables were used to study the impact they had on the oxidation process involving azo dye. The maximum degradation of the azo dye was achieved at 7 g Cu/Mg/Al-chitosan. The chloride and sulfate ions had a synergistic effect on azo dye removal. The oxidation of the azo dye under the selected conditions was of pseudo-first order. Textile wastewater could effectively be treated using a low concentration of about 7 g of Cu/Mg/Al-chitosan in a short hydraulic retention time of 10 min. The use of Cu/Mg/Al-chitosan demonstrated a promising method to eliminate the azo dye from the wastewater.

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Catalytic wet peroxide oxidation of phenol over Cu–Ni–Al hydrotalcite

Cited by 82 publications

References 42 publications

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

Transesterification of rapeseed oil by Mg–Al mixed oxides with various Mg/Al molar ratio

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

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