Wet oxidation of phenol by hydrogen peroxide using heterogeneous catalysis Fe-ZSM-5: a promising catalyst

Fajerwerg, Katia; Debellefontaine, H.

doi:10.1016/s0926-3373(96)00041-0

Cited by 166 publications

(81 citation statements)

References 8 publications

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“…Figs. 6.3 and 6.10); -It is often less sensitive to pH variations, in line with other reports, particularly in what concerns phenol and carboxylic acids degradation [31,60].…”

Section: Heterogeneous Versus Homogenous Processsupporting

confidence: 89%

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Herney-Ramírez

Madeira

2010

Pillared Clays and Related Catalysts

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Clays, both natural and physical-chemically modified, are attractive materials for the preparation of supported catalysts. In this chapter, a review is made regarding the use of pillared interlayered clays (PILCs) in heterogeneous Fentonlike advanced oxidation processes. Their applications in pollutants degradation is summarized, with particular emphasis on the effect of the main operating conditions (e.g., initial H 2 O 2 or parent compound concentration, catalyst load, pH, or temperature) on oxidation efficiency. Special attention is also given to the type of catalyst or precursor used, to the importance and advantages of the heterogeneous versus homogeneous process, and to significant aspects like catalyst stability. Among the technological issues that are of concern, the importance of using continuous flow reactors (e.g., fixed-bed) is discussed. Finally, some mechanistic studies are reviewed as well as modeling works, based on phenomenological or semi-empiric models (e.g., using statistic tools like design of experiments).

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“…Figs. 6.3 and 6.10); -It is often less sensitive to pH variations, in line with other reports, particularly in what concerns phenol and carboxylic acids degradation [31,60].…”

Section: Heterogeneous Versus Homogenous Processsupporting

confidence: 89%

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Herney-Ramírez

Madeira

2010

Pillared Clays and Related Catalysts

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“…pH was another factor influencing the leach out Cu cations from zeolite structure into the solution 35,9 . The leaching of copper ions was enhanced at low pH values 36 . Since pH of Cu/Y5 suspension is lower than that of Cu/ZSM5 suspension ( Table 3) the amount of leached copper during its use is expected to be higher in the Cu/Y5 sample.…”

mentioning

confidence: 94%

Phenol oxidation with hydrogen peroxide using Cu/ZSM5 and Cu/Y5 catalysts

Valkaj

Wittine

Margeta

et al. 2011

Polish Journal of Chemical Technology

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In this work, catalytic activity and stability of Cu/Y5 and Cu/ZSM5 zeolites in phenol oxidation with hydrogen peroxide were examined. The catalyst samples were prepared by the ion exchange method of the protonic form of commercial zeolites. The catalysts were characterized by the powder X-ray diffraction (XRD), AAS, while the adsorption techniques were used to measure the specific surface area. The thermal programmed desorption of NH3 (NH3-TPD) was used for measuring the total number of acid sites formed on the surface of zeolites. Catalytic performance of the prepared samples was monitored in terms of phenol, hydrogen peroxide and total organic carbon (TOC) conversion, by-product distribution and a degree of copper leached into the aqueous solution.It was found that the activity of Cu/Y5 catalyst was generally higher than that of Cu/ZSM5 and that unlike Cu/ ZSM5, Cu/Y5 catalyzed phenol oxidation more completely.

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“…One of these is the catalytic wet air oxidation in which either homogenous or heterogeneous catalysts were used to enhance the degradation [11,25,40,44]. The wet oxidation method was also enhanced by using ozone [3] or hydrogen peroxide [14,15,42] as an oxidizing agent. Supercriticaloxidation [37] was also tried in order to improve the oxidation of sorne compounds.…”

Section: Wet Air Oxidation Enhancementsmentioning

confidence: 99%

Wet Air Oxidation of Benzene

Abussaud

Ulkem

Berk

et al. 2008

Ind. Eng. Chem. Res.

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The wet air oxidation of benzene has been studied in a 1.24 L stainless steel autoclave at a temperature in the range of 190-260 °C. The oxygen partial pressure was varied from 0.69 to 1.72 MPa. The initial C 6 H 6 concentration was 5.63 mmol/L. The influence of the pH was studied, and the main reaction intermediates were determined. It was found that the temperature has a great influence on the wet air oxidation of benzene. The effect of the oxygen partial pressure was significant only at the beginning of the reaction. Decrease of the initial pH of the reaction results in a considerable increase in the benzene degradation rate, especially at the lower temperature. The main intermediates were found to be acetic acid and formic acid.

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Wet oxidation of phenol by hydrogen peroxide using heterogeneous catalysis Fe-ZSM-5: a promising catalyst

Cited by 166 publications

References 8 publications

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Use of Pillared Clay-Based Catalysts for Wastewater Treatment Through Fenton-Like Processes

Phenol oxidation with hydrogen peroxide using Cu/ZSM5 and Cu/Y5 catalysts

Wet Air Oxidation of Benzene

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