Active carbon–ceramic sphere as support of ruthenium catalysts for catalytic wet air oxidation (CWAO) of resin effluent

Liu, Weimin; Hu, Yan; Tu, Shan‐Tung

doi:10.1016/j.jhazmat.2010.03.038

Cited by 25 publications

(6 citation statements)

References 24 publications

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“…The oxidation of phenol by the CWAO process is accompanied by intermediates and by-products, such as small molecular organic acids that are refractory to the oxidation and they contribute to the residual COD values. 53 As can be seen in Figure 11b, the conversion of COD follows the same trend as phenol conversion. Within 8.5 h of reaction, PI-3, PI-5, and ACI-5 catalysts all achieved a similar COD conversion (about 85%), while the COD conversion of ACI-3, ACI-1, and PI-1 catalysts decreased to ∼77%.…”

Section: Resultssupporting

confidence: 52%

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Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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A series of Cu-loaded biomass-derived activated carbon (Cu/AC) catalysts with various impregnation ratios were prepared by precursor impregnation (PI) and activated carbon impregnation (ACI) methods. N 2 adsorption−desorption, inductively coupled plasma, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, etc., were used to investigate their physicochemical properties. The performance of catalytic wet air oxidation (CWAO) of phenol using O 2 as the oxidant was evaluated. The results demonstrated that the catalysts prepared by the PI method have higher specific surface area and Cu content. In the catalysts, Cu species coexisted with Cu 2+ and (Cu + + Cu 0 ). The content of (Cu + + Cu 0 ) in PI catalysts was higher, which was favorable for the formation of free radicals (O 2 − • and HO•), and then improved the conversions of phenol and chemical oxygen demand. The PI catalyst prepared with an impregnation ratio of 3 exhibited the best catalytic activity for phenol oxidation. Meanwhile, the loss of Cu species was the main cause of catalyst deactivation.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 78%

Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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“…On one hand, the solubility of oxygen increases when the temperature is above 100 °C. On the other hand, according to Arrhenius's law, a higher temperature would provide a higher reaction efficiency, which is favorable for the oxidizing reaction [26,27]. In this study, the influence of reaction temperature (in the range of 180-260 °C) was investigated.…”

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

High-Performance Catalytic Wet Oxidation of Excess Activated Sludge Derived from Pharmaceutical Wastewater Treatment Process over a Cu/γ-Al2O3 Catalyst

Chu,

Zeng,

Lin

et al. 2023

Water

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The performance of catalytic wet oxidation of excess activated sludge derived from pharmaceutical wastewater treatment over a Cu/γ-Al2O3 catalyst was investigated. The experiments were performed with a stainless steel autoclave reactor by using the prepared Cu/γ-Al2O3 catalyst. The effects of reaction conditions were examined, including additional catalyst amount, reaction temperature, time, and initial oxygen pressure. Results demonstrated that the catalyst, fabricated via co-precipitating method, has excellent catalytic performance. Through the study on condition optimization, the highest removal rates of volatile suspended solids (VSS, 93.6%) and total chemical oxygen demand (TCOD, 76.5%) were acquired with the reaction temperature 260 °C, time 60 min, initial oxygen pressure 1.0 MPa, and the prepared catalyst 5.0 g/L. The volatile fatty acids (VFAs) produced from the wet oxidation of sludge included acetic (mainly), propanoic, isobutyric, and isovaleric acids, which have great potential for the utilization as organic carbon sources in biological wastewater treatment plant. These results demonstrated that the proposed method, catalytic wet oxidation over Cu/γ-Al2O3 catalyst, is effective for treating excess activated sludge and resource utilization of organic carbon in the sludge.

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“…In the three phase CWAO process, organic pollutants are oxidized by activated O 2 species in the presence of a solid catalyst, forming biodegradable intermediates (such as low molecular weight carboxylic acids), or are mineralized to CO 2 , water and associated inorganic salts. Several recently developed heterogeneous catalysts, including transition metal oxides and noble metals deposited on different supports, have shown good catalytic activity in CWAO of organic pollutants present in drinking and wastewater [132][133][134]. The use of mixed metal oxides for CWAO of phenol in water was reported [123].…”

Section: Catalytic Wet Air Oxidationmentioning

confidence: 99%

Water Treatment Technologies: Principles, Applications, Successes and Limitations of Bioremediation, Membrane Bioreactor and the Advanced Oxidation Processes

Olushola¹,

Ayanda²

2017

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All book chapters are Open Access distributed under the Creative Commons Attribution 3.0 license, which allows users to download, copy and build upon published articles even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. However, users who aim to disseminate and distribute copies of this book as a whole must not seek monetary compensation for such service (excluded OMICS Group representatives and agreed collaborations). After this work has been published by OMICS Group, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the work must explicitly identify the original source. Notice: Statements and opinions expressed in the book are those of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book.

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Active carbon–ceramic sphere as support of ruthenium catalysts for catalytic wet air oxidation (CWAO) of resin effluent

Cited by 25 publications

References 24 publications

Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

High-Performance Catalytic Wet Oxidation of Excess Activated Sludge Derived from Pharmaceutical Wastewater Treatment Process over a Cu/γ-Al2O3 Catalyst

Water Treatment Technologies: Principles, Applications, Successes and Limitations of Bioremediation, Membrane Bioreactor and the Advanced Oxidation Processes

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