Kinetics of Wet Air Oxidation of High-Strength Industrial Wastewater

Lin, Sheng H.; Ho, S.J.

doi:10.1061/(asce)0733-9372(1997)123:9(852)

Cited by 17 publications

(9 citation statements)

References 12 publications

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“…Similar pH trends have been reported by others researchers in WO studies (Lin and Ho, 1997). At 190ºC, the pH decreases continuously during the experiment, revealing that the oxidation mechanism is significantly slower than at 220ºC.…”

supporting

confidence: 90%

“…L'oxydation en voie humide non catalytique biphasique (gaz-liquide) a été comparée à un système triphasique (gaz-liquidesolide) avec des catalyseurs d'oxyde de Meytal and Sheintuch, 1998). Different model compounds such as low molecular weight acids (Shende and Levec, 1999;Gomes et al, 2000), phenolic compounds (Pintar and Levec, 1994) and aldehydes (Silva et al, 2003) have been used in order to understand the process applicability for industrial wastewaters generated in pulp and paper mill effluents (Zhang and Chuang, 1999;Quinta-Ferreira et al, 2001), desizing wastewaters (Lin and Ho, 1997), formalin synthesis, and urea-formaldehyde-resin production (Silva et al, 2003). Nevertheless, very few investigations have reported the wet oxidation process for PVA degradation and, in particular, literature concerning the use of active solid catalysts was not found.…”

Section: Randd Notementioning

confidence: 99%

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Gas‐Liquid‐Solid Reactions of Polyvinyl Alcohol on Oxidation Treatments for Environmental Pollution Remediation

et al. 2003

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Polyvinyl alcohol (PVA) oxidation in liquid‐phase was studied in a batch high‐pressure reactor at 140 to 240°C and 0.7 MPa oxygen partial pressure. The two‐phase (gas‐liquid) non‐catalytic wet oxidation was compared with a three‐phase system (gas‐liquid‐solid) using CuO‐ZnO/Al2O3 and Mn‐Ce‐O oxides catalysts. This study pointed out oxidation processes as quite promising technologies for industrial effluents containing PVA, leading to high reductions in PVA and total organic carbon (TOC) levels. Catalysts showed high activity at 180°C and carbon adsorption was not observed; Mn‐Ce‐O showed significant leaching to the liquid‐phase, compared with CuO‐ZnO/Al2O3. Acetic and formic acids were detected as refractory compounds for oxidation.

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supporting

confidence: 90%

Section: Randd Notementioning

confidence: 99%

Gas‐Liquid‐Solid Reactions of Polyvinyl Alcohol on Oxidation Treatments for Environmental Pollution Remediation

et al. 2003

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“…Previous works reported the same type of behavior in the oxidation of other pollutants. [18][19][20]…”

Section: Resultsmentioning

confidence: 99%

Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model

Silva

Quinta‐Ferreira

Levec

2003

Ind. Eng. Chem. Res.

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Formaldehyde is a carcinogen compound and one of the most important pollutants contained in wastewaters. Three different treatments were evaluated in a high-pressure batch reactor for the total organic carbon (TOC) degradation of formaldehyde solutions: thermolysis, noncatalytic wet oxidation, and catalytic wet oxidation over a CuO-ZnO/Al 2 O 3 catalyst. The absence of the catalyst leads to a predominant induction period (30 min) without changes in TOC concentrations, while the catalytic treatment leads to significant enhancement in TOC reduction. In the catalytic experiments, an asymptotic behavior was observed with a final TOC reduction of approximately 80%, with the remaining nonoxidizable TOC being due to methanol, a refractory compound contained in the formaldehyde solution that is resistant to oxidation even with increasing temperature and pressure. Formic acid was identified as an intermediary compound, and a new kinetic model was developed, designed as the modified generalized kinetic model, to account for refractory and nonoxidizable compounds. Moreover, leaching of the catalyst in the liquid phase was not significant, and the carbon adsorption capacity was not detected.

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“…Assuming first order kinetics for each reaction path, the generalized kinetic model is given by [19]:…”

Section: Kinetic Modelmentioning

confidence: 99%

Photochemical treatment of phenol aqueous solutions using ultraviolet radiation and hydrogen peroxide

Poulopoulos

Arvanitakis

Philippopoulos

2006

Journal of Hazardous Materials

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Kinetics of Wet Air Oxidation of High-Strength Industrial Wastewater

Cited by 17 publications

References 12 publications

Gas‐Liquid‐Solid Reactions of Polyvinyl Alcohol on Oxidation Treatments for Environmental Pollution Remediation

Gas‐Liquid‐Solid Reactions of Polyvinyl Alcohol on Oxidation Treatments for Environmental Pollution Remediation

Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model

Photochemical treatment of phenol aqueous solutions using ultraviolet radiation and hydrogen peroxide

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