Catalytic Wet Air Oxidation:  Are Monolithic Catalysts and Reactors Feasible?

Cybulski, Andrzej

doi:10.1021/ie060906z

Cited by 113 publications

(42 citation statements)

References 218 publications

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“…In the abovementioned AOPs, supported or unsupported heteroge-neous metal oxides (e.g., Cu, Zn, Mn, Fe, Co and Bi) and noble metals (e.g., Ru, Pt, Pd, Ir and Rh), carbon materials as well as different photocatalysts (e.g., TiO2, ZnO, WO3, pure or modified by metal deposi-tion, coupling with other materials, or by doping with metals/non-metal ions) have been widely employed (Bhargava et al, 2006;Cybulski, 2007;Herney-Ramirez et al, 2010;Liotta et al, 2009;Stüber et al, 2005). More recently, metal-free carbon materials as catalysts on their own have gained increasing attention due to actual concerns with metal scarcity and catalyst deactivation by metal leaching.…”

Section: Advanced Oxidation Processes (Aops): Concept and Fundamentalsmentioning

confidence: 99%

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Ribeiro

Nunes

Pereira

et al. 2015

Environment International

842

319

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Environmental pollution is a recognized issue of major concern since a wide range of contaminants has been found in aquatic environment at ng L −1 to μg L −1 levels.In the year 2000, a strategy was defined to identify the priority substances concerning aquatic ecosystems, followed by the definition of environmental quality standards (EQS) in 2008. Recently it was launched the Directive 2013/39/EU that updates the water framework policy highlighting the need to develop new water treatment technologies to deal with such problem. This review summarizes the data published in the last decade regarding the application of advanced oxidation processes (AOPs) to treat priority compounds and certain other pollutants defined in this Directive, excluding the inorganic species (cadmium, lead, mercury, nickel and their derivatives).The Directive 2013/39/EU includes several pesticides

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Section: Advanced Oxidation Processes (Aops): Concept and Fundamentalsmentioning

confidence: 99%

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Ribeiro

Nunes

Pereira

et al. 2015

Environment International

842

319

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“…Heponiemi and coworkers [18] carried out Ru catalyzed oxidation of waste waters originating from meat processing and vegetable processing industries. Three rather detailed reviews were published concerning wet oxidation and catalytic wet oxidation [19][20][21]. They also mention the oxidation of miscellaneous organic compounds, but do not contain data specifically about the oxidation of pharmaceutical PWW's.…”

Section: Introductionmentioning

confidence: 99%

Wet oxidation properties of process waste waters of fine chemical and pharmaceutical origin

Hosseini¹,

Tungler²,

Bakos

2011

Reac Kinet Mech Cat

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Wet oxidation was carried out for treating different industrial process wastewaters (PWW's) of pharmaceutical production, with oxygen in a stainless steel autoclave at 230 and 250°C and total pressure of 50 bar. Beside non-catalytic, a catalytic reaction was also carried out. The catalyst applied was Ti mesh covered with Ru and Ir oxide. PWW samples were analyzed with respect to their TOC, COD (BOD) content. The tested PWW's could be oxidized but with rather different conversions. Some effluents were converted with remarkable rate due in some cases to their Fe or Cu ion content, in other cases to the Ti based precious metal oxide catalyst.

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“…In contrast, wet air oxidation (WAO) operates at harsh conditions, which can become milder in the presence of active catalysts (400-523 K, 0.5-5.0 MPa) [5][6][7][8][9][10][11][12][13][14][15]. Several heterogeneous catalysts based on supported or unsupported metal oxides (e.g., Cu, Zn, Mn, Fe, Co, and Bi) and noble metals (e.g., Ru, Pt, Pd and Rh) have been tested in the last four decades for catalytic wet air oxidation (CWAO) [5][6][7][8][9][10][11]13,14]. However, deactivation phenomena are frequent, such as leaching of active metals to the liquid phase.…”

Section: Introductionmentioning

confidence: 99%

Degradation of trinitrophenol by sequential catalytic wet air oxidation and solar TiO2 photocatalysis

Katsoni

Gomes

Pastrana‐Martínez

et al. 2011

Chemical Engineering Journal

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a b s t r a c tCatalytic wet air oxidation (CWAO) and solar TiO 2 photocatalysis were investigated as advanced oxidation processes to degrade trinitrophenol (TNP) in model aqueous solutions. An activated carbon (AC) treated with sulphuric acid of different concentrations (5, 10 and 18 M) at two different temperatures (353 and 423 K) was investigated as a metal-free CWAO catalyst, while a commercially available P25 TiO 2 powder was used as a photocatalyst. CWAO experiments were conducted at 448 K, 0.7 MPa oxygen pressure (4.7 MPa of total pressure), 1.3 g L −1 AC loading and 270 mg L −1 TNP concentration, while photocatalytic experiments were conducted at ambient temperature, 1 g L −1 photocatalyst loading, 500-1000 W m irradiance provided by a solar simulator and 32-270 mg L −1 TNP concentration. Treatment efficiency was assessed by measuring the concentrations of TNP and nitrates, total organic carbon (TOC) and biochemical oxygen demand (BOD 5 ). Up to 90% TNP degradation was attained during CWAO over 120 min, from an initial concentration of 270 mg L −1 . For the same TNP concentration, TiO 2 photocatalysis gives only 13% conversion over the same 120 min. However, for TNP concentrations below 144 mg L −1 , photocatalysis can be effectively used: 100 and 80% TNP degradation obtained in 120 min of irradiation for initial TNP concentrations of 64 and 144 mg L −1 , respectively. In this respect, CWAO and photocatalysis were employed sequentially to treat TNP; complete TNP conversion being achieved after 120 min of CWAO followed by 60 min of photocatalysis at 1000 W m −2 irradiance, and this was accompanied by 82% TOC reduction, as well as an increase of BOD 5 /TOC ratio from 0 to 2.28.

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Catalytic Wet Air Oxidation: Are Monolithic Catalysts and Reactors Feasible?

Cited by 113 publications

References 218 publications

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Wet oxidation properties of process waste waters of fine chemical and pharmaceutical origin

Degradation of trinitrophenol by sequential catalytic wet air oxidation and solar TiO2 photocatalysis

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